INSTALLATION AND INITIAL ADJUSTMENT - NAVSHIPS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP67B00341R000800090001-3
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 276
• Document Creation Date: December 23, 2016
• Document Release Date: November 21, 2013
• Sequence Number: 1
• Content Type: PHOTO

INSTALLATION AND
INITIAL ADJUSTMENT
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
IN. BRASS PIPE (FOR AIR SUPPLY TO ANTENNA COAXIAL)
FITEITYDRAT-1
IUNIT I
CAKI3-10AEK I
RECEPTACLE TYPE 06
I1i4L.
PLUS TYPE DO
? 70 115 V IN 60,
7.7 AMPS CONTINUOUSLY
ENERGIZED SOURCE
BOX NAMEPLATE
SEE DETAIL
A-C
STABILIZER
C6-301252 I KVA
02E601
82
MODULATOR
CAY-50AGU
E.2001
POWER
19fRR20
(INEREO
11,ERRIOI
IR-ER101
TO LET EQUIPMENT
SEEMLY. DWG& 0.3 04
P-t001 R12-27/U P-I08
9.1==' '1111
P-t002 MMFA-10 P-I07
?
113 04* E.)
2202 0---E-140
2203 54-4-E140
34 0-E-140
35 0--I-E-141
38 0 -??-?-?E-,
ORIGINAL
E-200I
E-200
E2 001
E- ROM
E-E001
12001
Map
TERMINAL BOARDS E-140 ARO E-14i
USED ONLY IN TRANSCEIVER CAT.
43.40%.
MODULATOR USED ONLY IN SRA
EQUIPMENT.
Re- 20/U LO. R-1R- ERIC
070-10/U LD.
CONNECTOR PLUG
NAVE TYRE 049266
J-103
J-1040 IR-ER3C
TRANSCEIVER
CAY-43ACM
Rartif.
0
115 VA-C
MAIN ?
1/071
KEY
K.V. METER
ECHO SW.
MON. GAIN
0
MEYER
REG.II5 NC
INTERLOCK
J-108
0 PILOT { GO'
CONTROL XMON
@ LOCAL
R.
{ ONOFFCOM.
PW
J-107
E 40
REGULATED{
115 VA-C
?CON.
1SE0WER
.R RAI
1:4
E-105
MO-12/U (SEE NOTE #01
LEL 11R-IR-ER30
-9:F3-- IR - ER2C LE: ZAIR1R.G C:=Lp
IR 0-1R-E192111
IN 0--1R-ER219
20 0.4-t-1/7-ER220
228 0-48-ER228
22r
230-t-4-
44-4-t-
25
1050
350
E-10*
I ERUR
JR-ERRS
IR-ER24
1R-ER25
IR-ERR44
IR-CR45
IR-ER46
IN ?ER1747
1R-ER48
1R-ER49
IR-ERR202
IR-ER202
1R-ERNE
IR-ER013
IR-ER414
SINFA -14 (3SPJ
ECHO ANTENNA
CAY-66AHK
U bl
TO RADAR REPEATER SYSTEM OR
RADAR DISTRIBUTION SWITCHBOARD.
El NOTE IA SEE REF. DINGS. #1,0. BA
TRIGGER
6.
VIDEO
2
0 00 0
OC.7,82
905005
0 0 0
0 0 0
NAVSHIPS 900,946
ANTENNA ASSEMBLY
66 ARE
I--
WwwwWwww cc

IIIIIIIIII
ANTENNA I
INPUT
360 IX IX
GOG 6DG 600
.15352618352Si RI R2R3
PEDESTAL ASSEMBLY
F2 CAJS-2I ACP
11-4D-
RINGs I' ..-1302
362-60G .11301
TRIGGER
TO I.T.T. EQUIPMENT
SEE REF. 0055.03,4,87
CONTROL CABLES
AS REQUIRED
63?6:k0000000
INDICATOR CONSOLE
CAY- 46 ADJ
CONVENIENCE
RECEPTACLE
TO KC) CIRCUIT wHEr+
REOLORED ? SEE NOTE 02
WO NOT INCLUDE MS CIRCUIT
IN RADAR MNFA- 24 EAGLE)
NAMEPLATE MARKINGS
NO.
DESCRIPTION
MOMI14=4;-:=01144.001SUPPLY
F4-24 (2 SRI OR AINFA-26 (ASP.)
CO. 17-IR-ERS
sEe7ii.F.D'4`1.u1,ATEir7
CONSOLE P.P.I.
CAT -55ADV
RO-38/0 CABLES (91
000051
1-11-1.1
CONTROL
CAY-23AEW
0,110002
VIDEO TO THE I.F.F. MAY BE TAKEN
FROM 62 AND 01 OF TB. 0E-1005
IF CONVENIENT
HFA-III IS UP)
(APR-IR-ERA
AINFA?4 (4510)
3"
(ENGRAVE LETTERS TO SUIT)
NAMEPLATE
LAMINATED PHENOLIC rATERIAL
WO. SPEC. 171.5-e THICK
(R-ER82
tWER81
6-1R-ER64
0 0 0 0 0 0 0 0 0 0 0
:azaliagE10?
RECEIVER
CAY-46ADH
COORDINATOR
CAT -23AE V
4 CONDUCTOR
CABLE (Yl
ID CONDUCTOR CABLE (V)
BEARING INDICATOR
CAT- 55AFC
0 0 0 0 0 0 0 0 0 0 0 0 0
iliTS It
000000
DIE .115
L.?
111 1_1 J
::sa2asgssazn:
I 0011:120110
re
HFR-I4 (2
0000
LC R-117-ERII
(BASED ON 516 DROP)
UP TO 300' RS SHOWN
300' TO 460' USE OR-ER202)7 (117-ERR2020
4.6 AMPS 550W. 1.0.P.F.
LO. R-IR-ER14
UP TO 230 USE ONFA-50
115 V. ;0 .5 AMPS 50,10KW
115 vA-cf 02
MAIN 03 IR-ERRIO
1R-ERIO
NEATER a RECEPTACLE
(DAMPS /./O MVA 0.65 P.P.
(BASED ON 5740170P1
UP TO 00'AS SHOWN
140' TO ZOO' USE (1R-ER10(7 (INERRION
L
-7.1714A L.41 Ili
ZORV
Ha
Xt.
X 0.01
271V I
ss
040 t1.19-5L...5)-5
220FOR
V
L:74t.f7111:?12
ei./?0_13 HA
TRANSFORMER
IOKVA (NX55R53303)
CLV-301244
LD. WRHR-ERIS
DHFA-14(220.1
&IPA-S(440El
IR-ER1
IR-ERRI
VOLTAGE
REGULATOR
CAY-211185_1
{
TO 10 EVA AN-POWER SUPPLY
E20 V. A-C STAMPS
440V. A-C 26.5 AMPS
SEE NOTES SE a 7
SWITCH
75 A. FUSE 220 V.
50A. FUSE 440V.
a It.7,2;
oc000
aiagataa
000-0V 000000000
TO RADAR REPEATER
SYSTEM OR RADAR
DISTR BUTION SWITCH-
BOARD. SEE NOTE W6.
SEE REF. DWGS.01.2,66.
MOTOR ALTERNATOR SET
CAY-211182 1115 V1 OR CAY-2111138(230 V)
EXCITER ALTERNATOR-1 MOTOR
1.Y-2,1190 CAy-211184 CAY-211189(IISVI I
CAY?20 11133(230W I
V. 3
THFA-Lii
LO. NIR-ER15
FHFA-3
LD. R-1R-ER16
IX-50
R3fI-i-121?
RANGE
SCOPE
CAY -55AFD
380 OCT
Ir7;771-asi-r--25*
1?1111?11? 1? -
PUSHBUTTONS
TYPE CAT-211186
OMIT SPLICE AND CONNECT CONSOLE I -STOP S_LARC-":11
_ I
AT
FT LROCIAA AL EPTUISAN OMITTED.. 9 i T ON LOICAADTIEGANTEOAAR
I STARTER La.:21:5-4--1-1>: I
?op
WIRE AS PER DOTTED LINE
1121=112117gg
1
FFIFLAD-.3
R:R -1
R 11J.
t
471, IR ERI9 -
_LL
LD.ININE., .R17
5HFA-4 ONFA-4 01591 1011FR-75((15V)
DHFA-31230v) OHFA-2312.30V)
TO D-C POWER SUPPLY
NOVI:PC 156.0 AMPS.
230V.0-C 76.0 AMPS.
SEE NOTES #06 7
SYNCHRO
AMPLIFIER
CM-211103
Y i
11 :
SEE NOTES 02 a ?
CIRCUIT 7P0
TO GYRO SYSTEM
LEI 448-1R.E57
Pze-nR-ER
'R-ER
CONDENSER BLOCK
MK 3 RODS TYPE 9C 30-30-30 WOG GO V 604.1
TO BE CONNECTED AS SHOWN IF INSTALLED
TO RADAR REPEATER
SYSTEM OR RADAR
DISTRIBUTION swtrcH- ANT. BEARING
BOARD. SEE REFERENCE
DRUG. *1,2, AND 6
SI
(NERVY
1R-ER273
IR ER70
IA-ERR70
1R-E074
Mt-ER275
IR ER130
IR ERRS()
IR-ERR
NOTE 1
SEE
R-ERII
R-ERK2
R-ER13
L--I17-ER75
iR-ERK6
1,19R:EERR,R,?,34
1-1R-ER301
BEVEL X IV
LOCATE NEAR CONSOLE
? IF PRACTICABLE
0
o 4T
o 76
57
503
59
60
61
6
72
73
96
97
74
St
53
53
SI
RI
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
MNFA-10 SP.1
La OR-IR-ERG
SEE
NOTE,
IR-ER3I
iNERR32
IR EROS
51
52
5
54
55
56
152
153
154
INN
156
70
7t
INN
169
0 74
SEE
JNOTE 0,41
-ERIO
L-11R-ERRIO{
R-ER202
NERR
IR-ER102
(REPS (02
INERR30
IR ER30
0(96
o 196
6
56
6/
94
95
0205
103
102
003
902
68
65
S DI
101
TIE POINT
INTERCONNECTION
R31.
1
R2 IX GEA,s,h,G
ANTENNA
NOUN
36 x
EMERGENCY
NORMAL
:3 EXCITATION TO
LOCAL P.P.,.
PILOT LIGHT RELATIVE
DIAL LIGHT TRUE
36% YET
GROUND
52
53
SI
52
53
"
INPUT
6X
DSC
GSJ
S21?36
53
INpur
TO ANY.
ROSS
F;,} 471 r. 'DO
T.
AISERVO OUTPUT
l TO ANTENNA tE
SI
PILOT IT. REL. I- la
o
I172 IX
1R2 36X
1R3
IRE
PILOT LT. REL.16.3 0.1
AT,
INT-LOCK
),
115 V NC
REGULATED
GOD.
SHIPS HEAD MARKER
10(FA-14 (55R)
LD S R-I19-ERS
SECTION 3
NOTES
I. THIS PLAN BASED ON INFORMATION CONTAINED IN THE FOLLOWING REFERENCES(
(A) INTERCONNECTION DIAGRAM SR SYSTEM- WESTINGHOUSE DWG. 077300715.
(13) BOOKLET OF INSTALLATION DRAWINGS POP NAVY MODEL'S* RADAR EOUIPMENT
-WESTINGHOUSE DWG.01,7010181.
(C1 MAX. R.F. CABLE LENGTHS - RADAR 8 Ifs,. EQUIPMENT- MU. SNIPS DWG. ORE-AZ-533A.
2. FOR PLANS OF ASSOCIATED SYSTEMS, SEE MODEL ''SN' RADAR ISOMETRIC WIRING
DIAGRAM FOR EACH SHIP.
3.0FICUIT LETTER DESIGNATIONS IR-ERAS 5110711, ARE FOR FIRST AIRCRAFT DETECTION
TYPE RADAR INSTALLED. WHERE ACNE THAN ONE UNIT OF THE SAME TYPE IS INSTALLED
ON A SHIP THE FOLLOWING CIRCUIT DESIGNATIONS ARE TO NE USED IN ORDER OF
INSTALLATION *r2R-Ell: '13R-ER7 ETC.
4. FOR WIRE NARXINGS OF THESE CIRCUITS SEE INDIviDuAL SHIPS ELEMENTARY WIRING !HAGMAN. .
'CABLES MARKED WITS AN ASTER1SX THUS OM ARE SUPPLIED WITH EQUIPMENT. CABLES
MARKED WITH A PLUS Ell ARE FURNISHED. READY-MADE AND ARE INSTALLED IN THE EGUIPMENt
6.THE TRIGGER AND VIDEO INFORMATION TO THE RADAR REPEATER SYSTEM IS SUPPLIED
THROUGH FOUR STRING CONNECTIONS. ? TOTAL OF THREE REPEATER UNITS MAY BE
CONNECTED TO EACH STRING. NOWEVER, THE EXISTING CONSOLE PAL REPEATER IS
.CONNECTED IN STRING 0445 THE FIRST UNIT, SO THAT ONLY TWO ADDITIONAL
REPEATERS CAN BE CONNECTED TO STRING 0 A.
7. FOR SHIPS RAYING DE POWER SUPPLY THE LINE SWITCH AND TRANSFORMER ARE OMITTED
AND THE MIS EQUIPMENT AND WIRING SHOWN DOTTED ARE INSTALLED INSTEAD.
&SYMBOL ($1 INDICATES FRAMES OF APPARATuS TO BE ELECTRICALLY GROUNDED
TO SHIP'S STRUCTURE 0 MEANS OF COPPER STRIPS I IN. 1710E 0 4- IN. TH1GX.
B. THE TRIGGER PULSE CABLE RUN FROM THE RADAR TRANSMITTER. TO THE
EQUIPMENT SHOULD BE REPT AS SHORT AS POSSIBLE, AND SHOULD NOT EXCEED NO FT.
REF. DWGS:
I. TYPE PLAN-RADAR REPEATER STSTEN -RADIO CIRCUIT '11-0r-ELEMENTA0 WIRING
DIAGRAM-RU. SHIPS PLAN NO. S6700 -368670 (4 SNEETSI.
2. TYPE PLAN -RADAR-REMOTE FYI. SYSTEM -RADIO CIRCUIT RtER ELEMENTARY DAWN@
DIAGRAM- NO. SHIPS PLAN NO. 017-S3 (N. YD. N.Y. PLAN NO. 3227041.
S. I.F.F. EQUIPMENT IIK.3 -MODEL 1112' SERIES -CIRCUIT '3R-ER ELEMENTARY WIRING
DIAGRAM. Fla SHIPS PLAN No. FS-56700-361180.
EF.F. EQUIPMENT- MODEL 'Be SERIES-CIRCUIT-3R-E*- ELEMENTARY WiRiNG DIAGRAM.
BU. SHIPS ALAN NO. FS-567-305 IN. 1.0. N.Y. PLAN NO. 51543,1
3. TYPE PLAN -METHOD OF INSTALLING AND PROTECTING RD161U SOLID DIELECTRIC
CABLE- au. SNIPS PLAN NO. S6700-30650.
6.TYPE PLAN -RADAR REPEATER SYSTEM-DISTRIBUTION SWITCHBOARD TYPE -CIRCUIT
17-ER-- ELEMENTARY WIRING MORAN BU. SHIPS PLAN NO. S6705-495285.
2 TYPE PLAN- LF.F. EQUIPMENT mw0- MODEL '220" SERIES wiTH 1.F.F. CONTROL UNIT -
CIRCUIT .30--E1r- ELEMENTARY WIRING DIAGRAM- ON SHIPS PLAN NO. 6004.3595?79
AUTHORITY
BUSHIPS RESTRICTED LETTER 567-5(96tC?1 SERIAL R-912-272 OF 10 MAY 1944.
;?-,_=_IR-ER102
IR-ER31
E 1 10
.02
NO3
65
66
67
}ROTSH
SERVO
}CONTROL 'GENERATOR
FIELD
CAY-211192
}SERVO
OUTPUT
Figure 3-25. Master Interconnection Diagram
3-47
3-48
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Figure 3-25. Master interconnection Diagram
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND
INITIAL ADJUSTMENT
GLAND
NUT
ARMOR
WASHER
LOCKING
RING
PACKING
WASHER
PACKING
?.....
---
(v.,e,ft40,1:0401,Vre--00=~-
*t. -4''')'-e-t-'*Zt
GLAND NUT ARMOR WASHER
CABLE ?
LOCKING RINGS
WvVvvv?
VINYL
GROUNDING WASHER
PACKING WASHER
PACKING
FIG. I
OW6.7416391
ORIGINAL
DIELECTRIC
CD
LOCK ING
RING
GROUNDING
WASHER
PLACE GLAND NUT AND ARMOR WASHER ON CABLE.
CUT OFF ARMOR APPROXIMATELY I I/4 INCHES AS SHOWN.
PUSH ARMOR, GLAND NUT, ARMOR WASHER BACK OUT OF
' WAY. PLACE LOCKING RING, PACKING WAGNER, PACKING,
ANOTHER LOCKING RING AND GROUNDING WASHER ON
VINYL.
CUT VINYL INSULATION BACK 2 11/16 INCHES AS SHOWN,
AND FAN BACK BRAID, EXPOSING DIELECTRIC.
REFER TO FIG. 5
IF INNER CONDUCTOR IS HOLLOW. ALTER AS FOLLOWS
TO ALLOW INNER CONDUCTOR TO BE THREADED.
1 &
SILVER SOLDER PLUG."'"
IN END OF CONDUCTOR
AND THREAD PLUG
JOINT MUST BE SMOOTH
AND FREE FROM EXCESS
SOLDER

RING WASHER
SHELL
SEALING RUBBERADAPTER
NAVSHIPS 900,946
7IWIVW/Vs*
TRIMMED BRAID
A01
z
\".INNER
CONDUCTOR
IGNITION
SEALING
COMPOUND
SEALING RING
RUBBER WASHER
ADAPTER SHELL
INSULATOR
INSULATOR CONNECTOR
SECTION 3
CONNECTOR
CUT THRU DIELECTRIC TO INNER CONDUCTOR I 9/16 INCHES
FROM END. USING I/4 -20 DIE, THREAD INNER CONDUCTOR
FOR LENGTH OF 3/4 INCH AS SHOWN. CLEAN THREADED
END THOROUGHLY.
SEE FIG. 0 FOR HOLLOW INNER CONDUCTOR
PLACE SEALING RING, AND STRETCH RUBBER WASHER OVER
DIELECTRIC TO DIMENSION SHOWN, THEN TRIM BRAID TO
DIAMETER OF SEALING RING. APPLY DOW CORNING IGNITION
SEALING COMPOUND TO END OF DIELECTRIC.
INSERT END OF CABLE INTO REDUCER ADAPTER. PLACE
GROUNDING WASHER NEXT TO BRAID, THEN SCREW LOCK-
ING RING AGAINST WASHER, BUT NOT TIGHT. APPLY SEAL-
ING COMPOUND TO INNER SURFACE OF INSULATOR AND A-
ROUND PORTION OF CONNECTOR WHICH FITS INTO INSULA-
TOR.
BUTT THE POLYETHYLENE INSULATOR OVER THE END OF THE
DIELECTRIC, AND SCREW CONNECTOR ONTO THE THREADED
END OF INNER CONDUCTOR UNTIL TIGHT. TIGHTEN LOCKING
RING FOR THE BRAID, USING SPANNER WRENCH SHOWN IN FIG.
I. PUSH IN PACKING AND NEXT WASHER DOWN THRU THREAD-
ED PART OF ADAPTER. DRAW UP NEXT LOCKING RING 5045
TO SPREAD THE PACKING. FLARE OUT ARMOR AGAINST LOCK-
ING RING. SLIDE LAST WASHER AGAINST FLARED ARMOR,
AND SECURE BY TIGHTENING GLAND NUT.
Figure 3-26. R.F. Cable, Type RG-20/U, Assembly Diagram
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
3-49
3-50
INSTALLATION AND
. INITIAL ADJUSTMENT
ORIGINAL
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
NAVSHIPS 900,946
NUT
OUTER SLEEVE
OUTER SLEEVE
CUT SHARP AND EVEN
VINYL JACKET----OUTER BRAID
INNER SLEEVE RUBBER WASHER
CONTACT PIN
I.
INNER INSULATION
CUT OFF I/2"
TAPERED OUTER BRAID
^
INNER SLEEVE
INNER SLEEVE IN PLACE
UNDER VINYL JACKET
NOTE NICK
1-7
L.
16
APPROX.
A.CUT END OF CABLE EVEN
B. SLIDE THE OUTER SLEEVE AND
THE NUT OVER CABLE
CUT OFF VINYL JACKET I I/2"
0 FROM END OF CABLE EXPOSING
BRAID AND BEING CAREFUL NOT
TO NICK BRAID
A. FAN OUT BRAID
?
B.CUT OFF INSULATION AND CENTER
CONDUCTOR 1/2" SO AS TO LEAVE
SHARP END
0 TAPER END OF BRAID (AS SHOWN)
SO THAT INNER SLEEVE MAY BE
SLIPPED OVER BRAID AND UNDER
SLIDE INNER SLEEVE OVER
TAPERED BRAID AND FORCE
UNDER OUTER VINYL JACKET
Q6 WITH INNER SLEEVE IN PLACE
CUT BRAID APPROXIMATELY 3/16"
OFOLD BRAID BACK OVER INNER
SLEEVE AND SMOOTH
CONNECTOR ASSEMBLY
CENTER CONDUCTOR
INSULATION
I"
4 3..
44? 16
APPROX,
CONTACT PIN
INNER SLEEVE
RUBBER WASHER
etwiz
MN
NOTE: IF CABLE IS ARMORED TERMINATE
ARMOR AT APPROXIMATELY THIS
POINT AND FASTEN WITH TAPE OR
ANY OTHER SUITABLE MEANS.
SECTION 3
A. CUT INNER INSULATION APPROX. 1/4"
MEASURING FROM INNER SLEEVE
CI B. REMOVE INNER INSULATION LEAVING 3/16"
CENTER CONDUCTOR EXPOSED
C. TIN CENTER CONDUCTOR
A. HOLD CONTACT PIN WITH PLIERS
0 B. FILL HOLE WITH SOLDER
C. TIN CENTER CONDUCTOR AND INSERT INTO PIN
A. REMOVE EXCESS SOLDER
K.--1 B. SLIP RUBBER WASHER OVER INNER SLEEVE (AS SHOWN)
SLIDE OUTER SLEEVE "A" AND NUT "B" AS CLOSE
8 AS POSSIBLE IN PREPARATION FOR RECEIVING
CONNECTOR ASSEMBLY
CONNECTOR ASSEMBLY (ILLUSTRATED)
A. SLIDE CABLE INTO CONNECTOR ASSEMBLY
0 B. SCREW NUT IN PLACE WITH A WRENCH
DO NOT TURN CONNECTOR WHILE TIGHTENING
NUT AS THIS TWISTS THE RUBBER WASHER
AND MAKES THE CONNECTOR OR JACK
NON WATERPROOF
COMPLETED ASSEMBLY SHOWN IN SECTION
Figure 3-27. R.F. Connector, Type UG-21/U Assembly to R.F. Cable,
Type RG-10/U or RG-12/U
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND
INITIAL ADJUSTMENT
?
fE
J
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
NAVSHIPS 900,946
CLAMPING NUT
FRICTION TAPE
4"
BUSHING
ORIGINAL
WASHER
SLIP CLAMPING NUT AND
CABLE BUSHING OVER CABLE.
WRAP TAPE AROUND CABLE.
REMOVE ARMOR TO POINT SHOWN.
BEND AND UNWEAVE ARMOR
AT RIGHT ANGLES TO TAPE.
REMOVE NEOPRENE SHEATH
TO ARMOR. REMOVE TAPE.
SLIDE BUSHING AGAINST
ARMOR AND TRIM FLUSH
WITH EDGE OF BUSHING.
REMOVE CLOTH FROM
COPPER BRAID TO ARMOR.
SLIDE BRASS WASHER OVER
COPPER BRAID TO ARMOR.
REMOVE TINNED COPPER
BRAID AS SHOWN.
-
CONE
PLUG
cIIco)
SOLDER
8
SOLDER
?
SECTION 3
REMOVE CONDUCTING RUBBER AS SHOWN.
TRIM EVENLY TO DIMENSION SHOWN.
SLIDE BRASS CONE OVER CONDUCTING RUBBER
AND UNDER COPPER BRAID. CONE SHOULD ENTER
WASHER TO A DEPTH OF 1/16 INCH.
3'
10 WRAP COPPER BRAID WITH WIRE AND
SOLDER TO CONE AND WASHER.
REMOVE INSULATING RUBBER AND
TAPER AS SHOWN.
TIN
REMOVE NICKEL PLATING FROM GROOVE AT
BACK OF PLUG,INSERT CABLE,SLIDE BUSHING
BACK AND SOLDER WASHER INTO GROOVE OF
PLUG.
SMOOTH SOLDER
WITH FILE
SLIDE BUSHING AGAINST WASHER,SCREW BACK NUT
SECURELY IN PLACE WITH SPANNER WRENCH.
SOLDER CENTER CONDUCTOR BRASS SLEEVE AT
FRONT END OF PLUG AND REMOVE EXCESS CON-
DUCTOR AND SOLDER. REMOVE PLUGS AND FILL
WITH COMPOUND USING GREASE GUN.
FILL WITH DOW CORNING No.4
IGNITION SEALING COMPOUND, ,
USING 10-32 ADAPTOR -ON GUN.
Figure 3-28. R.F. Connector, Type UG-36/U Assembly to R.F. Cable,
Type RG-27/U
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
3-53
3-54
-n
3
CD
1.4
.45
COUPLING
FLANGE
1:1
MALE
RECEPTACLE
FEMALE MALE COUPLING
RtCEPTACLE CONTACT PIN FLANGE
1=:1
50 OHM PIN
TAPPED UNTAPPED
EQUIPMENT
COUPLING FLANGE
STRAIGHT a EVEN RECESS
?78:GAS FILLED COAXIAL LINE
SOLDER NEATLY
FEMALE RECEPTACLE
GASKET
I.
RECESS FLUSH
COUPLING FLANGE
^
SOLDER
?8 -GAS LINE
LOCK SCREWS
WASHERS
STEP OPERATION
I A- CLEAN AND TIN INSIDE OF CENTER CONDUCTOR.
B-PROPERLY PLACE COUPLING FLANGE ON GAS LINE.
2 INSERT PROPER MALE CONTACT PIN INTO CENTER CONDUCTOR OF
GAS LINE AND SOLDER NEATLY. DO NOT HEAT EXCESSIVELY. WIPE OFF
EXCESS SOLDER LEAVING A SMOOTH FINISH.
GASKET
3 A-INSERT FEMALE RECEPTACLE OVER GAS LINE TO SHOULDER AND SOLDER
NEATLY. BE SURE SOLDERING JOINT IS AIR-TIGHT. WIPE OFF EXCESS SOLDER
INSIDE OF GAS LINE LEAVING A SMOOTH FINISH.
B- SPREAD SECTIONS OF MALE CONTACT PIN (BULLET) TO INSURE GOOD CONTACT
MAKE SURE THAT GASKET IS IN PLACE.
4 A-BRING COUPLING FLANGES TOGETHER AND SECURE, USING THE PROVIDED
LOCKWASHERS AND SC.REWS.
B-IF EXCESSIVE VIBRATION IS ANTICIPATED, TAPE COUPLING NUT OF UG-211U
(OR EQUIVALENT CONNECTOR) TO UG-32/U OR UG-33/U END SEAL TO PREVENT LOOSENING.
C-DO NOT INSTALL IN ANY POSITION WHERE TEMPERATURE MAY EXCEED 160? F.
1 -r-if(rtr1 --1
olio i
_ -1
ARMY NAVY TYPE UG-2I/U
OR EQUIVALENT. PLUG
FROM IFF TRANSMITTER
COMPLETED ASSEMBLY
SHOWN IN SECTIONS
1N3WallraV 1VIIINI
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Figure 3-29. R.F. Connector, Type UG-32/U Assembly to IFF Transmission Line
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND NAVSHIPS 900,946 SECTION 2
Par. 16b(2)
INITIAL
ADJUSTMENT
Figure 3-30. Pedestal Connection of IFF and
Radar Transmission Cables
(2) Three low power r-f cables connect to the
Transceiver. They are used to conduct i-f energy from
the Monitor Receiver to the Console Receiver; to con-
duct r-f energy from the Echo Box Antenna to the
Echo Box; and to conduct the Sync pulse from the
Transceiver to the Indicator Console. These cables
connect to three type UG-22/U jacks located on a
panel behind the door in the lower left-hand corner of
the Unit. These cables are brought into the terminal
compartment of the Transceiver through an access
hole provided in the floor of the unit, adjacent to the
terminal area. The method of connecting the UG-21/U
connectors to the type RG-10/U or RG-12/U coaxial
cables is shown in Fig. 3-27.
(3) Several a-c cables are brought into the Trans-
ceiver. They provide power to the Transceiver, and
also operate circuits in the other units which are con-
trolled from the Transceiver. See Fig. 3-25. The
wires of these cables are connected to the terminal
blocks in the compartment behind the door in the
lower left-hand corner of the unit. The cables are
brought into the Transceiver through the same access
hole as in the case of the lower power r-f cables. Sol-
dering lugs should be fastened to each wire of the
cables.
( 4 ) If the Keyer unit is being used with the SR
Transceiver, the foregoing three paragraphs have con-
sidered all the connections to the Transceiver. If, the
equipment has been modified into the SR-a by the
addition of the Modulator, it will be necessary to make
three additional connections 'to the Transceiver. These
ORIGINAL
connections consist of two high-voltage pulse cables
and one low-voltage a-c cable. The pulse cables are
each made of type RG-27/U armored coaxial cable.
The two ends of each cable are terminated in type
UG-36/U connectors. The connectors on the pulse
lines are fastened to the connectors on the terminal
panel located in what was originally the Keyer com-
partment of the Transceiver. This terminal panel was
installed when the equipment was converted from the
SR to the SR-a, as was described in previous paragraphs
of this section. Access to the terminal panel is gained
through a rectangular opening cut in the right-hand
shield of the Transceiver, adjacent to the keyer com-
partment. In order to install the Modulator a-c cable
to the terminal panel in the Transceiver, it is necessary
to drill a hole in the vertical side member of the ter-
minal panel, of the proper diameter to hold a stuffing
tube, through which the cable should be inserted. The
stuffing tube, when tightened, will prevent a strain
being placed upon the terminals. The pulse cables,
a-c cable, and stuffing tube are shown in Fig. 3-1.
The method of connecting the type UG-36/U con-
nectors to the type RG-27/U armored cable is shown
in Fig. 3-28. Soldering lugs should be placed on all
low voltage a-c wires.
c. MODULATOR.
(1) The Transceiver end of the connections be-
tween the Transceiver and the Modulator have been
discussed in the previous paragraph. The junction
box of the Modulator is installed on the upper left
end of the unit. It may be installed with the connec-
tors facing either up or down, as may be desired when
running the interconnection cables. The connectors
are to be installed on the cable as described in the
previous paragraph. To fasten them to the connectors
in the junction box of the Modulator it is only neces-
sary to place the two together and tighten the retain-
ing nut. It is necessary to drill a hole in the junction
box and install a stuffing tube through which the a-c
cable may enter the Modulator. The location of this
stuffing tube may be any place in the junction box on
the opposite side of the red line from the armored
high voltage leads.
d. INDICATOR CONSOLE.
(1) The cables from the Transmitter and Rota-
tion Control Unit as well as the a-c line and the con-
nections to the other components of the radar equip-
ment, may be brought into the Indicator Console in
a number of different ways. Junction boxes are pro-
vided which may be mounted on the back of the
equipment or on the sides. Five separate positions
are provided for the junction boxes. They may be on
either side of the Console, or on the back of either
of the three cabinets. Three junction boxes are pro-
vided, and six cover plates are supplied to close up
the holes not being used in the event the three units
are installed separately. The Console is delivered with
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
3-57
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
2 SECTION NAVSHIPS 900,946 INSTALLATION AND
*/ Par. 16d(1) INITIAL ADJUSTMENT
the three junction boxes "mounted in the rear, a cover
plate on each side and the other four cover plates
packed separately.
(2) Locate the junction boxes at points most con-
venient for theiparticular installation. These locations
depend upon the location of the cables from the radar
equipment. Also, the installation crew should take
into consideration that the cables must be installed so
as to allow a loop to permit freedom of movement on
the rubber shockmounts. Drill or punch the holes in
the junction boxes for the stuffing tubes which bring
in the armored cables. Loop the armored cables up to
the junction box if at all possible. This loop is pro-
vided to prevent the cable from breaking under vibra-
tion and shock. Bring the cable only as far as the
junction box. Then feed the free ends of the wires
into the top of the cases through the oval-shaped slots.
Connect the wires according to the connection diagram
in Fig. 3-25. Cut off the wire ends to appropriate
lengths. Solder terminals on the wires and connect
them to their respective points on the terminal boards.
Since the Indicator Console is supplied as a unit by
the manufacturer, the diagrams showing interconnec-
tion between the three units of the Console are not
necessary in the installation of the Console.
(3) It is necessary to terminate both the video
and the trigger lines in a resistance of 68 ohms. When
only the Console PPI Indicator is used, the method of
accomplishing the proper termination will be as de-
scribed in this paragraph. If remote indicators are
used in addition to the Console PPI, they should be
connected as described in Par. 16r of this section.
If no remote indicators are used, connect terminals
285D and 285C to 01, on terminal board E-1004 in
the top of the lefthand frame above the Console
Receiver. Place switch S-1008, in its TERMINATE
position. This switch is located in the top of the
center frame above the PPI Indicator. This connection
will terminate both the video and trigger lines in the
proper impedance.
e. ANTENNA AND ANTENNA PEDESTAL.
(1) Three types of connections are made to the
Antenna Pedestal. They are the cable from the radar
Transmitter, the cable from the IFF Transmitter; and
the connections for controlling rotation of the An-
tenna. The connector on the Antenna end of the
cable from the Transceiver is equipped with the same
type of connector used on the Transceiver end of the
cable. The Pedestal connector into which the cable
connector fits is the same type as the one on the
duplexer of the Transceiver. The connection at the
Pedestal end of the cable is made in the way described
for the duplexer in the Transceiver. Push the cable
connector into the Pedestal connector, and secure it
by means of two machine screws, which fit into tapped
holes in the Pedestal connector.
3-58
(2) The connection of the type RG-10 ,U trans-
mission line from the IFF transmitter to the IFF co-
axial line of the Antenna Pedestal is made through
the use of a type UG-32/U connector. Fasten the con-
nector to the IFF coaxial line in the Pedestal as shown
in Fig. 3-29. After the type UG-32 /U connector has
been fastened to the coaxial line, it is necessary to
screw the plug on the end of the IFF Transmission
line to the threaded jack on the end of the UG-32 /U
connector. The plug on the end of the IFF transmis-
sion line will be a type UG-21,U or its equivalent.
(3) The circuits which control the rotation of
the Antenna are brought into the Pedestal through
the power inlet entrance adjacent to the radar cable
elbow connector. Install a stuffing tube in the opening
shown. Some of the Pedestals were tapped at the
factory to accommodate the stuffing tube. If the
Pedestal being installed is not tapped, it will be neces-
sary to do so before the stuffing tube can be installed.
Fasten soldering lugs on the wires of the cable and
connect to the appropriate terminals of the terminal
panel, located behind the terminal panel access door.
These terminals are shown in Fig. 3-25.
f. ECHO BOX ANTENNA.
(1) A type RG-10/U coaxial cable is used as the
transmission line between the Echo Box Antenna and
the Transceiver. The same type of connector is used
at both ends of the cable. This connector is a type
UG-21/U, and it should be fastened to the cable as
directed in Fig. 3-27. The transmission cable should
be firmly clamped to some rigid support at frequent
intervals in order to prevent damage to the cable.
g. SYNCHRO AMPLIFIER.
(1) The method of interconnection between the
two units of the Synchro Amplifier is shown in Fig.
3-25. Connections are made to the Synchro Unit
through five stuffing tubes which are located on the
walls of the terminal compartment at the top of the
unit, as it is mounted on the bulkhead. Connections
to the Electronic Unit are made through one stuffing
tube, which may be located on either of three sides
of the amplifier case. The unused openings on the
two sides not used for the stuffing tube are closed with
plates provided for that purpose.
(2) Three connections are made to the Synchro
Unit. One of these brings information to the unit
from the ship's gyro-compass. The second intercon-
nects the Electronic Unit with the Synchro Unit, and
the third conducts relayed compass data from the
Synchro Amplifier to the components of the SR sys-
tem. Bring the cables into the most convenient of
the five available stuffing tubes of the Synchro Unit.
In order to gain access to the terminal boards, loosen
the screws holding the cover of the terminal compart-
ment and swing the cover back. Remove the armor
from the connecting cables and make connections as
ORIGINAL
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND NAVSHIPS 900,946 SECTION 2
INITIAL ADJUSTMENT Par. 16g(2)
rcquired to the terminals. Use soldering lugs on the
wires of the cables for connection to the terminals.
To gain access to the terminals of the Electronic Unit,
remove the screws holding the cover of the unit, and
swing open the hinged door. The terminal strip is
located on the wall of the unit adjacent to the cover
hinge. Remove the armor of the cable and make con-
nections as in the case of the Electronic Unit.
(3) Care should be taken during installation not
to expose the mechanism of the Synchro Unit to dust
or dirt. A tray is provided in the bottom of the ter-
minal compartment to prevent insulation chips from
the cables from falling into the mechanism. Remove
these chips after the cable ,connections have been
completed.
NOTE
DO NOT CONNECT TO THE SYNCHRO
AMPLIFIER EITHER SYNCHRO DIFFER-
ENTIALS OR CONTROL TRANSFORM-
ERS UNLESS THEY HAVE BEEN COM-
PENSATED WITH THE PROPER VALUE
OF CAPACITORS. NEGLECT OF THIS
PRECAUTION MAY CAUSE INACCU-
RACY IN THE SYNCHRO AMPLIFIER.
h. ROTATION CONTROL UNIT.
(1) Connections are brought into the Rotation
Control Unit through a junction box of the same type
as the ones used on the Indicator Console. This box
may be located on the back of the case or on either
side, depending upon which is the most convenient.
Plates are provided for covering the entrance holes
in the case on the two sides not used for the junction
box. The armored cable may be brought into the
junction box from the top, bottom, or either side.
Select the proper location for the entering cables, and
drill holes for stuffing tubes. Remove the armor from
the cables at the junction box and allow three feet of
wire for connection to the terminal boards on the top
of the case. Use soldering lugs on the ends of all
wires. When installing, leave sufficient slack in the
cables to permit the unit to move on its shockmount.
The connections to the terminal boards are shown in
Fig. 3-25.
i. SERVO GENERATOR.
(1) Connections to the Servo Generator are made
on a terminal board located on the right side of the
unit, facing the motor. The terminal board is pro-
tected by a metal cover retained by six screws. This
cover may be removed to permit access to the termi-
nals. Install a stuffing tube in the tapped hole in the
end of the casting which supports the protective cover.
Bring the cable into the compartment through the
stuffing tube, remove the armor, and connect the wires
to the terminals by means of soldering lugs. See
Fig. 3-25.
j. VOLTAGE STABILIZER.
( 1) Access to the terminals of the Voltage Stabi-
lizer is gained through a removable plate screwed to
ORIGINAL
Declassified and Approved For Release 2013/11/21
the top of the case. Two knockout openings are pro-
vided in the end of the case adjacent to the terminals.
Select either of these holes, depending upon which is
most conveniently located to the cable which must be
brought to the terminals. Install a stuffing tube and
bring the cable into the case. Remove the armor, and
connect the wires to the terminals, using soldering
lugs. The connections are shown in Fig. 3-25.
k. MOTOR GENERATOR.
( 1) Conduit boxes are provided on the motor,
generator, and exciter for connection to the SR system.
The boxes on the exciter and generator are provided
with knockout openings for the entrance of the cables.
Holes for stuffing tubes on the box on the motor must
be drilled by the customer. Connection to the cen-
trifugal switch on the shaft of the motor is made
through holes in its case. Select the proper holes in
each case, and install stuffing tubes. Make all con-
nections by soldering terminals of sufficient current-
carrying capacity to the wires of the cables. See
Fig. 3-25.
/. VOLTAGE REGULATOR.
(1) To bring the connecting cables into the
Voltage Regulator, drill holes and install stuffing tubes
in the removable plate covering the opening in the
top of the case. Bring the cables into the unit, and
connect the wires to the terminal board adjacent to
the opening in the top. The connections are shown
in Fig. 3-25.
nz. MAGNETIC CONTROLLER.
(1) Connections are made to the Magnetic Con-
troller through metal plates covering openings in both
the top and bottom of the case. Drill holes in the
plates and install stuffing tubes as required. When
making connections, be certain that terminals with
sufficient current-carrying capacity are soldered to the
wires. See Fig. 3-25 for the necessary wiring informa-
tion.
n. PUSHBUTTON STATION.
(1) Remove the front cover plate of this unit to
expose the terminals, and install a stuffing tube in the
hole on each end of the unit. Bring the cables into
each end of the unit, and connect as required, using
soldering lugs on the wires of the cables. See Fig. 3-25.
o. CONTROLLER DISCONNECT LINE SWITCH.
(1) Install stuffing tubes in the top and bottom
of this unit as required, and bring the cables inside
the case. Connect the wires of the cables to the ter-
minals, making certain that terminals of sufficient cur-
rent-carrying capacity are used on the wires of the
cables.
p. CONNECTIONS TO IFF SYSTEM.
(1) The connections to the IFF equipment asso-
ciated with the SR system are made to terminal boards
located in the top of the left-hand case of the Indicator
Console. Cables for the control circuits are connected
: CIA-RDP67B00341R000800090001-3
3-59
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
2 SECTION
*1 Par. 16p(1)
NAVSH IPS
to terminal board E-1003; that for the trigger pulse
to the IFF transmitter is connected to E-1004. The
type of cables to be used is as specified in the installa-
tion instructions of the particular IFF equipment.
q. IFF VIDEO TO REMOTE PPI INDICATORS.
(1) The Indicator Console is interconnected be-
fore delivery so that IFF indications will appear on
the Range Scope only. The diagrams show this type
of connection. Should IFF video responses be desired
on the PPI indicators, place a jumper across both
terminals 82 on terminal board E-1005.
r. CONNECTION OF REMOTE PPI INDICATORS.
(1) Provisions are made in the Indicator Console
for supplying a trigger pulse and video signals to four
chains of remotely located PPI units. These two
signals are supplied to the remote indicators from the
terminal boards in the top of the left hand case in
the Console. Synchro data and synchro excitation
voltage for the synchro system in the remote units are
supplied directly from the Rotation Control Unit. The
PPI Scope in the Console is connected similarly to
the remote indicators. However, its synchro data does
not go Through the remote disconnect switch on the
Rotation Control Unit. As a result, the PPI Scope
in the Console will not be cut off from the synchro
line when the synchro circuit to the remote PPI indi-
cators is opened by the remote disconnect switch.
(2) The primary source of the 1-speed synchro
data signal is at terminals 57, 58 and 59. These ter-
minals are connected to similarly numbered terminals
on the PPI Scope. Terminals 96 and 97 carry O.S.C.
excitation. Wire 74 conveys the relative bearing indi-
cator light information. All of these wires are con-
nected from the Rotation Control Unit to the PPI
Scope through the Bearing Indicator.
(3) Inside the Rotation Control Unit, the wires
to 57, 58, 59, 96 and 97 are connected through the
remote disconnect switch to become 157, 158, 159, 196
and 197. When the disconnect switch is closed, the
information becomes the same on both sets of ter-
minals. When the switch is open, no voltage exists on
terminals 157, 158, 159, 196 and 197. Adjacent sets of
terminals bear the same number in the Rotation Con-
trol Unit. They are connected in parallel inside the
unit. There will be two 157's, two 158's, etc. By
connecting two wires to each of the two similar ter-
minals, it will be possible to connect four lines to the
terminals for supplying four groups of remote PPI
indicators. It is permissible to connect three remote
PPI units to each of these four lines, making a total
of twelve remote units in all. The PPI Indicator in
the Console must be intluded in the total of 12 PPI
units. ?
(4) A similar set of 36-speed synchro data ter-
minals are provided. These are 160, 161, and 162 for
the data voltages and 196 and 197 for the O.S.C. exci-
3-60
900,946 INSTALLATION AND
INITIAL ADJUSTMENT
tation. These wires have also passed through the
remote disconnect switch. By doubling up on these
terminals, four lines may be connected to them also,
with a limitation of three indicators per line. Accord-
ingly, it is possible to supply voltages for twelve indi-
cators requiring 1-speed data, twelve indicators requir-
ing 36-speed data, or twelve indicators requiring a
combination of both. This includes the requirements
of the PPI Indicator in the Console.
(5) Four channels are provided for the video
signals. Each of these is supplied by one of the cath-
ode followers in the Console Receiver. These outputs
appear on the 180 series of terminals in the left-hand
Console Unit. Terminal 180A is the output of the
first cathode follower and it is connected directly to
the video input to the PPI Indicator in the Console
Receiver. The equipment is designed to handle three
remote PPI units on each of the four outputs, 180A,
180B, 180C and 180D. It must be remembered that
one of these outputs is already in use by the PPI
Indicator in the Console. When using this output
only two additional units may be placed on this line.
Convenient parallel terminations on the PPI scope are
included to make these connections possible.
(6) In a similar manner, 285A is the terminal on
the PPI frame from which the trigger pulse is ob-
tained for the first chain of indicators. The PPI Indi-
cator in the Console is connected to it. From there,
two additional remote units may be coupled in parallel
with the Console PPI. Three or less units in parallel
may also be connected to each of the terminals 285B,
285C, and 285D.
(7) To summarize, a total of eleven remote indi-
cators in addition to the Console PPI Indicator, may
be connected to the SR system. The video signal for
each of these indicators is obtained from the 180 series
of terminals; the trigger signal is obtained from the
285 series of terminals. A total of three indicators
may be connected in parallel to the "A" branch of
trigger and video lines; three to the "B" branch, three
to the "C" branch, and three to the "D" branch.
(8) In order to properly terminate the video and
trigger lines, two procedures are necessary. These
involve the BRIDGE-TERMINATE switches on the
remote indicators, and the connections to terminal
board E-1003 in the Indicator Console Case. First,
make the connections required at terminal board
E-1003 as shown in Fig. 3-31. Two additional indi-
cators may be connected to the same branch of trigger
and video circuits with the PPI Indicator in the Con-
sole. To properly terminate the lines under this condi-
tion, change the BRIDGE-TERMINATE switch on
the Console PPI from the TERMINATE position to
the BRIDGE position. If a second branch of trigger
and video circuits is used; that is, if from four to six
indicators in all are connected, connections will be
ORIGINAL
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
? INSTALLATION AND
. INITIAL ADJUSTMENT
ORIGINAL
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
NAVSHIPS 900,946
200100-400
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0 MA 000 coor-Nos-A-IN wow ? W-0 w 0
0 m 01??-ou Dow -111.--.0 51 0
06350 MT-: Gtonaw-sto 11007.
0 .0 ?,/-A0 0)1974100-0 64 0
0 mo 0.-00t210011-813014000003.5030 503 0
0 610 0131111t6118?03111003-306-.0 606 0
500
650
3505
BPL SCOPE
(MONT)
EX,/
(4.00 710000 000 BARE 80111
00 4120 10014)500 CARLE
(V) 660175 61511 74.40.
(83.0194)110050000
?tommonm qt4.5111/11 (50 0001
FRAME 2
SECTION 3
?1000
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Wry ERN - AS-0 /3 0
- .550
eon ?/530 3201
wf um- IN---0 SiI 0
740
OM E. - 76
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Pt 150l- 40------0 63 0
I ? 03/ MS ? 42-0 6/ 0
w ma ? ft-ED .8 0
IN Eta, 00--0 oo 0
? mmo.m.
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302 0
O0
O 0
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((0005)
(NW) 00.?0-30,
caw ? 0.1093 2400
0
? elo to- 0?0 03 0
.0.0? 1l00 .os-C
Ss-01 VERO ? 302-.40 303 0
E 601
(,))40:
0500
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0 0
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RANGE SCOPE
O 0
O 0
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0 133
0 252
0 13)
0 .2
0 61
00.0
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034.
0 3/ /
/006 ?
07,1
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CMOS ? 6.1-4*4-101 1003 -90
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20E1001- 40 ....7.011/11 12004- 51
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MOS ? .se--7.
no. ? 07?71.......-161 flaw 74
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now ?302-"--,A) 130007
-
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BEARING INDICATOR
(WNW)
030
00
00'0 .,
05
E 003
0
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o o
O 0
O 0
? 3, 0
SG 0
0.40
? as 0
O 0
E SC4
00 12011 ? 00-7.
'DO DEW
VOW
FRAME 3
Figure 3-31. Indicator Console, Frame Wiring Diagram
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3-62
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INSTALLATION AND NAVSHIPS 900,946 SECTION 3
INITIAL ADJUSTMENT
W
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Figure 3-32. RG-12/U Coaxial Cable, Assembly of Connecting Lugs
ORIGINAL
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NAVSHIPS 900,946 INSTALLATION AND
INITIAL ADJUSTMENT
al SECTION
Par.16r(8)
to the "B" series of lines. In this case, it will be
necessary to connect the 285D terminal of terminal
board E-1003 to the 01 terminal. If a third, or "C"
series of lines is used, it will be necessary to connect
terminal 285C to 285D. If the fourth, or "D" series
of lines be used, connecting from ten to twelve indi-
cators, no jumpers are necessary on terminal board
E-1003. The second procedure necessary to terminate
the indicators is to throw the BRIDGE-TERMINATE
switch on the last unit on each line to the TERMI-
NATE position. The switches on all other units on
that line should be in the BRIDGE position.
(9) The cables carrying the trigger and video
signals are of the RG-12/U type. This is a coaxial
cable, which must be connected to the terminal boards
on the cases of the Indicator Console and the remote
indicators. Connection is made by fastening soldering
lugs on both the ground braid and the center conduc-
tor of the cable. Instructions for soldering these lugs
are given in Fig. 3-32.
s. WIRE NUMBER DESIGNATIONS.
(1) Table 3-1 indicates the designations of the
various terminals of the SR system. These designa-
tions are useful for connecting the equipment. They
are also helpful when testing or trouble-shooting the
equipment. The terminal numbering system is ar-
ranged so that all terminals of one unit are connected
to similarly numbered terminals on another unit. In
addition, all terminals having similar functions have
the last two numbers. For example, the 115 volt a-c
lines have the last two numbers 02 and 03. Terminals
102 and 103 are the a-c connections to the Transceiver,
terminals 302 and 303 are the a-c terminals of the
Console, etc. All terminals ending in 02 and 03 will
carry a-c primary power. This will be noted in the
complete listing of terminals which follows.
TABLE 3-1
WIRE NUMBER DESIGNATIONS
TERMINAL
01
FUNCTION
GROUND
SHIP'S HEAD MARKER GROUND
02-03 115 V. A-C MAINS AND HEATER
INPUT
102-103 115 V.A.C. TRANSCEIVER OUTPUT
203 INTERLOCK (ROTATION CON-
TROL UNIT)
302-303 115 V.A.C. THROUGH CONSOLE
SWITCH
403 INTERLOCK (CONSOLE RECEIVER
GENERAL CONTROL?IFF CO-
ORDINATOR)
503 INTERLOCK (PPI)
603 INTERLOCK BEARING INDICATOR
?RANGE SCOPE
702-703 TO HEATER AND PLUGS THROUGH
CIRCUIT BREAKER
3-64
802-803 MOTOR DRIVE ON SERVO GENER-
ATOR SET
1202-1203 115 V.A.C.?OUTPUT FROM VOLT-
AGE STABILIZER
2202-2203 115 V.A.C. INPUT TO VOLTAGE
STABILIZER
04 COMMON LINE FOR CONTROL IN-
DICATOR LAMP VOLTAGES
05 "TRANSMITTER ON"?PILOT
LIGHT
06 "LOCAL CONTROL"?PILOT LIGHT
07 POWER COMMON
08 POWER?ON
09 POWER?OFF
12 PLATE VOLTS?LOWER
13 PLATE VOLTS?COMMON
14 PLATE VOLTS?RAISE
15-16 SYNCHRONIZING TRIGGER PULSE
INPUT
18 TRANSMITTER KEY
19 KV METER LEAD
20 ECHO BOX REMOTE SWITCH
(COMMON)
120 ECHO BOX REMOTE SWITCH
(REMOTE)
22 REMOTE KEYER CONTROL?
COMMON
23 REMOTE KEYER CONTROL?SHARP
24 REMOTE KEYER CONTROL?
MEDIUM
25 REMOTE KEYER CONTROL?
BROAD
26 KEYER (INTERNAL)
28 MONITOR GAIN?COMMON
(BEFORE SWITCH)
128 MONITOR GAIN?LOCAL (AFTER
SWITCH)
228 MONITOR GAIN?REMOTE (AFTER
SWITCH)
30 KEYER TRIGGER
31 KEYER TRIGGER
32 KEYER GRID RETURN
35-36 INTERLOCK (KEYER)
47 TIE POINT RCU (INTERNAL)
48 115 V. FOR O.S.C. EXCITATION
CONTACTS (INTERNAL?R.C.U.)
49 115 V. FOR O.S.C. EXCITATION
CONTACTS (INTERNAL?R.C.U.)
50 115 V. FOR O.S.C. EXCITATION
CONTACTS (INTERNAL?R.C.U.)
51-52-53 1 X RELAYED O.S.C. SIGNAL
151-152-153 1 X RELAYED 0.S.C. OR REFERENCE
A.C. THROUGH TRUE-RELATIVE
SWITCH
54-55-56 36 X RELAYED O.S.C. SIGNAL
ORIGINAL
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INSTALLATION AND NAVSHIPS 900,946 SECTION 2
INITIAL ADJUSTMENT Par. 17a(1) '10
154-155-156
57-58-59
157-158-159
60-61-62
160-161-162
64-63
65-66-67
68-69
168-169
70-71
72
73
NOTE:
74
75
76
77-78
80
180A
180B
180C
180D
81
82
83
84
85
185
285A
285B
285C
ORIGINAL
36 X RELAYED O.S.C. OR REFER-
ENCE A.C. THROUGH TRUE-
RELATIVE SWITCH
1 X SIGNAL DATA (TRUE OR
RELATIVE) FROM 6DG
1 X SIGNAL DATA (TRUE OR RELA-
TIVE) THROUGH REMOTE DIS-
CONNECT SWITCH
36 X SIGNAL DATA (TRUE OR
RELATIVE) FROM 6DG
36 X SIGNAL DATA (TRUE OR
RELATIVE) THROUGH REMOTE
DISCONNECT SWITCH
5CT 36 X SIGNAL TO SERVO AMPLI-
FIER FROM BEARING INDICATOR
EXCITER FIELD?SERVO GENER-
ATOR
ARMATURE OF SERVO GENERATOR
ARMATURE OF ANTENNA DRIVE
MOTOR
FIELD SUPPLY OF ANTENNA
DRIVE MOTOR
EMERGENCY ANTENNA
ROTATION
NORMAL ANTENNA ROTATION j
These functions are reversed by Navy
Field Change No. 28.
PILOT LIGHT (RELATIVE)
DIAL LIGHT (TRUE)
INTERCONNECTION (R.C.U.)
TELEPHONE WIRES (ANTENNA
PEDESTAL)
RADAR VIDEO TO RANGE SCOPE
FROM RECEIVER
PPI VIDEO OUTPUT (CONSOLE)
AND TWO REMOTE PPI'S
PPI VIDEO OUTPUT TO 4 REMOTE
PPI'S
PPI VIDEO OUTPUT TO 4 REMOTE
PPI'S
PPI VIDEO OUTPUT TO 4 REMOTE
PPI'S
PPI MARKERS OUTPUT (RANGE
SCOPE TO RECEIVER)
IFF VIDEO INPUT FROM IFF
SYSTEM
RADAR BLOCK FROM IFF COORDI-
NATOR TO RANGE SCOPE
IFF BLOCK FROM IFF COORDINA-
TOR TO RANGE SCOPE
TRIGGER FROM RADAR TRANS-
MITTER
TRIGGER TO RANGE SCOPE
TRIGGER TO CONSOLE PPI
TRIGGER TO REMOTE PPI'S
TRIGGER TO REMOTE PPI'S
285D
685
785
86-87-88-92
89-90-91
94-95
96-97
196-197
802
803
TRIGGER TO REMOTE PPI'S
TRIGGER TO IFF COORDINATOR
TRIGGER TO IFF TRANSMITTER
IFF TRANSMITTER CONTROL
CIRCUITS
TO IFF RECEIVER
O.S.C. EXC. FROM O.S.C. AMPLIFIER
O.S.C. EXC. OR REFERENCE A-C TO
CONSOLE PPI
O.S.C. EXC. OR REFERENCE A-C
THROUGH REMOTE DISCON-
NECT SWITCH
A.C. TO SERVO GENERATOR
A.C. TO SERVO GENERATOR
17. INITIAL ADJUSTMENTS.
a. GENERAL.
(1) After the equipment has been installed, ad-
justments are required in nearly all of the components
before the system may be considered to be in proper
operating condition. These adjustments involve tun-
ing the Transmitter, aligning the Antenna positioning
system, and aligning the components of the Indicator
Console. The paragraphs immediately following de-
scribe the procedure required to place the equipment
in operation and the adjustments required by each
component. The procedure to be followed in turning
the equipment on depends upon the type of Modula-
tion used. The SR Transmitter, using the Keyer Unit,
requires more careful initial adjustment than the SR-a
Transmitter, using the plate Modulator. It is pre-
sumed in this discussion that the SR Transmitter being
turned on is equipped with a jack for viewing the grid
pulse of voltage. This jack has been incorporated in
the manufacture of all SR equipments above Serial
No. 69 and consists of a voltage divider connected be-
tween the oscillator grid and ground with a test jack
mounted on the front panel of the Transceiver and
connected to the low voltage point of the divider.
This connection provides approximately 5% of the
total plate voltage for application to the vertical plates
of the test oscilloscope. The addition of this jack has
been provided for equipments of serial numbers less
than 69 by Navy Field Change No. 8.
b. ADJUSTMENT -OF MOTOR-GENERATOR
VOLTAGE.
(1) Place all switches in their OFF positions.
(2) Place the Controller Disconnect Line Switch
in its ON position.
(3) Push the START button of the Pushbutton
Station. This switch energizes the relays in the Mag-
netic Controller, starting a sequence of relay opera-
tions that causes the Motor-Generator to start and
apply a-c power to the input terminals on the Trans-
ceiver.
(4) Place switch S-1461 on the Voltage Regulator
in its AUTO position.
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2 SECTION NAVSHIPS 900,946 INSTALLATION AND
10 Par. 17b(5) INITIAL ADJUSTMENT
6T-I461
Figure 3-33. Voltage Regulator, Operating Controls
(5) Place the VOLT. ADJ. RHEO. control R-1462
in the center of its range.
(6) Remove the cover from the Silver Stat and
adjust the tapped -resistor R-1461 until the meter
M-1461 indicates approximately 120 volts. Final ad-
justment is made with the VOLT ADJ. RHEO control.
These adjustments are shown in Fig. 3-33.
(7) If switch S-1461 is in its MAN position, the
voltage is adjusted with the large control for rheostat
R-1466.
3-66
c. TRANSCEIVER ADJUSTMENTS FOR THE SR
SYSTEM.
(1) Connect the grid straps to the type 527 oscil-
lator tubes according to the frequency range of the
Antenna in use. If operation is desired in the blue
or highest frequency band, both grid straps must be
used. Connect one of these between the top grid
prongs, taking care not to damage the tubes in the
process. Connect the other grid strap between the
lower grid terminals. If operation is desired in the
ORIGINAL
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INSTALLATION AND NAVSHIPS 900,946 SECTION 3
INITIAL ADJUSTMENT
LOCAL
CONTROL
Figure 3-34. Transceiver, Operating Controls
ORIGINAL
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2 SECTION NAVSHIPS 900,946 INSTALLATION AND
0 Par. 17c(1) INITIAL ADJUSTMENT
yellow-green, or lower frequency band, place one
shorting strap across the lower grid terminals of the
tubes. Place corona balls on the two upper grid ter-
minals. When installing grid straps be sure that the
center lock screw is loose. Tighten the knurled nuts
at the grids first and then tighten the center screw.
(2) Check the duplexer length. When operating
on the blue band, adjust the duplexer length so that
the distance between the lower edge of the flange of
the upper U-shaped casting connecting the two du-
plexers and the center of the spark gap adjustment
knob is 97/8 inches. For the yellow-green band, the
distance should be approximately 115/8 inches. This
adjustment is available when the back cover of the
Transceiver is removed.
(3) Check the setting of the duplexer spark gaps.
They should be open between 1/32 and 1/16 of an
inch or roughly one turn of the adjustment knob.
These gaps may be observed through openings in the
duplexer when the Monitor Receiver is removed from
the Transceiver, or when it is slipped forward and the
right side shield of the Transceiver is removed.
(4) Place the CONTROL switch S-107 in its
LOCAL position. See Fig. 3-34.
(5) From the calibration chart on the front of
the oscillator door of the Transceiver, determine the
approximate setting of the controls A, B, and C. Place
these controls in their approximate positions. Control
A is the OSCILLATOR TUNING control, while B and
C are the 1st TUNING STUB and the 2nd TUNING
STUB controls, respectively. The proper setting of
these controls is critical for operation at maximum
efficiency. Final adjustment is made after other opera-
tions have been completed.
(6) Place the PULSE LENGTH switch S-158 on
the panel of the keyer compartment in its 20 micro-
second position. This switch is shown in Fig. 3-34.
(7) Place the EMERGENCY-MAIN POWER
switch S-101 in its ON position. After five seconds
the time delay relay in the Transceiver will operate
to permit d-c voltage to be applied to the plates of
the oscillator tubes.
(8) Set the filament voltage to 10 volts on the
FILAMENT VOLTAGE meter by adjustment of the
FILAMENT VOLTAGE control T-106. See Fig. 3-34
for the location of this control.
(9) Press the POWER ON button S-103. The
PLATE VOLTAGE meter should indicate 500 volts.
If it does not, adjust it to 500 volts with the RAISE
and LOWER switches. Then turn off the equipment
and adjust the cam controlling microswitch S-109 so
that this switch is open for all plate voltages below
500 volts. The cam is fastened by setscrews to the
shaft of the variable low:voltage transformer. The
location of this cam and those controlling micro-
switches S-110, S-111, and S-119 is shown in Fig. 3-35.
3-68
Figure 3-35. Limit Switch and Cam Assembly
in Transceiver
(10) Adjust the cam controlling microswitch
S-111 using the above procedure, so that this switch
is open for plate voltages above 700 volts.
(11) Connect an oscilloscope to the grid pulse
jack, J-106, on the Transceiver panel. Use the inter-
nal horizontal sweep frequency of the oscilloscope and
adjust it to approximately the repetition rate of the
transmitter which is 60 cps. Make final adjustments
of the oscilloscope repetition rate after the signal is
applied. Rotate the Antenna until it faces the Echo
Box Antenna.
(12) Raise the plate voltage by pushing the
RAISE switch 5-105 until the PLATE VOLTAGE
meter indicates 8 kv with the RADIATION switch
in its OFF position.
(13) Place the RADIATION switch ON momen-
tarily and observe the shape of the Keyer wave form
on the test oscilloscope. It should be as shown in
Figs. 3-36 and 3-37. The plate voltage should increase
to 11 kv when the RADIATION switch is operated.
SINE WAVE FROM TUNED CIRCUIT
SUPERIMPOSED ON RC DISCHARGE.
-4000
VOLTS
..-527 TUBES DRAW
PLATE CURRENT.
POINT WHERE
OSCILLATIONS BEGIN.
RESULTANT WAVEFORM
l(SHOULD BE SEEN IN SCOPE)
CONDENSER DISCHARGE OF LC NETWORKS
THRU TERMINATING RESISTORS.
PULSE
GUT-OFF GRID BIAS.
Figure 3-36. Keyer Pulse Waveform Development
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND
INITIAL ADJUSTMENT
NAVSHIPS 900,946
SECTION 3
Figure A
Good 20 Microsecond Grid Pulse Shape
Figure B
Figure C
Good 4 Microsecond Grid Pulse Shape Good 1 Microsecond Grid Pulse Shape
Figures A, B and C illustrate proper shapes of grid pulse patterns; the first hump is sufficiently high to insure a steep rise
at the point of oscillation, thus keeping the time of plate current flow just before oscillation to a minimum. The hump itself is
well below the level at which it would cause the tube to draw plate current.
Figure D
Poor 20 Microsecond Grid Pulse Shape
Figure E
Figure F
Poor 4 Microsecond Grid Pulse Shape Poor 1 Microsecond Grid Pulse Shape
Figures D, E and F illustrate grid pulse shapes in which the hump is too high and is causing plate current to flow at the top.
If the hump were to go still higher, it would rise above the level at which the tube oscillates resulting in "multiple pulsing" and
erratic patterns on both the grid pulse viewing scope and the indicator scopes.
Figure G
Poor 20 Microsecond Grid Pulse Shape
Figure H
Figure I
Poor 4 MIcrosecond Grid Pulse Shape Poor 1 Microsecond Grid Pulse Shape
Figures G, H and I illustrate grid pulse shapes in which the hump is too low, causing the rise at the firing level to be too
flat, thus resulting in plate current flow for some time before oscillation begins.
Figure 3-37. Keyer Pulse Waveforms
ORIGINAL
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2 SECTION
Par. 17c(14)
NAVSHIPS 900,946 INSTALLATION AND
INITIAL ADJUSTMENT
CAUTION
IF THE TUBES ARE ALLOWED TO RE-
MAIN OSCILLATING IN AN IMPROPER
OPERATING CONDITION FOR MORE
THAN A FEW SECONDS, PERMANENT
DAMAGE MAY BE DONE TO THEM.
(14) If the waveform is not correct, adjust the
20-R controls a step at a time and repeat (13) after
each adjustment. The 20-L control is a Vernier be-
tween steps on the 20-R control. If the overload relay
trips back the 20-R control off one step, find the cor-
rect operating point with the 20-L control. See Fig.
3-34 for the location of these controls. The result of
proper Keyer adjustments is an increase in the life
of the oscillator tubes and an increase in the overall
operating efficiency of the Transmitter. Ideal condi-
tions exist when the discharge period of the RC net-
work is equal to the natural period of the synchro-
nizing voltage as is shown in Fig. 3-36. The positive
peak of the resultant waveform should always be at
least 15% of the overall waveform amplitude, or ex-
cessive oscillator tube heating will occur Adjust the
R and L tap switches until the conditions shown in
Fig. 3-36 are satisfied. Distance D should never be
less than 15 per cent of the total waveform E. The
top portion of the waveform should be steep and
should not round off where oscillation begins. If R
is properly adjusted, it should be possible to vary the
L tap switch over three or four positions without
causing unstable operation. If the waveform seen
when operating on the 20 microsecond pulse has sev-
eral humps between a and b, it is not an indication
of an abnormal condition. These humps are caused
by the 60 cycle external synchronizing voltage used
only on the 20 microsecond position. It may be found
that changing the operating frequency of the Trans-
mitter from one portion of the band to another may
cause a change in the Keyer grid pulse waveform. For
this reason, a test oscilloscope should be used for
observing the grid pulse waveform whenever Trans-
mitter tuning or Keyer adjustments are made. Fig.
3-37 shows actual photographs of typical oscilloscope
patterns of the grid pulse waveforms.
(15) Place the Echo Box switch in its ON posi-
tion. Tune the Echo Box, using the G dial on the
Monitor Receiver panel, until a dip in the ECHO
BOX RESONANCE meter indication occurs. This
presumes that the Echo Box has been changed as de-
scribed in Navy Field Change No. 30. If the change
has not been made, tune the Echo Box to a peak in
the meter reading. Check the G dial (ECHO BOX
TUNE) reading against the calibration chart. The
frequency should be within the frequency range of
the Antenna plus or minus 3 megacycles of the center
of the band. If the deviation is too great, correct by
tuning the A dial. If it is necessary to retune the A
dial, repeat the check on the Keyer grid pulse shape
3-70
and of the plate and grid currents, as described previ-
ously. As a rule, tuning the A dial to higher numbers
lowers the frequency and vice versa. Adjust dial A
until the peak obtained is the largest that lies in the
frequency band of the Antenna.
(16)Adjust the 1st TUNING STUB (B) dial and
the ECHO BOX TUNE (G) dial alternately for maxi-
mum deflection on the ECHO BOX RESONANCE
meter. If the waveform changes during this adjust-
ment, readjust the L and R controls on the Keyer and
then continue the adjustment of die B and G dials.
(17) Repeat step (16) using the 2nd TUNING
STUB (C) dial and the G dial used in step (16).
(18) Repeat steps (16) and (17).
(19) Place the RADIATION switch in its OFF
position and place the PULSE LENGTH switch in its
4 position. Place the RADIATION switch in its
MOMENTARY position for a brief period of time
and observe the shape of the grid pulse. Compare its
shape with the ideal shapes shown in Figs. 3-36 and
3-37.
(20) Adjust the 4-R and 4-L controls shown in
Fig. 3-34 using the technique described in step (14).
Do not disturb the setting of any other controls during
this procedure.
(21) Repeat steps (19) and (20) using the 1-R
and 1-L controls and the 1 position of the PULSE
LENGTH switch. See Fig. 3-34. Check the wave-
forms against the 1-us waveforms in Fig. 3-37.
(22) Place the ON-OFF switch on the Monitor
Scope in its ON position. See Fig. 3-34.
(23) Adjust the V CENTER control (R-324) un-
til the sweep trace coincides with the etched line on
the face of the tube.
(24) Adjust the H CENTER control (R-322) un-
til the start of the sweep trace coincides with the 0
position etched on the face of the tube.
(25) Place the FOCUS control (R-331) in ap-
proximately the center of its range of rotation. For
the location of this control see Fig. 3-34.
(26) Adjust the FOCUS BALANCING control
(R-335) to obtain maximum definition and uniformity
of the sweep trace. This control is located on the
top rear center of the chassis, and is shown in Fig.
3-38. If necessary, re-adjust the FOCUS BALANCING
control after a video signal has been applied to the
Monitor Scope in subsequent procedures. After the
final re-adjustment, the FOCUS BALANCING control
should be in the proper operating position and should
require no further attention as the equipment is used.
Lock the control.
('27) Adjust the RANGE SELECTOR switch
S-301 to the 20 position. Adjust SWEEP LENGTH
control R-313 until end of sweep coincides with 4 on
the scale.
(28) Place the PULSE LENGTH switch in its
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND NAVSHIPS 900,946 SECTION 2
INITIAL ADJUSTMENT Par. 1708)4P
Figure 3-38. Monitor Scope, Focus Balancing Control
20 position and then place the RADIATION switch
in its ON position.
(29) Set the RF control on the Monitor Receiver
at 0, and set the IF GAIN control at 100. See Fig. 3-34.
(30) Adjust the RECEIVER TUNE (F) dial un-
til target echoes appear on the Monitor Scope. Reduce
the setting of the IF GAIN control through the re-
mainder of this procedure as necessary.
(31) Adjust the 2nd DUPLEXER (E) dial for
maximum echo amplitude and then adjust the 1st
DUPLEXER (D) dial for maximum echo amplitude.
(32) Adjust the RF control for maximum echo
amplitude.
(33) Adjust the knurled knobs that control the
spark gap spacing until the amplitude on the Monitor
Scope is maximum and the spark is clean and blue.
See Fig. 3-39. The outer conductors of the r-f lines
in the Transceiver are at ground potential and may be
handled with safety. DO NOT TOUCH ANYTHING
ELSE.
(34) Carefully trim the adjustment of the follow-
ing controls for maximum echo amplitude in the order
given:
2nd TUNING STUB (C)
RECEIVER TUNE (F)
2nd DUPLEXER (E)
1st DUPLEXER (D)
RF control
(35) Measure the frequency again with the Echo
Box. If it has shifted during the tuning procedure,
readjust the OSCILLATOR TUNING (A) dial and
repeat the tuning process. Continue these operations
until the frequency is correct at the end of the tuning
procedure.
(36) Make a final check to make certain that the
Transceiver operates properly on all three pulse
lengths. Turn the RADIATION SWITCH to its OFF
ORIGINAL
position while switching from one pulse length to
another. The voltages which may be expected on the
meters of the Transceiver during normal operation are
as follows:
PULSE LENGTH (Micro-
seconds)
20
4
1
PLATE VOLTS (kv.)
11
11
11
CATHODE CURRENT ( ma. )
35-55
30-40
15-25
GRID CURRENT (ma.)
10-13
6- 9
2- 4
Record the readings actually obtained.
d. SR-a TRANSCEIVER ADJUSTMENTS.
(1) Connect both grid straps for the blue an-
tenna. Use only the lower grid strap and the corona
balls for the yellow-green antenna. See step (1) of
Par. 17c.
0-138
CONDENSER
PLATE
0-136
ELECTRODE
Figure 3-39. Duplexer Spark Gap Adjustments.
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SECTION NAVSHIPS 900,946 INSTALLATION AND
Par. 170(2) INITIAL ADJUSTMENT
Figure 3-40. Time Delay Relay SR-a Modulator
(2) Check the duplexer length as directed in
step (2) of Par. 17c of this section.
(3) Check the duplexer spark gaps as directed in
step (3) of Par. 17c of this section.
(4) Place the CONTROL switch (S-107) in its
LOCAL position.
(5) Adjust the Transmitter A, B, and C controls
as described in step (5) of Par. 17c of this section.
(6) Remove the dust cover frolm time delay relay
K-2002 in the Modulator. See Fig. 3-40. When the
equipment is received, the metal clappers will have
supports to protect them during shipment. These
supports must be removed before the equipment can
be placed in operation. Check the sliding gear to see
that it is set on the 5-minute scale. If it is not, move
the sliding gear until the large gear is opposite the
5-minute index. Loosen the thumbnut on the discs
and rotate them until their index pins are opposite the
5-minute mark. Then tighten the thumbnut and
replace the dust cover.
(7) Place the EMERGENCY-MAIN POWER
switch S-101, in its ON position. After five seconds,
the time delay relay in the Transceiver will operate to
permit d-c voltage to be applied to the Modulator
permitting the Modulator time delay relay to start its
cycle. Five minutes must elapse before the POWER
ON switch can be operated.
(8) Set the filament voltage to 10 volts on the
FILAMENT VOLTAGE meter by adjustment of the
FILAMENT VOLTAGE control T-106.
(9) Press the POWER ON button S-103. After
five minutes the time delay relay in the Modulator
3-72
unit will close. This will be indicated at the Trans-
ceiver by the lighting of the PLATE VOLTS indicator.
(10) Place the RADIATION switch in the ON
position.
(11) Press the RAISE switch, holding it in until
the PLATE VOLTAGE METER indicates approxi-
mately 3.5 kv.
(12) Perform steps (13) to (36) inclusive of
Par. 17c of this section.
(13) Increase the plate voltage until the PLATE
VOLTAGE meter indicates 5 kv. If arcing occurs in
the oscillator compartment, retune to a different fre-
quency with dial A, and adjust the other controls for
optimum operation.
(14) Typical indications for? the Transceiver
meters in normal operation are as follows:
FILAMENT VOLTAGE 10 volts
PLATE VOLTAGE 5 kv.
PLATE CURRENT 20-30 ma.
GRID CURRENT 4- 8 ma.
Record the actual readings obtained.
(15) Adjust the repetition rate of the Modulator
to 120 cps. by means of the REPETITION RATE con-
trol (R-2001) located on the panel in the lower center
of the front of the unit. This control is shown in
Fig. 3-41. The rate should not be set higher than
120 cps. even though slightly better definition may be
obtained, because the faster repetition rate will tend
to overload the high voltage rectifier in the Trans-
ceiver. Connect the 60-cps line voltage across one
set of the plates of an oscilloscope and connect the
Figure 3-41. Modulator, Front View
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND NAVSHIPS 900,946 SECTION 2
INITIAL ADJUSTMENT Par. 17c1(15)IJ
BAND PASS VIDEO GAIN
P.P.I. MARKERS DIMMER
ECHO BOX FINE INTENSITY
I.F. GAIN RANGE SELECTOR
MARKERS
INTENSITY
VERTICAL
CENTERING
HORIZONTAL
CENTRING
FOCUS
ON OFF
POWER
CHALLENGE
RADIATION
RAISE MARKERS
OFF-ON SWITCH
CENTER EXPAND
FOCUS
RANGE
SWITCH
PLATE
VOLTAGE
LOWER
Figure 3-42. Operating Controls on Indicator Console
output between test jack J-2004 and ground to the
other set of plates. Adjust the repetition rate control,
R-2001 until a two-lobed Lissajous figure is visible on
the screen of the test oscilloscope. The repetition rate
will then be twice the line frequency, or 120 cycles ?
the line frequency variation. Another check on the
repetition frequency is to observe targets on the Moni-
tor Scope. The targets jitter at all repetition fre-
quencies except 120 cps.
ORIGINAL
SWEEP
LENGTH
RANGE STEP
HAND SLEW
ROTATION
SLEWING MOTOR
e. THE ANTENNA POSITIONING SYSTEM AD-
JUSTMENTS.
(1) Remove the disconnect plug P4301 in the
Pedestal base. Then remove the plug from the rear
end of the drive motor and insert the handcrank,
making certain that the tongue on the crankshaft
engages the groove in the motor shaft.
(2) Loosen the captive fillister head screws in the
edge of the synchro inspection door shown in Fig. 3-43.
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
3 SECTION
SYNCHROT1E INSPECTION
DOOR FRAME
ANTENNA
ANCHOR PAD
5781
HANDCRANK
NAVSHIPS 900,946
INSTALLATION AND
INITIAL ADJUSTMENT
OIL FILLER
PLUG
OIL LEVEL PLUG
OIL DRAIN PLUG
32466 BRUSH COVER
STOWING LOCK
TERMINAL
PANEL
3-74
Figure 3-43. Antenna Pedestal, Showing Synchro Inspection Door
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND
INITIAL ADJUSTMENT
NAVSHIPS 900,946
#F7."Ti
Figure 3-44. Rotation Control Unit, Front Panel
Pull the door away from the housing until all screws
are clear and lower the door on its hinges.
(3) Rotate the Antenna with the hand crank
until the Antenna is facing directly forward and en-
gage the stowing lock. This lock is shown in Fig. 3-43.
(4) Place the SYNCHRO SYSTEM switch S-1105
on the Rotation Control Unit in its A.C. position.
See Fig. 3-44.
ORIGINAL
SECTION
Par. 17e(2)
(5) Disconnect leads 60, 61, and 62 from the
terminal block E-1302 shown in Fig. 3-25 and located
on the panel shown in Fig. 3-43.
(6) Tie the disconnected 61 lead to terminal 155.
(7) Connect one lead of an a-c voltmeter to ter-
minal 154 and connect the other lead of the voltmeter
to the disconnected 60 lead. The voltmeter should be
operated on the 250 volt range.
(8) Loosen the three screws which hold the
synchro clamp ring in place.
(9) Place the ON-OFF switch on the panel of
the Rotation Control Unit in its ON position. See
Fig. 3-44.
(10) Carefully rotate the stator of the synchro
until a minimum reading is obtained on the voltmeter.
(11) Remove the voltmeter, and remove lead 61
from terminal 155.
(12) Connect one lead from a voltmeter to the
disconnected 60 lead.
(13) Connect the other voltmeter lead to the
disconnected 62 lead. This voltmeter should be capable
of indicating 0.1 volt. It should have a maximum
range of approximately 50 volts, and should be oper-
ated on that range for initial indications.
(14) Obtain a zero indication on the meter by
adjusting the position of the stator of the synchro.
Use the high meter scales for the initial indication, and
as a zero indication is approached, switch to the 0.1
scale. If a zero indication is not possible, approach
it as nearly as possible. Clamp the stator of the synchro
in the zero voltage position. Be certain that the zero
indication does not change as the clamp is tightened.
(15) Place the ON-OFF switch in its OFF posi-
tion and replace leads 60, 61, and 62 on their terminal
strip. The 36 speed synchro is now in its electrical
zero position.
(16) Disconnect leads 57, 58, and 59 from their
terminal strip E-1305 adjacent to the 1 speed synchro.
Tie the disconnected 58 lead to terminal 152.
(17) Connect one lead of an a-c voltmeter to
terminal 59 and the other lead to terminal 151. This
meter should have a range of from 0-250 volts.
(18) Loosen the clamp ring of the one-speed
synchro unit as in the case of the 36 speed unit.
(19) Place the ON-OFF SWITCH on the Rota-
tion Control Unit in its ON position and rotate the
stator until minimum voltage is indicated on the
meter.
(20) Turn off the power, disconnect the volt-
meter, and remove lead 58 from terminal 152.
(21) Connect one lead from a voltmeter to the
disconnected 59 lead, and connect the other voltmeter
lead to the disconnected 57 lead. This 'should be the
same as was used in aligning the 36 speed unit.
(22) Obtain a zero indication on the meter and
clamp the stator of the synchro as was done in aligning
the 36 speed unit.
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SECTION NAVSHIPS 900,946 INSTALLATION AND
Par. 17e(23) INITIAL ADJUSTMENT
.?
/
? i'
Figure 3-45. Mounting of Synchros in Bearing indicator
(23) Clamp the stator of the synchro in the zero
voltage position. Be certain that the voltage does not
change as the clamp is tightened.
(24) Remove power from the unit and replace
leads 57, 58, and 59 on their terminal strip.
(25) Replace the cover for the synchro access
door in the Pedestal. Do not release the stowing lock.
(26) Apply power to the system by placing the
power switch of the Rotation Control Unit in its ON
position.
(27) Loosen the mounting screws holding each
unit to the frame of the bearing indicator, as shown
in Fig. 3-45.
(28) Rotate the stator of each unit until the zero
position of the dial of the unit coincides with the
index on the frame of the Bearing Indicator. Clamp
the stators in this position.
(29) Release the stowing lock in the Antenna
Pedestal and replace the disconnect plug in the Pedes-
tal base.
(30) Place the SYNCHRO AMPLIFIER POWER
switch on the terminal box of the Synchro Unit of the
Synchro Amplifier in its ON position. As soon as the
tubes of the Electronic Unit heat, the Synchro Ampli-
fier will synchronize itself with the compass heading.
If instead it settles at a point 180 degrees off, the
trouble will be found in the reversal of connections in
the ship's wiring and not in the unit itself, as the units
are tested and operated under standard conditions at
the time of Navy inspection at the factory. Once the
Synchro Amplifier has been put into satisfactory opera-
tion its performance will be automatic. No attention
during operation will be required. No adjustment
3-76
should be necessary at the time of installation. The
electrical zero for the synchro units of the Synchro
Amplifier and for the commutator transmitter brushes
has been set at the factory, after which the gear train.
was pinned so as to maintain the relative position
between the 1-speed and the 36-speed control trans-
formers and commutator brushes. If the alignment is
found to be in error as evidenced by an error in the
indication of the true bearing dial of the Bearing
Indicator as compared with the known bearing of
the ship, adjust the unit as described in Section 7 of
this instruction book.
NOTE
STEPS (31) TO (40) APPLY ONLY TO
UNMODIFIED SR ANTENNA SYSTEMS.
IF THE SYSTEM HAS BEEN MODIFIED,
PROCEED WITH STEP (41).
(31) Place the ROTATION SWITCH S-804 on
the panel of the Bearing Indicator in its NORMAL
position. This switch is shown in Fig. 3-42.
(32) Place the SLEWING MOTOR switch S-801
in its OFF position. This switch is located on the
panel of the Bearing Indicator and is shown in Fig.
3-42.
(33) Loosen the panel screws on the Servo Am-
plifier shown in Fig. 3-44, and pull the chassis for-
ward until it locks. Turn the interlock bars so that
the interlock switches are closed.
(34) Place the ON-OFF switch of the Rotation
Control Unit in its ON position.
(35) Turn the INPUT GAIN control R-113
counter-clockwise. This control is shown in Fig. 3-46.
If the Antenna hunts, connect an a-c voltmeter with a
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND
INITIAL ADJUSTMENT
NAVSHIPS 900,946
TP-1107 TP-1106
TP-103
ANTI-HUNT
eammil
'. g1n.
S ?
D
I
11)
F.;?:
101,--r47-:,
).10-6.i'.5.:
i
ut5.u.u.
*tam
I i
? .. _ .e)
.__
,;/ .
,,?
III
BALANCE
TP- 1102
TP-I101
INPUT GAIN
Figure 3-46. Internal Controls of Servo Amplifier
50-volt range to terminals 63 and 64 on terminal
board. Then adjust the BALANCE control (R-1112)
until the system ceases to hunt and the voltage reading
is steady. This control is shown in Fig. 3-46.
(36) Place the SLEWING MOTOR switch in
one of its 11/4 positions.
(37) Advance the setting of the INPUT GAIN
control until the Antenna follows smoothly in both
CW and CCW rotation. This can be observed by
watching the Bearing Indicator dials.
(38) If the voltage indicated on the meter is
fluctuating at 42 cps, adjust the ANTI-HUNT control
R-1118 until the rotation is even and smooth and the
voltage fluctuation disappears. This control is shown
in Fig. 3-46. Again advance the INPUT GAIN con-
trol until hunting starts and re-adjust the ANTI-
HUNT control as before to stop the hunting. Con-
tinue these two adjustments alternately until the opti-
mum point is reached where any further advance of
the INPUT GAIN control cannot be compensated by
adjusting the ANTI-HUNT control. Disconnect the
voltmeter and connect it with a 0.5 mf capacitor in
series with one of its leads to terminals 68 and 69 on
terminal board E-1101. Adjust the ANTI-HUNT
control for minimum voltage.
(39) Reverse the direction of rotation several
times in rapid succession. The Antenna should come
to a full stop without hunting. With the SLEWING
MOTOR switch in its OFF position, the Antenna
should follow the HAND SLEW control smoothly and
ORIGINAL
SECTIC,0
Par. 1'
instantaneously. If it does not, repeat all of th We'
adjustments.
(40) Place the ROTATION switch in
or EMERGENCY position. The Antenna shot
tate smoothly at approximately 7 rpm.
NOTE
THE FOLLOWING STEPS APPLY ONLY
TO MODIFIED SYSTEMS.
(41) Place the ROTATION switch S-804 on the
panel of the Bearing Indicator in its NORMAL posi-
tion. This switch is shown in Fig. 3-42.
(42) With all switches in their OFF position,
proceed in adjusting the modified system in the same
way as was described for -adjusting the unmodified
system, in steps (32) through (39) inclusive.
(43) Place the SLEWING MOTOR switch in
one of its four rotational positions, and count the revo-
lutions per minute of the Bearing Indicator dials. If
the speed is too low, which sometimes occurs as a
result of aging of the rectifier units, move the taps on
transformer T-1104. The lead normally on tap 4
should be moved to tap 5, and the lead normally on
tap 7 should be moved to tap 8.
f. INDICATOR CONSOLE ADJUSTMENTS.
(1) Place the INDICATOR CONSOLE switch
S-405 on the panel of the General Control Unit in its
ON position. This switch is shown in Fig. 3-42.
(2) Place the ON-OFF switch S-501 on the PPI
Indicator in its ON position, and the CENTER EX-
PAND switch S-502 in its OFF position. See Fig. 3-42.
(3) Turn the RANGE SELECTOR switch S-500
on the PPI Indicator to the point where 200 appears
in the window above the switch.
(4) Adjust the FINE INTENSITY R-554 control
on the PPI Indicator until the PPI trace is barely
visible. Then adjust the FOCUS control R-576 and
FINE INTENSITY control until the line is sharp and
barely visible.
(5) Turn the VIDEO GAIN control R-559 on
the PPI Indicator until echoes appear on the PPI trace.
It may be necessary to rotate the Antenna to locate a
target.
(6) Rotate the HAND SLEW wheel on the Bear-
ing Indicator and note whether the trace is starting
from the center of the face of the PPI tube.
NOTE
AN OSCILLOSCOPE TS-34/AP (SERIES)
OR EQUIVALENT, A NAVY MODEL OBQ
(SERIES) VACUUM TUBE VOLT-OHM
MILLIAMMETER OR EQUIVALENT, AND
A RANGE CALIBRATOR TS-358/UP
(SERIES) OR EQUIVALENT, ARE RE-
QUIRED FOR ADJUSTMENT OF THE PPI
INDICATOR. THE SOURCE OF MARKER
VOLTAGE MUST SUPPLY FOUR MARKER
PIPS EACH FOR THE 4-, 20-, 80-, AND 200
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NAVSHIPS 900,946 INSTALLATION AND
4 INITIAL ADJUSTMENT
, 17f(7)
e 4 MILE 20 MILE 80 MILE 200 MILE
GATE GATE
0 ?
R507 R508 R509
GATE GATE
R5I0
4 MILE 20 MILE 80 MILE 200 MILE COARSE
SWEEP SWEEP INTENSITY
SWEEP SWEEP
R52I
R520 R5I9
R5I8
0
BIAS
R553 R564
Figure 3-47. FPI Alignment Controls
MILE RANGES. AN ALIGNMENT TOOL,
ADJUSTABLE WRENCH AND GLYPTOL
ARE ALSO REQUIRED.
(7) Connect a d-c vacuum tube voltmeter be-
tween terminal 1 of L-513 and ground. See Fig. 7-151.
Adjust potentiometer R-564 until the meter reads ?65
volts. This control is shown in Fig. 3-47.
(8) Set the RANGE SELECTOR switch on the
4-mile range, the CENTER EXPAND switch to OFF
and the MARKERS control completely off. Turn the
FINE INTENSITY control all the way on, and then
gradually raise or lower the COARSE INTENSITY
control, R-553, on the right side of the chassis, as
shown in Fig. 3-47 until a light clean line appears on
the scope face. Lock the COARSE INTENSITY con-
trol R-553 in this position. Switch the RANGE
SELECTOR knob to the other 3 positions successively,
lowering the FINE INTENSITY control each time
until approximately the same line intensity appears on
the scope face. There should be adequate range on
the FINE INTENSITY control to accomplish this test
and blank the PH tube on the 200-mile range. If this
condition is not obtainable, circuit-check the unit for
trouble as directed in Section 7.
(9) Loosen the clamp locks and clamps on the
focus coil, L-514, and grasp the handle. The clamp
and focus coil adjustment are shown in Fig. 3-48. Ro-
tate the coil until the start of the sweep line is in the
center of the tube. The center is located at the end
of the etched bearing line over the face of the tube.
Re-tighten clamps and locks. It may be necessary to
readjust the focus coil after all the other tests have
been made.
(10) Apply a 120-200 cps trigger to the equip-.
ment and observe the unblanking pulse on the plate
of V-501 on an oscilloscope such as the Oscilloscope
TS-34/AP (Series) or equivalent. With the Range
Selector Switch of the PPI on the. 80-mile range, ob-
serve how many scale divisions, on the scale over the
face of the oscillograph tube, are occupied by a com-
plete repetition cycle, and adjust R-509, Fig. 3-47, until
the position pulse occupies one-fifth of the entire repe-
tition cycle.
(11) With the same trigger applied to the equip-
ment, turn the Range Selector to the 200 mile range.
Adjust potentiometer R-510 until the positive pulse
occupies approximately one-half of the entire repeti-
3-78
tion cycle (actually 12/25 of it). See Fig. 3-47. Ten-
tatively lock potentiometers R-507, R-508, R-509, and
R-510. They will receive final adjustment later.
(12) Adjust potentiometers R-521, R-520, R-519
and R-518 on range positions 4, 20, 80 and 200 miles,
respectively, until the sweep length runs out to ap-
proximately one-half inch from the edge of the cath-
ode ray PPI tube. Tentatively lock all four controls.
These controls are shown in Fig. 3-47.
NOTE
THE ADJUSTMENT DESCRIBED IN
STEPS ( 13 ) AND ( 14 ) IS SEALED AT
THE FACTORY. IT SHOULD NOT HAVE
TO BE MADE EXCEPT UNDER MOST
UNUSUAL CIRCUMSTANCES.
(13) Using the range calibrator, feed its 1-mile
output into video terminals 180A and 01. The I.F.
Gain control on the panel of the Console Receiver
Figure 3-48. PPI Focus Coil Adjustment
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
INSTALLATION AND NAVSHIPS
INITIAL _ADJUSTMENT
?
1,711... Y ..,,?
\
C c
1
/
C
,
C
1
,
Figure 3-49. PPI Drive Motor
must be set to zero in this case. The MARKERS con-
trol on the PPI Scope should be turned off. With the
RANGE SELECTOR switch in the 4-mile position,
adjust the VIDEO GAIN and INTENSITY controls
so that four small dots appear on the face of the scope.
Turn the phase shift knob on the calibrator until one
dot coincides as closely as possible with the start of
the sweep circuit. Now slowly increase the marker
output on the PPI scope until 4 more dots appear.
These dots should be very close to the original set
of dots. If they are not, adjust the screw on inductor
L-502 until the two sets of marks coincide as closely
as possible. Then, holding the screw at this position,
tighten the lock nut and seal the adjustment with
glyptol. Check to make sure that the adjustment has
not been changed during tightening.
(14) In a similar manner, using appropriate
marks from the calibrator, align the 20, 80, and 200
mile ranges by adjusting L-503, L-504 and L-505
respectively.
(15) With a trigger applied, the RANGE SE-
LECTOR switch at 80 miles, the MARKERS control
and INTENSITY CONTROL adjusted so that dots
appear, adjust potentiometer R-509, shown in Fig.
3-48, so that exactly 4 dots (not counting the center)
appear on the face of the tube. Next, adjust potenti-
ometer R-519 so that the fourth dot is about one-half
inch from the usable edge of the tube.
(16) Switch the RANGE SELECTOR to 200
miles and adjust potentiometer R-510 so that the
fourth dot is at the end of the sweep. Now adjust
potentiometer R-518 so that the fourth dot on both
ranges coincide when the RANGE SELECTOR is
rapidly shifted from 200 to 80. The other dots should
also coincide very closely. Repeat this adjustment on
the 20-mile range using potentiometers R-508 and
R-520, and on the 4-mile range using potentiometers
ORIGINAL
900,946 SECTION
Par. 17f(13)
R-507 and R-521. When these adjustments have been
made, all of the screwdriver controls on the right side
bracket of the scope should be firmly locked. The
adjustments just described are shown in Fig. 3-47.
(17) Connect a test oscilloscope between plate
2 of V-514A and ground.
(18) Remove fuse F-501A from its holder. This
fuse is the second 3 amp fuse from the left on the
front panel. Removing this fuse breaks the O.S.C.
circuit to the PPI drive motor.
(19) Place the ON-OFF switch on the PPI Indi-
cator in its ON position.
(20) Rotate the shaft of the PPI drive motor
manually approximately 45 degrees from the zero out-
put position as shown on the scope. The drive motor
is shown in Fig. 3-49.
(21) Adjust the anti-hunt potentiometer, R-590,
for minimum amplitude on the oscilloscope. Lock the
control. This control is shown in Fig. 3-50.
(22) Connect the test oscilloscope between test
point J-528 and ground.
(23) Rotate the shaft of the drive motor until
the amplitude of the 60-cycle pattern on the test oscil-
loscope is zero. ? Note the position of the trace on the
PPI scope with respect to the azimuth scale.
(24) Rotate the drivemotor shaft until the trace
has moved exactly one degree on the azimuth scale.
(25) Adjust the vertical amplifier on the test
oscilloscope until the amplitude of the 60-cycle pattern
is exactly two inches.
(26) Replace fuse F-.501A and rotate the Antenna.
The height of ' the test pattern should never be less
than one inch, or one large square, during the rota-
tion of the Antenna. This indicates that the bearing
error at the Indicator does not exceed one-half of one
degree.
(27) Watch the PPI sweep while the Antenna is
rotating. Reverse the direction of the Antenna several
times. The PPI trace should follow the
Antenna
Figure 3-50. Anti-Hunt Control on PPI Indicator
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2 SECTION
?'y Par. 17f(27)
NAVSHIPS 900,946 INSTALLATION AND
INITIAL ADJUSTMENT
Figure 3-51. Adjustment of Synchro Control
Transformer
smoothly with very little jumpiness. If jumpiness is
observed, readjust the anti-hunt control, R-590, until
the jumpiness disappears.
(28) Stop the Antenna on zero degrees azimuth
as indicated by the ship's head marker. Loosen the
clamps on the synchro-control transformer B-502 and
rotate it until the PPI trace also indicates zero degrees
of azimuth. See Fig. 3-51. Tighten the clamps. The
indicator will now indicate the position of the An-
tenna in azimuth.
(29) Adjust the INTENSITY control R-658 until
the sweep appears. Then adjust the FOCUS control
(R-655) until the line becomes sharp and clean. If
there is a vertical step in the sweep line, push the
RANGE STEP control in until the switch snaps and
the step disappears. The operating controls are shown
in Fig. 3-42.
(30) If the sweep line is not three-eighths of an
inch above the numbers, adjust the VERTICAL CEN-
TERING control, R-642, until the correct spacing is
obtained.
(31) Adjust the HORIZONTAL CENTERING
control (R-695) until the line starts directly over the
zero on the left side of the screen.
(32) Turn the RANGE switch S-600 until the
number 20 appears in the MILES window, and turn
the MARKERS switch S-602 to the ON position. These
controls are shown in Fig. 3-42. Four markers should
appear as vertical pips below the sweep line. Each
of these markers should fall directly behind the num-
bers on the range scale on the face of the tube.
3-80
(33) If the markers do not fall in the right place,
adjust the SWEEP LENGTH control, R-671, until the
markers line up with the numbers.
(34) Turn the RANGE SWITCH to each of the
other ranges and note whether markers appear. They
will not necessarily fall behind the numbers since the
SWEEP LENGTH control must be adjusted each time
the range is changed. Set the RANGE switch to the
4-mile range and adjust the length of the sweep..
(35) Pull out the RANGE STEP control. A
vertical step or break should appear in the sweep line.
Turn the RANGE STEP control until the step just
touches the left of the 1-mile marker and note the
reading on the RANGE YARDS counters. It should
be 2,000 yards. Repeat this test for each of the other
markers. The markers on the 20 mile range should
each be 10,000 yards apart with an allowable error
of plus or minus 100 yds. The markers are 20 miles
apart on the 80 mile range. Return the RANGE STEP
control to its former position.
(36) Advance the I.F. GAIN control on the panel
of the Console Receiver until grass, which represents
noise, appears on the sweep line of the Range Scope.
This control is shown in Fig. 3-42. Adjust the control
until the grass is one-quarter of an inch high.
(37) Rotate the HAND SLEW wheel on the
Bearing Indicator until a target appears. The target
will be a vertical pip above the sweep line.
(38) Adjust the R.F. control on the panel of the
Monitor Receiver for maximum target amplitude, with
the TIME CONSTANT control S-702 of the Console
Receiver in its No. 1 position, and all other controls
inside the door on the Console Receiver turned all the
way counterclockwise.
(39) Place the CHALLENGE switch (S-901) on
the IFF Coordinator (See Fig. 3-42) in its MOMEN-
TARY position. A second line should appear three-
eighths of an inch below the numbers.
.NOTE
THE FOREGOING STEPS INDICATE THE
CORRECT OPERATION OF THE CON-
SOLE RECEIVER AND THE RANGE
SCOPE. IF THE ADJUSTMENTS JUST
DESCRIBED CANNOT BE MADE TO PRO-
DUCE THE CORRECT RESULTS IT MAY
BE THAT SOME OF THE CIRCUITS RE-
QUIRE ALIGNMENT. IT SHOULD SEL-
DOM BE NECESSARY TO COMPLETELY
ALIGN THE RANGE SCOPE. IT IS REC-
OMMENDED THAT INSTALLATION
PERSONNEL REFER TO THE STEPS AP-
PLICABLE TO THE DIFFICULTY THAT
IS EXPERIENCED, AND NOT ATTEMPT
TO COMPLETELY ALIGN THE RANGE
SCOPE EXCEPT WHERE THE PERFORM-
ANCE INDICATES THAT IT IS NECES-
SARY. THE RANGE MARKER COILS ARE
ORIGINAL
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INSTALLATION AND
INITIAL ADJUSTMENT
NAVSHIPS 900,946
I.F. F. LINE ADJUST
Figure 3-52. IFF Line Adjustment Control
in Range Scope
CORRECTLY ADJUSTED AND SEALED
AT THE FACTORY AND THEY SHOULD
ONLY BE READJUSTED IF NECESSARY
IN A MANNER SIMILAR TO THAT DE-
SCRIBED FOR CALIBRATING THE
MARKERS IN THE PPI.
(40) If the radar and IFF sweep lines are not
sufficiently separated or if the IFF sweep is above
the radar sweep, place the CHALLENGE switch shown
in Fig. 3-42 in its ON position. The Range Scope
chassis must be pulled two-thirds of the way out of the
chassis for the remainder of the alignment. Adjust
the screwdriver operated IFF LINE ADJUST control
R-6026 until the IFF sweep is properly located. This
control is on the rear of the righthand deck and is
shown in Fig. 3-52.
(41) If the sweep cannot be properly focused,
turn the I.F. GAIN control on the panel of the Con-
sole Receiver to zero and turn the MARKERS switch
S-602 on the panel of the RANGE SCOPE to ON.
Adjust the FOCUS BAL. control, R-645, and the
FOCUS Control, R-655, alternately to obtain the best
definition of the sweep. The FOCUS BAL. control
is shown in Fig. 3-53 and the FOCUS control is shown
in Fig. 3-42. The ideal adjustment is reached when
both the sweep and marker pips are as thin and sharp
as possible.
(42) If the RANGE YARD readings do not fall
within the tolerance given, the range step must be
adjusted. Turn the MARKERS switch ON, and set
the RANGE switch to the 4-mile range. Pull out
the RANGE STEP control and rotate it until the step
ORIGINAL
SECTION
Par. 17f(40) ?P
R645
FOCUS BAL
R628
20 MI. SLOPE
R627
4 MI. SLOPE
R 635A
R 6358
20 MI. ZERO SET dit
R 634A
R 634B
4 MI. ZERO SET
R 6037
80 MI, SLOPE
Figure 3-53. Controls on Left Hand Side of
Range Scope Chassis
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3 SECTION NAVSHIPS 900,946 INSTALLATION AND
INITIAL ADJUSTMENT
COUNTER
READING
YARDS
0
COUNTER
READING
YARDS
CHANGING R627 OR R628
CHANGES THE SLOPES
AS SHOWN BELOW
CORRECT
45? SLOPE
ACTUAL STEP WIDTH IN YARDS
CHANGING R634 OR R635
CHANGES THE ZERO-SET
AS SHOWN BELOW
CORRECT ZERO-SET LINE
I I I I tI I I I II t I I 1'111,1
ACTUAL STEP WIDTH IN YARDS
3-82
Figure 3-54. Plot of Range vs. Counter Readings
ORIGINAL
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INSTALLATION AND
INITIAL ADJUSTMENT
NAVSHIPS 900,946
lines up with the left-hand range marker. Record the
reading in the RANGE YARDS window. Repeat this
operation for each marker. Plot the results graphically
as shown in Fig. 3-54. A line drawn through the
points on the graph should be straight and should
bisect the 90-degree angle formed by the two coordi-
nates of the graph. If it does not, adjust the 4-MILE
SLOPE control (R-627) shown in Fig. 3-53 and repeat
the test. Continue this procedure until the readings
do not vary over plus or minus 100 yards. Repeat
this procedure for the 20-mile and 80-mile ranges if
necessary, using the 20-MILE and 80-MILE SLOPE
controls, R-628 and R-6037, shown in Fig. 3-53. Ex-
tend the line on the final graphs to see whether they
pass through zero on the graph. See Fig. 3-54. If
they do not, either of two methods may be used to
make the necessary adjustment. One method is to
make a slight adjustment of the 4-MILE ZERO SET
control, R-634, for the 4-mile range and the 20-MILE
ZERO SET control, R-635, for the 20-mile and 80-mile
ranges and replot the graphs, continuing this pro-
cedure until the line passes through the zero point on
the graph. This is the most accurate method. If it
is impossible to obtain a straight line in the graphs, it
will be necessary for maintenance personnel to adjust
the linearity of potentiometer R-632 or replace it. It
is not practical for installation personnel to make this
adjustment since special equipment and skill are
required.
(43) Another calibration method is to rotate the
RANGE STEP control until 10,000 appears on the
lower counter. Then adjust the 20-MILE ZERO SET
control R-635 shown in Fig. 3-53 until the first marker
coincides with the vertical portion of the range step.
Now rotate the RANGE STEP control until 30,000
appears in the lower window and adjust the 20 MI.
SLOPE control R-628 until the third marker and the
vertical portion of the range step coincide. Repeat
these two operations until the markers are aligned
with the counters. Check the markers at 20,000 and
40,000 yards. If they are in error over ?-100 yards
the helipot must be adjusted or changed. See Section
7. Place the RANGE SELECTOR switch in its 4-mile
position, and rotate the RANGE STEP control until
10,000 appears in the window. Then adjust the 4-MI.
ZERO SET control R-634 shown in Fig. 3-53 until the
first marker and range step coincide. Next, rotate the
RANGE STEP control until 30,000 appears in the
lower window and adjust the 4-MI. SLOPE control
R-627 until the third marker and the range step co-
incide. Place the RANGE SELECTOR switch in its
80-mile position and rotate the RANGE STEP control
until 40,000 appears in the lower window. Adjust the
80-MI. SLOPE control R-6037 until the fourth marker
coincides with the range step.
(44) If an SR-a radar system is being considered,
it may be necessary, in order to obtain satisfactory
operation of the Range Scope, to adjust the amplitude
ORIGINAL
SECTION
Par. 17f(42) lor
of the trigger supplied from the Transceiver. The
amplitude of this trigger is adjusted by means of
potentiometer R-116, located on the lower left-hand
side of the Transceiver. This potentiometer is visible
with the side shield of the Transceiver removed. In-
crease the trigger amplitude until the sweep on the
Range Scope becomes steady.
(45) Rotate the HAND SLEW wheel and note
the movement of the PPI trace. It should rotate in
synchronism with either the TRUE BEARING dial or
the RELATIVE BEARING dial, depending upon the
type of operation in use.
(46) Turn the SLEWING MOTOR switch,
shown in Fig. 3-42 to all of its different positions. In
relative bearing operation the PPI trace should revolve
at 11/4 and 5 rpm for the corresponding positions of
the dial.
(47) Adjust the ROTATION switch to the PPI-
OR-EMERGENCY position. The PPI trace and the
dials should rotate at approximately 7 rpm.
(48) If the speed of the slewing motor is fast
or slow, it may be adjusted by changing the taps on
transformer T-801. The wires connected to terminals
6 and 7 should be placed on smaller numbered ter-
minals in the same order to increase the speed. They
should be moved to higher numbers to decrease the
speed. If the Indicator Console has been in use at
some other 'installation and is being re-installed, this
adjustment should be checked because the speed de-
creases as the dry disc rectifiers in the Bearing Indi-
cator age.
(49) If the Range Scope does not show two sharp
well defined lines when the CHALLENGE switch is
operated, and the trouble cannot be corrected in the
Range Scope, connect a vacuum tube voltmeter to the
arm of the BIAS ADJUST Control R-944. The loca-
tion of this control is shown in Fig. 3-55.
Figure 3-55. Bias Voltage Control on
IFF Coordinator
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SECTION
"0 Par. 17f(50)
NAVSHIPS 900,946
TRIGGER DELAY
Figure 3-56. Trigger Delay Control on
IFF Coordinator
(50) Adjust the BIAS ADJUST control until the
meter reads ?85 volts.
(51) Train the Antenna on a friendly ship or
aircraft equipped with IFF equipment, and place the
CHALLENGE switch in its ON position. The IFF
response pip should appear directly below the radar
target pip. If it does not, adjust the IFF REC. GAIN
control, R-934, for an amplitude that is easily visible.
Then adjust the TRIGGER DELAY control, R-917,
until the IFF pip is directly under the radar pip. Lock
the control. This control is shown in Fig. 3-56.
(52) If a source of jamming signals is available,
pick up a CW or MCW jamming signal with a radar
target and with the BAND PASS control in its
BROAD position, adjust the controls RE J 1 and REJ
2 for a maximum reduction of the reading on the
JAMMING INDICATOR meter. These controls are
shown in Fig. 3-57. A large saturated signal should
appear on the Range Scope. Adjust the BAL video
control, shown in Fig. 3-57, until the amplitude of the
large signal is reduced to the base line and only the
radar video signal is left.
3-84
INSTALLATION AND
INITIAL ADJUSTMENT
Figure 3-57. Console Receiver Anti-Jam Controls
(53) Readjust the BAL VIDEO control until the
jamming block is again visible, with the TIME
CONSTANT control in position 1. Turn the control
to position 2. The blocking pulse should build up
quickly on the Range Scope screen and decay at a
slow rate. Turn the control to position 3. The block-
ing pulse should build up to full height almost instan-
taneously and then drop to about half of its initial
height and remain there for the duration of the pulse.
Return the TIME CONSTANT control to position 1.
(54) Turn the BANDPASS control from its
BROAD to its MEDIUM position and adjust the I.F.
TUNE control for maximum signal amplitude. Re-
peat this operation for the SHARP position. Unless
the jamming signal frequency is the same as the radar
transmitter frequency, these controls should greatly
reduce the effect of the jamming signal. These con-
trols are shown in Fig. 3-57.
(55) Completely recheck the operation of the
equipment. It should now be properly installed and
ready to turn over to operating personnel.
ORIGINAL
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OPERATION NAVSH IPS 900,946
SECTION 4
OPERATION
1. GENERAL.
a. The instructions in this section describe the use
of controls normally required to operate the equip-
ment. Two types of operation are described. Both
types are similar except that in LOCAL operation the
controls are all operated at each component. In RE-
MOTE operation, most of the functions are controlled
from the Indicator Console. The steps required to
operate the SR Equipment and the SR-a Equipment are
both given. The methods are identical except for the
steps involved in starting the Transceiver and Modu-
lator. Both methods assume that the Transceiver is
properly aligned and operating on the correct fre-
quency. However, since it is the duty of operating
personnel to keep the equipment tuned, the tuning
procedure is also given.
2. STARTING THE EQUIPMENT.
a. ENERGIZING POWER EQUIPMENT.
(1) Place the Controller Disconnect Line Switch
in its ON position. This makes the ship's d-c power
available to the motor starting circuits.
(2) Push the START switch on the Pushbutton
Station. This switch energizes the Magnetic Con-
troller and starts the motor on the Motor-Generator.
If the overload device trips it may be reset by pressing
the Reset button. See Fig. 4-1. In the later SR Equip-
ment resetting occurs automatically when the START
button is pressed.
(3) Place switch S-1461 shown in Fig. 4-2 in its
AUTO position and read the meter on the Voltage
Regulator. It should indicate 120 volts. If it does not,
SECTION A
Par. la
adjust the VOLT ADJ RHEO control R-1462 until it
does. See Fig. 4-2. If manual voltage regulation is
desired place switch S-1461 in its MAN position and
regulate the voltage with rheostat R-1466.
b. ENERGIZING THE SR RADAR SYSTEM.
(1) Place the EMERGENCY MAIN POWER
switch S-101 in its ON position. See Fig. 4-3. The
MAIN POWER ON and FILAMENT ON lamps
should glow. Five seconds must elapse before the
POWER ON switch is operated.
(2) Place the CONTROL switch S-107 in the
position desired. If the LOCAL position is used, the
rest of the Transceiver power circuits are energized at
the Transceiver and the steps in the remainder of this
paragraph are used. If REMOTE operation is used,
the rest of the Transceiver power circuits are energized
at the General Control Unit in the Indicator Console.
In this case use the POWER, PLATE VOLTAGE, and
RADIATION switches on the General Control Unit
instead of the ones on the Transceiver. When LOCAL
control operation is used, the LOCAL CONTROL
lamps on the Transceiver and the General Control unit
are illuminated.
(3) In the unmodified SR Equipments, place the
PULSE LENGTH switch S-158 on the Keyer Unit in
the desired position. See Fig. 4-4. The 20 position
is used on long range targets, the 4 position is used on
short range targets and the 1 position is used at ex-
tremely close ranges and when better definition is
desired where two or more targets are closely spaced.
(4) Adjust the FILAMENT VOLTAGE control
Figure 4-1. Magnetic Starters
ORIGINAL
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4-1
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A SECTION
Par. 2b(4)
NAVSHIPS 900,946 ?
OPERATION
17.1:TAppl
1111."4:.
l Pig pi,*
Hui'
Figure 4-2. Voltage Regulator, Operating Controls
T-106 until the FILAMENT VOLTAGE meter M-106
indicates 10 volts. These controls are shown in
Fig. 4-3.
(5) Press the POWER ON switch S-103. The
PLATE VOLTS lamp should glow.
(6) Press the RAISE switch S-105, holding it in
until the PLATE VOLTAGE meter M-103 indicates
five kilovolts. These controls are shown in Fig. 4-3.
(7) Place the ON-OFF switch on the Monitor
Scope in its ON position. This switch is shown in
Fig. 4-5.
4-2
(8) Place the INDICATOR CONSOLE switch in
its ON position. This control is shown in Fig. 4-6.
(9) Place the ON-OFF switch S-501, on the PPI
Indicator in its ON position. See Fig. 4-7.
(10) Place the RADIATION switch S-108 in its
ON position. The indication on the PLATE VOLT-
AGE meter M-103 should increase to 11 kilovolts and
the TRANSMITTER ON lamp 1-402 on the General
Control Unit should glow.
(11) Place the ON-OFF switch S-201 on the
Monitor Receiver in its ON position. See Fig. 4-10.
ORIGINAL
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OPERATION NAVSHIPS 900,946 SECTION 4
Figure 4-3. Transceiver, Operating Controls
ORIGINAL
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A SECTION
-I. Par. 2b(11)
NAVSHIPS 900,946 OPERATION
Figure 4-4. Keyer Unit, Operating Controls
If Echo Box is modified tune the ECHO BOX TUNE
control for a sharp dip on the Echo Box Meter. If it
is not modified tune for Maximum Meter deflection.
Determine transmitter frequency from calibration
chart for ECHO BOX TUNE Control. If the trans-
mitter is off, frequency tune it as directed in Par. 5 of
this section.
(12) Record all meter readings in the log. The
following meter readings are normal to a reasonably
close approximation.
PULSE
PLATE
CATHODE
GRID
LENGTH
VOLTS
CURRENT
CURRENT
20 us
11 kv.
35-55 ma.
10-13 ma.
4 us
11 kv.
30-40 ma.
6- 9 ma.
1 us
11 kv.
15-25 ma.
2- 4 ma.
(13) To stop operation, place all switches in their
OFF positions.
c. ENERGIZING THE SR-a RADAR SYSTEM.
(1) Energize the power equipment as directed in
Par. 2a of this section.
(2) Place the EMERGENCY MAIN POWER
switch S-101 in its ON position. This control is on the
Transceiver as shown in Fig. 4-3. The MAIN POWER
ON and FILAMENT ON lamps should glow.
(3) Place the CONTROL switch S-107 shown in
Fig. 4-3, in the position desired. See Par. 2b (2 ) of
this section.
(4) Adjust the FILAMENT VOLTAGE control
T-106 until the FILAMENT VOLTAGE meter indi-
cates 10 volts. These controls are shown in Fig. 4-3.
(5) Five minutes must elapse between the per-
formance of step (2) and the operation of the POWER
ON switch. After this time has elapsed, the time delay
relay in the Modulator closes its contacts and the
POWER ON switch S-103 may be pressed. The PLATE
VOLTS lamp 1-104 should glow. These controls are
shown in Fig. 4-3.
4-4
Figure 4-5. Monitor Scope, Operating Controls
ORIGINAL
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OPERATION NAVSHIPS 900,946 SECTION A
Par. 2c(6)-11.
LOCAL TRANSMITTER
CONTROL ON
RADIATION
iffire
MENTARY OFF ON
CAUTION
p TURN RADIATION OFF TO SHIFT PULSE),
. LENGTH. WAITS SECONDS AFTER SHIFT sl
DEFOE RADIATIDN IS TURNED ON. i
ON RAISE
POWER PLATE VOLTAGE
OFF LOWER
7.%
TYPE CUT-23AEW
GENERAL CONTROL PANEL
SE?IAL
NAVY DEPARTMENT - BUREAU OF SNIPS
??
onSIPPOROVAl IMICloNC ? mmAJOIGNAMCCO
r:r ? 3 e ? (ea
OFF ON
INDICATOR
CONSOLE
Figure 4-6. General Control Unit, Operating Controls
(6) Place the RADIATION switch S-108 in its
ON position. See Fig. 4-3. The TRANSMITTER ON
lamp on the General Control Unit should glow.
(7) Press the RAISE switch S-105, holding it in
until the PLATE VOLTS meter M-103 indicates five
kilovolts. .This indicates that 15 kilovolts is being
applied to the plates of the Transmitting oscillators.
Measure the frequency as described in Par. 5b of
this section. If the overload relay trips before the
plate voltage reaches five kv. retune the transmitter as
described in Par. 5 of this section.
(8) Read and record the meter readings. The
following meter readings are typical. If the meter
readings differ radically from those given or if the
transmitter does not oscillate see Par. 5 of this section.
ORIGINAL,
PLATE VOLTAGE PLATE CURRENT CATHODE CURRENT
5 kv. 20-30 ma. 4-8 ma.
(9) Place the ON-OFF switches on the Monitor
Scope and the PPI Indicator in their ON positions.
Then place the INDICATOR CONSOLE switch in its
ON position. See Par. 2b of this section.
d. ENERGIZING ANTENNA POSITIONING
SYSTEM.
(1) Place the SYNCHRO SYSTEM switch S-1105
on the Rotation Control Unit in its A.C. or O.S.C.
position, depending upon whether true or relative
bearing information is desired. This control is shown
in Fig. 4-8.
(2) Place the SERVO-GEN. MOTOR circuit
breaker K-1108, the ANT. TRAIN MOTOR circuit
breaker K-1107 and the REMOTE INDICATOR
switch S-1104 in their ON positions.
(3) Place the ON-OFF switch S-1101 in its ON
position. This control is shown in Fig. 4-8.
(4) Place the SYNCHRO AMPLIFIER POWER
switch on the Synchro Amplifier in its ON position.
The red POWER lamp on the Synchro Amplifier
should glow. These controls are shown in Fig. 4-9.
The antenna positioning system is now energized and
ready for operation.
FOCUS
?
VT
CENTER
EXPAND
glgin
?
MARKERS
FUSE
FUSE
ALARM =IP 00
3 AMP
6 6 ""141A'T'01"" e
0
Figure 4-7. PPI Indicator, Operating Controls
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4SECTION NAVSHIPS 900,946 OPERATION
Par. 3a(1)
Figure 4-8. Rotation Unit, Operating Controls
0-
Ci----
000MPA$S EXCITATION?
?SYNC/INC/AN:410ER POWERO
ON
0 POWER 0
9 -
9
0 e
Figure 4-9. Synchro Amplifier, Operating Controls
4-6
3. PRE-OPERATION CHECKS AND ADJUSTMENTS.
a. GENERAL.
(1) The procedure's in Par. 2 of this section apply
power to the entire SR and SR-a Equipments. When
they have been performed, the system is radiating and
requires only a pre-operation check before commencing
actual operation. The pre-operation checks consist of
checking the adjustments of all operating controls that,
once adjusted, normally require no further attention
during routine operation. The procedure for these
controls is given in the next paragraph.
b. ADJUSTMENT OF OPERATING CONTROLS.
(1) Adjust the FOCUS control R-331, and the
INTENSITY control R-328 alternately for best defini-
tion and clarity of the sweep. These controls are
shown in Fig. 4-5.
(2) Referring to Fig. 4-5, adjust the V CENTER
control, R-324, until the sweep on the Monitor Scope
coincides with the etched line.
(3) Adjust the H CENTER control R-322 until
the start of the sweep coincides with the zero etched
on the sereen. See Fig. 4-5 for the location of this
control.
(4) Adjust the SWEEP LENGTH control R-313
until the sweep length is equal to the length of thc
etched line.
(5) Place the RANGE SELECTOR switch S-301
in its 20 position.
(6) Adjust the RECEIVER TUNE CONTROL
(F) and the R.F. control on the Monitor Receiver for
best appearance of targets on the Monitor Scope. See
Fig. 4-10. Adjust the VIDEO GAIN control R-342 for
the desired amplitude on the Monitor Scope.
(7) Adjust the I.F. GAIN control on the Monitor
Receiver for approximately one-quarter to one-half
inch grass on the Range Scope in the Indicator Con-
sole. See Fig. 4-10.
(8) Turn the I.F. GAIN control on the Console
Receiver to the minimum, or zero position. See Fig.
4-11. Set the PPI MARKERS and ECHO BOX
switches on this same unit to OFF.
(9) Turn the VIDEO GAIN and MARKERS con-
trols on the PPI Scope to maximum counterclockwise
position. Also, place the CENTER EXPAND switch
in its left-hand position so that the trace on the tube
begins at the very center of the tube face. These con-
trols are shown in Fig. 4-7.
(10) The SLE WING MOTOR swiech on the
Bearing Indicator should be in the OFF position, and
the ROTATION switch in the NORMAL position.
See Fig. 4-12.
(11) Place the CHALLENGE switch in its OFF
position. See Fig. 4-13.
(12) A fine horizontal line should be observed
on the face of the range scope tube. This line runs
horizontally across tube and should appear just above
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
. OPERATION NAVSHIPS 900,946 SECTION 4
Figure 4-10. Monitor Receiver, Operating Controls
ORIGINAL
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4-7
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
4 SECTION NAVSHIPS 900,946 OPERATION
01?.1.01{41? 0,1Au OF S.,
.... ???
411111.5.11.1?1.",,,,,,66,0:11.91,?1(0
c ..... cc ?....tu4
4-8
Figure 4-11. Console Receiver, Operating Controls
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
OPERATION NAVSHIPS 900,946 SECTION 4
TYPE CAY-55.,FC
'HARING IHDiGATO
MEM
?,.
? '0 ,,,, 41C3,
z ? ;;,`::,`:`
11
? P.P.I.
OR NORMAL
EMERGENCY
FUSE
ALARM
?
Figure 4-12. Bearing Indicator, Operating Controls
ORIGINAL
?
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I SECTION
'T Par. 3b(12)
NAVSHIPS 900,946 OPERATION
MOMENTARY OFF ON
2 AMP
2 AMP
` 2 ,Arv
F
=1.1111
? Figure 4-13. IFF Coordinator, Operating Controls
the top set of figures engraved on the transparent win-
dow over the front of the range scope cathode ray tube.
See Fig. 4-14. If this line does not appear, the IN-
TENSITY control, shown in Fig. 4-14, must be ad-
justed until the line :appears with normal brilliance.
If the line is fuzzy, the FOCUS control should be regu-
lated until the line is 'sharp, and well defined. Some-
times it is necessary to operate the INTENSITY and
FOCUS controls together until a sharp, clean line is
present on the tube face. If there is a vertical step
on the sweep line, this indicates that the phantastron
is running. It should be turned off by pushing the
RANGE STEP switch in. See Fig. 4-14.
4-10
(13) The start of the sweep on the left-hand side
of the tube face should be centered directly over the
zero figure on the scale. If the line does not start
directly above the zero figure, it may be shifted later-
ally on the face of the tube with the HORIZONTAL
CENTERING control shown in Fig. 4-14. If the sweep
line is not three-eighths of an inch above the numbers,
it may be moved vertically with the VERTICAL CEN-
TERING control shown in Fig. 4-14. After adjusting
these two controls, the line should appear just above
the top row of numbers. The left-hand starting point
of the line should be directly above the center of the
zero figure.
(14) The sweep length should be checked next.
Set the RANGE SWITCH shown in Fig. 4-14, so that
the number 20 appears in the small window indicated
as MILES on the panel and is directly above the
RANGE switch. This places the Range Scope on the
20-mile?range. Turn the MARKERS switch on the
ON position. See Fig. 4-14. Four markers should
appear as vertical pips below the sweep line. Each of
these should fall behind one of the figures on the scale
over the face of the tube as shown in Fig. 4-15. If they
do not fall behind the figures, the SWEEP LENGTH
control shcwn in Fig. 4-14, should be turned until all
four markers line up. Turn the RANGE SWITCH to
the 4-mile, 80-mile and 200-mile ranges and make cer-
tain that the markers appear. They will not neces-
sarily fall behind the numbers on the other ranges.
This check is made to make certain that the markers
are present on all of the four ranges. It is necessary
to adjust the SWEEP LENGTH control each time the
range is changed during operation.
(15) With the MARKERS switch still in the ON
position and the equipment on the 20-mile range, pull
out the RANGE STEP control. This control is shown
in Fig. 4-14. A vertical break, or step, should appear
on the sweep line as shown in Fig. 4-16. Crank the
RANGE STEP handle until the break just touches the
left-hand side of the first, or 5-mile marker. This is
the marker just at the Figure / on the lower scale
which indicates 10,000 yards or five nautical miles.
Read the RANGE YARDS counters shown in Fig.
4-14; they should indicate 10,000 yards. Repeat this
operation with the other markers. ALL RANGE
COUNTERS should read correctly to within 100 yards
on all marker points. Turn the RANGE SWITCH to
the 4-mile and 80-mile ranges and repeat this check
of the RANGE STEP on these ranges. If the range
counters do not indicate to the required accuracy, the
phantastron circuit should be adjusted as described
in Section 3 or Section 7.
CAUTION
DO NOT ATTEMPT TO FORCE THE
RANGE STEP CONTROL BEYOND ITS
LIMITS. TURN CONTROL SLOWLY
WHEN NEARING THE END OF ITS
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
OPERATION NAVSHIPS 900,946 SECTION 4
?
INTENSITY
FOCUS
VERTICAL
CENTERING
HORIZONTAL
CENTERING
MARKERS
SWEEP
LENGTH
RANGE - YARDS
RANGE
SWITCH
2 AMP FUSE 3 AMP
ALARM
TYPE,,C4,?55,,,e
RANGE
STEP
wa," Au OF
Oti.,.."?1 ?:?,,,t(
Figure 4-14. Range Scope, Operating Controls
ORIGINAL
?
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A SECTION
Par. 3b(16)
NAVSHIPS 900,946
Figure 4-15. Range Markers on Range Scope
Figure 4-16. Range Step on Range Scope
TRAVEL SO AS NOT TO FORCE IT
AGAINST THE STOPS. FAILURE TO
OBSERVE THIS CAUTION WILL RESULT
IN SERIOUS DAMAGE.
(16) Turn off the range step by pushing the
RANGE STEP control in towards the panel and turn
off the MARKERS switch. Adjust the CHALLENGE
switch shown in Fig. 4-13, to the MOMENTARY posi-
tion. Hold it there for a moment and observe the
pattern on the Range Scope. A second line should
appear about three-eighths of an inch below the num-
bered scale as shown in Fig. 4-17. If it does not appear,
or if it is not in the proper position, the IFF Coordi-
nator should be adjusted by maintenance personnel.
Grass from the IFF receiver should be visible. If it is
4-12
OPERATION
Figure 4-17. IFF Sweep on Range Scope
Figure 4-18. IFF Target on Range Scope
not, set the remote IFF receiver controls inside the
door in the panel of the IFF Coordinator according to
instructions. These controls are shown in Fig. 4-14.
Release the CHALLENGE switch which should return
to the OFF position.
(17) Turn up the I.F. GAIN control shown in
Fig. 4-11 until noise or grass appears on the range
scope sweep as shown in Fig. 4-15. Set this control
at the point where the grass is 1/2 inch high on the
sweep. Then operate the HAND SLEW wheel shown
in Fig. 4-12, until a target appears on the Range Scope.
Adjust the antenna position until the target is at maxi-
mum height. Then adjust the I.F. TUNE control in-
side the door so that the target is at maximum ampli-
tude. This control should be readjusted after the set
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
OPERATION NAVSHIPS 900,946
has warmed up. The TIME CONSTANT control
should be in the No. 1 position and the BANDPASS
control should be in the BROAD position. These con-
trols are shown in Fig. 4-11. The Range Scope is now
ready for operation.
(18) If the radar target is equipped with IFF
equipment, a pattern similar to the one shown in Fig.
4-18 will be obtained, when the CHALLENGE switch
is operated to either the MOMENTARY or ON posi-
tions.
(19) Adjust the RANGE SELECTOR switch
shown in Fig. 4-7 to the 200-mile range. The number
appearing in the small opening above the RANGE
SELECTOR switch indicates the range on which the
equipment is operating.
(20) Adjust the FINE INTENSITY control
shown in Fig. 4-7 so that the line is barely visible.
Then adjust the FINE INTENSITY control and the
FOCUS control, alternately, until the line appears
sharp and just barely visible. The FOCUS control is
shown in Fig. 4-7. To obtain the proper setting of the
FINE INTENSITY conttol on any of the four ranges,
the following procedures should be used. First, turn
the VIDEO GAIN control completely counterclock-
wise. This control is shown in Fig. 4-7. Then turn
the FINE INTENSITY control counterclockwise.
Turn the INTENSITY control clockwise until a light
fuzzy picture having the appearance of grass appears
on the face of the tube. This picture should be turned
up high enough only to be barely visible. Turn the
VIDEO GAIN control clockwise until signals appear
in sharp focus, and with relatively bright illumination.
The INTENSITY control should not be adjusted
again. After a range has been set in this manner, the
operation will be incorrect if the INTENSITY control
is turned. Signals will be seen if the INTENSITY
control is turned, but the weaker signals may be lost.
(21) Turn the VIDEO GAIN control, shown in
Fig. 4-7, in a clockwise direction until echoes appear
on the face of the tube. Observe the RELATIVE
BEARING INDICATOR light on the panel. If this
lamp is lighted, it is an indication that the radar equip-
ment is operating on a relative bearing, and not on a
true bearing. The light does not glow when true
bearing operation is being employed. Adjust this
light so that while its brilliance is not annoying, it
will be visible to indicate any change in the type of
bearing being used.
(22) The face of the tube should be observed
carefully while the sweep is rotating, to make certain
that the sweep starts in the center of the tube. If not,
the equipment should be adjusted as described in the
alignment procedure in Sections 3 and 7.
(23) Turn up the MARKERS control slowly un-
til four bright dots appear along the sweep line on the
face of the tube. This control is shown in Fig. 4-7.
These will be equally spaced. If the radar antenna
is rotating, these dots will trace out four circles on the
ORIGINAL
SECTION
Par. 3b(17) 4
face of the tube, concentric with the center of the tube.
Turn the RANGE SWITCH to the other three ranges
and check to see if the dots also appear on these three
ranges. The intensity of these dots can be adjusted by
the MARKERS control. They should be adjusted so
that the lines they trace when the antenna is rotating
are as narrow and clear as possible.
(24) If the RELATIVE BEARING INDICATOR
lamp is lighted, the radar system is operating on rela-
tive bearing. If the equipment is being operated on
relative bearing, and the antenna is rotating, entire
groups of echoes will be seen to shift around the face
of the tube as the ship turns. In this type of operation,
the targets are shown on the face of the tube in rela-
tion to the ship's course. If the RELATIVE BEAR-
ING INDICATOR bulb is not lighted, the targets will
remain the same during several rotations of the an-
tenna. On this type of operation the targets are shown
in relation to North, or to some other fixed reference
point. If the ship is dead in the water (not moving
or swinging at anchor), the targets will stay in the
same position on the PPI tube face; that is, except for
normal changes in range and azimuth, due to the
movement of the target itself.
(25) Adjust the DIAL DIMMER control, shown
in Fig. 4-7, until the illumination from the lights
around the bezel permits the image on the tube face to
be seen clearly, but not bright enough to tire the eyes.
NOTE
ECHOES MAY BE SEEN ON ALL RANGES
WITHOUT READJUSTMENT OF THE IN-
TENSITY OR VIDEO GAIN CONTROLS.
BUT FOR MAXIMUM EFFECTIVENESS
THE PROPER SETTING SHOULD BE OB-
TAINED EACH TIME THE RANGE
SWITCH IS MOVED. THIS INSURES
THAT THE INTENSITY AND VIDEO
CONTROL SETTINGS WILL SHOW UP
THE WEAKER ECHOES.
(26) The CENTER EXPAND switch, shown in
Fig. 4-7 should be adjusted for proper operation. Ad-
just the RANGE SELECTOR switch for operation on
the 4-mile range, and set the VIDEO GAIN and IN-
TENSITY controls for this range. If near land, the
entire center of the tube may be a mass of echoes, and
it will not be possible to distinguish any individual
one. Turn the CENTER EXPAND switch to the ON
position. The sweep circuit will not start at the cen-
ter of the tube, but at a point about 1/2 inch from it.
This spreads out the echoes so that individual signals
may be distinguished.
(27) With the SLEWING MOTOR switch shown
in Fig. 4-12, in the OFF position, rotate the HAND
SLEW control. The TRUE BEARING or RELATIVE
BEARING indicator dials should move as the hand.
wheel is turned. These dials are shown in Fig. 4-12.
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A SECTION NAVSHIPS 900,946 OPERATION
Par. 3b(27)
The sweep on the PPI scope should also move and the
direction it indicates should always read the same as
the TRUE BEARING or RELATIVE BEARING indi-
cator dial, depending upon the type of bearing indi-
cation used by the radar equipment. If a target of
known bearing is available, the accuracy of the indi-
cator dial readings may be gauged. In order to check
the system on a target of known bearing, this target
should be maximized on the Range Scope. This is
performed by operating the antenna with the HAND
SLEW wheel. When the target extends the maximum
distance above the sweep line, the Bearing Indicator
should show the correct true or relative bearing of the
target. If it is necessary to realign the entire antenna
system, the method to follow will be determined by the
procedure applicable to the radar system as a whole.
(28) Check the automatic slew mechanism of the
Bearing Indicator. This is done by turning the SLEW,
ING MOTOR switch to all of the different positions
and checking the speed by observing the indicator
dials. This should only be done on relative bearing
operation. Otherwise, any change in the ship's course
would cause a change in the slewing rate as indicated
by the indicator dials. The speed of rotation should
be as indicated on the nameplate over the switch.
(29) If the Rotation Control Unit and Bearing
Indicator have not been modified, place the SLEWING
MOTOR switch in its OFF position. Adjust the RO-
TATION switch to its EMERGENCY position. See
Fig. 4-12. The antenna should rotate at approximately
7 r.p.m., and the dials should indicate this rotation.
Return the ROTATION switch to NORMAL position.
CAUTION
WHEN OPEARTING THE ANTENNA
FROM THE BEARING INDICATOR, DO
NOT REVERSE THE DIRECTION OF THE
HAND SLEW HANDWHEEL TOO RAP-
IDLY. DO NOT TURN THE SLEWING
MOTOR SWITCH FROM OFF TO THE
5-RPM POSITION WITHOUT ALLOW-
ING IT TO OPERATE FOR A SHORT
PERIOD OF TIME IN THE 11/4 POSITION.
DO NOT SUDDENLY REVERSE THE AN-
TENNA DIRECTION WITH THE SLEW-
ING MOTOR CONTROL. ALLOW THE
ANTENNA TO COAST TO A STOP.
THESE PRECAUTIONS ARE NECESSARY
TO PREVENT OVERLOADING THE RO-
TATION GEAR.
, (30) If the sisiem has been modified, loosen the
panel screws and pull the Bearing Indicator forward.
Close the interlock switches and with the SLEWING
MOTOR switch place the switch inside the unit in
each of its positions. The antenna should rotate as
indicated on the switch.
4-14
4. ROUTINE OPERATION.
a. GENERAL.
(1) The routine operation of the SR and SR-a
Equipments may be broken down into two classifica-
tions. These are searching operations and ranging.
operations. The following paragraphs contain a de-
scription of the recommended mechanical and electri-
cal procedure for conducting these operations.
b. SEARCHING OPERATION.
(1) This is the type of operation during which
the radar set is used to search for and observe all tar-
gets within the range of the equipment, and in an
azimuth of 360? around the ship. A limited form of
searching, sometimes called sector scanning, may also
be used. In this mode of operation, the antenna is
swept back and forth within a limited sector. The
antenna may be rotated through the entire 3600 of
azimuth by operation of the HAND SLEW wheel on
the Bearing Indicator. See Fig. 4-12. Hand operation
is only used for 360? scanning on long ranges when
the operator desires to scan slowly and stop from time
to time to observe a number of targets which are
picked up during the scanning operation. Generally,
the SLEWING MOTOR control is adjusted to one of
its four positions. In the unmodified Antenna Posi-
tioning System, this energizes the slewing motor and
regulates its speed. In this manner, the antenna can
be rotated in either clockwise (CW) or counterclock-
wise (CCW) direction automatically. Therefore, the
operator is free to observe the indicating components
for target displays. When the slewing motor is used
for PPI SEARCH the direction of the antenna should
be reversed every hour. This equalizes the wear on
the motor brushes and also prevents residual magne-
tism from building up in the servo-generators in the
associated equipment. In the modified system the
above function is performed with power obtained from
the dry disc rectifier in the Rotation Control Units.
(2) The ROTATION control on the Bearing
Indicator may be used to turn the antenna in azimuth
by placing the switch in the EMERGENCY position.
See Fig. 4-12. While this is primarily for emergency
operation, it may also be used as part of the normal
operating procedure. When the switch is in its
EMERGENCY position, the rotation control unit and
the servo-generator of the radar set are cut off. The
antenna motor is connected directly to a d-c source in
the radar equipment. This saves wear on these com-
ponents, and provides a rotation speed of approxi-
mately 7 r.p.m. This is the normal method of opera-
tion in the modified systems. Slightly improved defi-
nition on the PPI Scope is obtained in this type of
operation. With the antenna rotating at the desired
speed, targets will appear and disappear on the Range
Scope as the antenna beam sweeps across them. The
Range Scope is of little value in searching operations
except to tell when targets are present that should
appear on the PPI Scope.
ORIGINAL
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OPERATION
NAVSHIPS 900,946 SECTION A
Par. 4b(3)
Figure 4-19. Targets and Range Markers
on PPI Scope
(3) Echoes will appear on the face of the PPI
tube in the form of round dots, if the indicator is being
used in conjunction with a micro-wave radar equip-
ment. When used in conjunction with a longer-wave
set, the echo has an elongated appearance. This is due
to the beam width of the ship's radar antenna, which
is usually much narrower on the micro-wave equip-
ments. The narrower beam means that the dot appears
for a very few degrees only during the rotation of the
antenna. When the beam is wider, as on the longer-
range equipments, the dot appears for a larger number
of degrees. It thus traces out the elongated form
around the circumference which represents the target's
range, as shown in Fig. 4-19. To determine the range
of a target on the face of the PPI tube, turn up the
MARKERS switch until the four range marker rings
shown in Fig. 4-19 appear. If the antenna is not
rotating, four range marker dots appear. On the four-
mile range, these markers are 1 mile apart. On the
twenty-mile range they are 5 miles apart. They will
be 20 Miles apart on the 80-mile range, and 50 miles
apart on the 200-mile range.
(4) Adjust the RANGE SELECTOR switch (see
Fig. 4-7) to the lowest possible range on which the
target may be seen on the screen. Estimate the distance
to the target by comparing its position with the nearest
range marker. For example, if operating on the 20-
mile range, and the target is half-way between the
second and third rings, the range will be read as 121/2
miles from the ship.
(5) To obtain the proper bearing on the target,
place both hands on the cursor ring and turn it until
ORIGINAL
the line on the Plexiglass disc splits the middle of the
echo. The cursor ring is rotated by means of a con-
trol wheel on the CAY-55ADV-1 Indicator. The Plexi-
glass disc has two lines engraved on it?one on each
side. Make sure that both lines on the disc line up
with each other, as well as with the echo. This mini-
mizes parallax, which is caused by the observer looking
at the indication with his vision at an angle to the
cursor line. With the cursor lines lined up on the
target, read the bearing of the echo signal at the point
where the cursor lines appear over the graduated scale
around the rim of the PPI tube. The bearing indica-
tion will need to be interpreted in accordance with
the type of bearing on which the equipment is being
operated. If the equipment is on relative bearing the
indication will be read in azimuth with reference to
the bow of the ship. If the equipment is on true
bearing the indication will be read in azimuth with
reference to North, or some other pre-determined ref-
erence point.
(6) Unless the equipment is operated in complete
darkness, it will be advisable to use one of the filters
provided in front of the tube. The purpose of the
filter is to intensify the illumination effect of the
screen, and to ease the operator's eyes. For indoor or
daylight work, an amber filter will be found most
satisfactory. For night work, it may be desirable to
use a red filter. To insert the filter on the CAY-
55ADV, merely push it into the center of the cursor
ring so that its slots line up with the screw heads in
the ring. After the slots have been engaged, give the
filter a slight twist, locking it against the screw heads.
To replace the filter on the CAY-55ADV-1 Indicator,
unscrew the thumbscrews that hold the retaining ring
and remove the ring. The filter can then be exchanged
and the ring replaced.
(7) Small amber lights are located directly above
the fuses. These lamps normally do not light, except
to indicate a blown fuse. When one of these lights
glows, it is a sign that the fuse below it has been
blown. Replace the blown fuse with one of the spare
fuses. If the fuse was blown by something of a tran-
sient nature, the light will go out when the fuse is
replaced. However, if the fuse goes out a second time,
it means that a second fuse has blown and that some
trouble may have developed requiring repair inside
the equipment. Refer to Section 7 for methods of
correcting trouble. The convenience outlet at the top
of the PPI Indicator is provided to supply power for
test equipment or trouble lamps.
c. RANGING OPERATION.
(1) The purpose of this type of operation is to
isolate a target, or group of targets in one direction,
and to obtain accurate indications of the bearing and
range of these targets. Usually, the targets have been
located on the PPI indicator screen during a searching
operation, and it has been decided to secure more accu-
rate data concerning them. If the antenna is rotating
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4 SECTION
NAVSHIPS 900,946
OPERATION
Figure A Figure B
Good 20 Microsecond Grid Pulse Shape Good 4 Microsecond Grid Pulse Shape
Figure C
Good 1 Microsecond Grid Pulse
Figures A, B and C illustrate proper shapes of grid pulse patterns; the first hump is sufficiently high to insure a steep rise
at the point of oscillation, thus keeping the time of plate current flow just before oscillation to a minimum. The hump itself is
well below the level at which it would cause the tube to draw plate current.
T7'
?
Figure D
Poor 20 Microsecond Grid Pulse Shape
Figure E Figure F
Poor 4 Microsecond Grid Pulse Shape Poor 1 Microsecond Grid Pulse Shape
Figures D, E and F illustrate grid pulse shapes in which the hump is too high and is causing plate current to flow at the top.
If the hump were to go still higher, it would rise above the level at which the tube oscillates resulting in "multiple pulsing" and,
erratic patterns on both the grid pulse viewing scope and the indicator scopes.
Figure G
Figure H
Figure I
Poor 20 Microsecond Grid Pulse Shape Poor 4 Microsecond Grid Pulse Shape Poor 1 Microsecond Grid Pulse Shape
Figures G, H and I illustrate grid pulse shapes in which the hump is too low, causing the rise at the firing level to be too
flat, thus resulting in plate current flow for some time before oscillation begins.
4-16
Figure 4-20. Keyer Wave Forms
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
OPERATION NAVSHIPS 900,946
automatically, the SLEWING MOTOR switch should
be switched to the OFF position so that the antenna
can be operated by the HAND SLEW control. The
HAND SLEW control is operated so that the height
of the target will be as great as possible on the Range
Scope screen. If it is desired to find out whether or
not the target is friendly, the CHALLENGE switch on
the IFF Coordinator is moved to the MOMENTARY
position. See Fig. 4-13. The IFF base line will appear
on the Range Scope. If the target is friendly and
equipped with IFF equipment a signal will appear
below the radar target extending downward from the
IFF base line. See Fig. 4-18. If no such indication
appears, the radar target is an enemy target or a
friendly target not equipped to respond to the ship's
IFF equipment. Operating the CHALLENGE switch
to the ON position will also provide an IFF response
from the target. However, it is better to set the
switch to the MOMENTARY position and only hold
it there long enough to secure a convincing response
from the target. This will help prevent the enemy
from discovering the frequency of the IFF equipment.
(2) The range of the target may be roughly de-
termined by the scale on the face of the indicator tube.
More accurate indications may be secured by turning
the MARKERS switch (see Fig. 4-14) to the ON posi-
tion and comparing the position of the target with the
marker nearest to it. On the 4-mile, 20-mile, and 80-
mile ranges, the range step may be used to secure very
accurate data. To use the range step pull out the
RANGE STEP switch shown in Fig. 4-14. The step
will appear in the range sweep. The RANGE STEP
control should be turned until the left side of the
target just touches the right-hand side of the step. Do
not allow the target to walk up the step. The Correct
range may then be read from the counters when the
target is in the position described above. With the
step in this position, read the range in yards from the
range counters shown in Fig. 4-14. The RANGE STEP
switch is only effective on the 4-mile, 20-mile and 80-
mile ranges. The accuracy available from the range
step is not required on the 200-mile range.
(3) As the target moves in or out on the range
sweep, the RANGE SWITCH should be utilized to
change the range to a shorter or longer range. When-
ever this is done, the MARKERS switch should be
adjusted to the ON position and the SWEEP LENGTH
control adjusted until the markers lie behind the num-
bers on the scale on the front of the tube. This enables
the approximate range to be read from the scale.
(4) When the target is at its greatest height on
the Range Scope, the bearing may be accurately read
on the dials of the Bearing Indicator. The reading is
dependent on the type of bearing indication in use by
the radar set at the time. If the REL bearing light on
the Bearing Indicator and the RELATIVE BEARING
INDICATOR light on the PPI Indicator are illumi-
nated, the bearing indication should be read from the
ORIGINAL
SECTION 4
Par. 4c(I)
RELATIVE BEARING, or right-hand dial of the
Bearing Indicator. See Fig. 4-12. If the equipment is
being operated- on TRUE BEARING, the TRUE bear-
ing light (Fig. 4-12) will be illuminated on the Bear-
ing Indicator and the RELATIVE BEARING lamp
on the PPI Scope will be out. In this case, the bearing
should be read from the TRUE BEARING dial on the
Bearing Indicator.
(5) The IF TUNE control on the Console Re-
ceiver, shown in Fig. 4-11, requires adjustment during
the radar equipment warm-up period. It should also
be checked at regular intervals. The correct position
of this knob should be such that it will cause the target
indication on the Range Scope to be maximum at all
times. Adjustment should be made, if possible, on the
200-mile range, with the BANDPASS switch in the
SHARP position.
d. OPERATION THROUGH JAMMING.
(1) Five special anti-jamming controls are located
behind a small door on the front panel of the console
receiver. These controls are supplied for use during
different types of jamming operations which might
be directed against the radar and Console equipment.
They are shown in Fig. 4-11.
(2) The receiver rejection filters are controlled
by the two knobs, RE J 1 and REJ 2 shown in Fig. 4-11.
They consist of two sharply tuned wave-traps across
the input to the Console Receiver. In the case of
straight CW jamming, the filters may be used to keep
out, or attenuate, the CW signal which causes the
jamming. One of the controls should be adjusted
across its entire range and the JAMMING INDI-
CATOR meter observed for a reduction in its reading.
This reduction indicates that the jamming frequency
is being removed by the rejection filter. Each filter
can be tuned over one-half of the broad band-width of
the receiver. If one of the filters does not cause a
reduction of jamming signal, indicated on the JAM-
MING INDICATOR meter, try the other one. One of
them should produce ?a reduction on the JAMMING
INDICATOR meter. This filter control should be set
for maximum attenuation in the jamming signal, as
indicated by a maximum drop in the meter reading.
If the filters cause a large reduction in the jamming
signal, the operator can be almost certain that it was
a CW or MCW signal used for jamming. In this case,
the video signals should again be seen on the Range
Scope. If the jamming signal is modulated CW, the
jamming would appear as a widened sweep line, with
extremely fast or slow sine waves. Changing oper-
ating ranges may speed up or slow down these sine
waves. The widening effect on the line may be mini-
mized by accurate adjustment of the rejection filters.
(3) The BAL VIDEO control behind the door
on the Console Receiver is for use against particularly
strong railing, blocks or pulsed signals used in block-
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A SECTION NAVSHIPS 900,946 OPERATION
Par. 4d(3)
ing operations by the enemy. When adjusted properly,
this control tends to block out any strong signal and
let the weak signals ride through. Radar indications
can be seen on the Range Scope, even in the absence of
strong jamming signals, due to the fact that the height
of a strong signal is limited. If a large, saturated sig-
nal appears on the Range Scope, the control should
cause the large signal to decrease in amplitude almost
to the base line while the video signal will be seen to
ride through. The noise also should remain unaffected.
Thus, in the presence of strong blocking signals, it
should be possible to make the video signals come
through and appear on the Range Scope. The opera-
tion of this control will not affect the JAMMING
INDICATOR meter. Adjustment should be made
while observing the pattern on the Range Scope tube.
(4) THE TIME CONSTANT control is located
inside the door on the panel of the console receiver as
shown in Fig. 4-11. It is also useful when jamming
signals are present. It should be set in such a manner
that signals or jamming blocks are allowed to build
up quickly and die down at a rate which makes it
possible to see video indications on the Range Scope.
In the wide time constant position, or position No. 3,
the normal picture appears on the Range Scope. In
the medium, or position No. 2, the blocking pulse will
build up quickly and die down at a relatively slow
rate. In the normal position No. 1, the blocking pulse
rises to its full height very rapidly, then drops to
approximately half its height and remains at this level
for the duration of the pulse. The blocking pulse is
therefore allowed to saturate the screen for only a very
small part of its duration. In this manner, the pulse
may be broken up into a series of small blocks. The
action of the control changes these to very narrow
spikes, and the radar video signal will ride through
the spikes and be seen on the scope.
(5) The I.F. TUNE control and the BANDPASS
control, shown in Fig. 4-11, may be used together to
help eliminate jamming. When the BANDPASS con-
trol is in the BROAD position, the band width of the
receiver is about 1.5 megacycles. When it is in the
MEDIUM position, the band width is about 500 kilo-
cycles and when in the SHARP position, about 250
kilocycles. The reduction of the bandwidth may cut
out a jamming signal which might otherwise be
allowed to pass through the BROAD bandpass, but is
outside the limits of the narrow bandpasses. The I.F.
TUNE control enables the operator to locate the nar-
rowed bandpass at any point within the 1.5 megacycle
bandwidth. When the control is set for one end of
the range, it will permit signals within 250 kilocycles
at that end of the band to pass through the receiver
channels. All other signals will be excluded. Conse-
quently, by operation of this control, the i-f channel
of the receiver may be adjusted so that it will exclude
the undesired signal while passing the radar echo
4-18
through to the receiver circuits. This rejection control
will be generally successful if the jamming frequency
falls within the total BANDWIDTH, yet does not fall
exactly on the frequency of the radar transmitter.
5. TRANSMITTER TUNING PROCEDURE.
a. GENERAL.
(1) It is the responsibility of operating perionnel
to keep the transmitter correctly tuned. This requires
frequent checks with the Echo Box and, in the case of
the SR transmitter, frequency checks on the appearance
of the keying waveform with a general purpose test
oscilloscope. The following paragraphs give tuning
instructions in a simple step-by-step procedure. With
the exception of the Keyer the procedures for the SR
and SR-a are very similar.
b. TUNING THE SR TRANSCEIVER.
(1) Check the number and placement of the grid
straps used on the transmitting oscillator. For the blue
antenna two straps are required. The yellow-green
antenna requires only the bottom strap with corona
balls attached to the tube pins that customarily hold
the other strap.
(2) Adjust the duplexer length so that the dis-
tance between the lower flange of the upper U-shaped
casting and the center of the spark-gap adjusting knob
is 97/8 inches for the blue band and 115/8 inches for the
yellow-green band.
(3) Adjust the spark gaps for a spacing of 2 to
Vic of an inch between the points. This is equivalent
to one full turn of the adjusting knob from its fully
closed position. The spark gaps may be seen when
the Monitor Receiver is removed from its compart-
ment.
(4) Place the CONTROL switch S-107 in its
LOCAL position.
(5) Determine the approximate settings of the
OSCILLATOR TUNING, 1st TUNING STUB, and
2nd TUNING STUB controls from the calibration
chart on the oscillator door on the Transceiver. Set
these controls to the values given. See Fig. 4-3.
(6) Place the PULSE LENGTH control S-158 on
the Keyer in its 20 position. This control is shown in
Fig. 4-4.
(7) Energize the equipment as directed in Par. 2
of this section.
(8) Connect a general purpose oscilloscope to test
jack J-106 and to ground. Use the internal sweep
frequency of the oscilloscope and adjust it as nearly
as possible to the repetition rate. Stop the pattern
on the scope with the sync control. J-106 is on the
front panel of the Transceiver near the POWER
switch.
(9) Place the RADIATION switch S-108 in its
ON position and press the RAISE switch until the
PLATE VOLTAGE meter indicates 11 kv. or as near
to this voltage as possible. These Controls are shown
in Fig. 4-3.
ORIGINAL
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OPERATION NAVSHIPS 900,946
(10) If tuning an unmodified SR Transceiver,
adjust the 20-L and 20-R adjustments on the Keyer
until the ideal waveform shown in Fig. 4-20 is obtained
on the test oscilloscope. Change the 20-R adjustment
one step and then vary the 20-L adjustment over its
range. Continue this operation until the ideal wave-
form is obtained. If the overload relay trips, back the
20-R control off one step and readjust the 20-L control.
The positive peak of the waveform should be at least
15 per cent of the overall waveform amplitude. This
peak is the dimension D in the figure and the overall
amplitude is the dimension E in Fig. 4-20. The top of
the waveform should be sharply peaked. If the R
adjustments are properly made it should be possible to
vary the L adjustments over three or four taps before
unstable operation occurs. If several humps appear
between points a and b in Fig. 4-20 while operating
with the PULSE LENGTH control in the 20 position,
the waveform is not incorrect. These humps are
caused by the 60 cps external synchronizing voltage.
(11) Place the ON-OFF switch on the Monitor
Receiver in its ON position. See Fig. 4-10. If the
Echo Box has not been modified, tune the ECHO BOX
TUNE control for maximum indication on the ECHO
BOX RESONANCE meter. If the Echo Box has been
modified, tune for a sharp dip. Tune far enough over
the range to insure that the Echo Box is not tuned to a
false peak. In either case the frequency of the trans-
mitter is determined from the Echo Box calibration
chart which shows dial settings versus frequency. The
frequency should be within plus or minus five mega-
cycles of the center of the band. The center of the
yellow-green band is 190 megacycles per second and
the center of the blue band is 220 megacycles per
second.
(12) If the frequency as determined in step (11)
is incorrect, adjust the OSCILLATOR TUNING (A)
control shown in Fig. 4-3, and repeat step (11). Re-
peat this operation until the correct frequency is ob-
tained. As a rule, tuning the (A) dial to higher num-
bers lowers the frequency. Tune for the largest peak
on the ECHO BOX RESONANCE meter that lies in
the frequency band of the Antenna. It is important
that the Keyer waveform be checked each time that
the frequency is changed.
(13) Adjust the 1st TUNING STUB (B) dial.
and the ECHO BOX TUNE (G) dial alternately for
maximum deflection on the ECHO BOX RESO-
NANCE meter. If the Echo Box has been modified,
it must be detuned slightly for this operation. If the
grid waveform changes during this operation, readjust
the L and R controls on the Keyer and then continue
with the adjustment of the (B) and (G) dials.
(14) Repeat step (13) using the 2nd TUNING
STUB (C) dial and the (G) dial.
(15) Repeat steps (13) and (14).
(16) Place the RADIATION switch in its OFF
ORIGINAL
SECTION 4
Par. 5b(10)
position and place the PULSE LENGTH switch on the
Keyer in its 4 position. Then place the RADIATION
switch in its MOMENTARY position for a brief
period of time and observe the waveform of the grid
pulse. Compare its shape with those shown in Fig. 4-20.
(17) Adjust the 4-R and 4-L controls shown in
Fig. 4-4, using the technique described in step (10).
Do not disturb the setting of any other controls during
this operation.
(18) Repeat steps (16) and (17) using the 1
position of the PULSE LENGTH switch and the 1-
R and 1-L controls shown in Fig. 4-4. Check the grid
pulse against the 1-us waveforms shown in Fig. 4-20.
(19) Adjust the Monitor Scope using steps (1)
to (5) inclusive of Par. 3b of this section.
(20) Place the PULSE LENGTH switch in its 20
position and place the RADIATION switch in its ON
position.
(21) Set the RF control on the Monitor Receiver
to its 0 position and set the IF GAIN control at 100.
These controls are shown in Fig. 4-10. As the tuning
proceeds in the following steps, reduce the setting of
the IF GAIN control to prevent saturation of the
Monitor Scope.
(22) Adjust the RECEIVER TUNE (F) dial un-
til target echoes appear on the Monitor Scope.
(23) Adjust the 2nd DUPLEXER (E) dial for
maximum amplitude on the Monitor Scope and then
. adjust the 1st DUPLEXER (D) dial in the same
manner.
(24) Adjust the RF control for maximum ampli-
tude on the Monitor Scope.
(25) Adjust the knurled knobs on the spark gaps
in the duplexers until the amplitude on the Monitor
Scope is maximum and the spark is clean and blue.
These adjustments are accessible when the rear panel
of the Transceiver is removed. The outer conductors
of the r-f lines in the Transceiver are at ground poten-
tial and may be handled with safety. DO NOT
TOUCH ANY OTHER PART OF THE TRANS-
CEIVER.
(26) Carefully trim the adjustment of the 2nd
TUNING STUB (C), RECEIVER TUNE (F), 2nd
DUPLEXER (E), 1st DUPLEXER (D) and the RF
control in the order given.
(27) Check the transmitter frequency with the
Echo Box. If it has shifted beyond the limits during
the tuning procedure, readjust the OSCILLATOR
TUNING (A) dial to obtain the correct frequency
and repeat the entire tuning procedure.
(28) Make a final check to see that the Trans-
ceiver operates correctly on all three pulse lengths and
repetition rates. Turn the RADIATION switch OFF
when switching from one pulse length to another.
(29) Read and record the settings of all controls
adjusted during the tuning procedure. Also record the
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A SECTION
Par. 5b(29)
NAVSHIPS 900,946
meter readings. The meter indications should closely
approximate the following:
PULSE
PLATE
CATHODE
GRID
LENGTH
VOLTS
CURRENT
CURRENT
20
11 kv.
35-55 ma.
10-13 ma.
4
11 kv.
30-40 ma.
6- 9 ma.
1
11 kv.
15-25 ma.
2- 4 ma.
c. TUNING THE SR-a TRANSCEIVER.
(1) The only difference in the tuning procedures
of the SR and SR-a equipments is the elimination of
the Keyer adjustments and the substitution for them
of the repetition rate adjustment of the Modulator.
The following procedure assumes that the equipment
has been energized up to the point where the high
voltage circuits are ready to be energized.
(2) Place the RADIATION switch in the ON
position.
(3) Press the RAISE switch until the PLATE
VOLTAGE meter indicates 3.5 kv.
(4) Tune the transmitter as previously described
in Par. 5b of this section.
(5) Adjust the repetition rate of the Modulator
if the frequency is not 120 cps. Connect the 60 cps
line voltage to one set of deflection plates on the oscil-
loscope and connect the output from J-2004 to the
other set of plates. Adjust the REP RATE control
R-2001 (see Fig. 4-21) until a two-to-one Lissajou.
pattern is obtained. This indicates that the repetition
rate is twice the line frequency. Another good indi-
cation of the correct repetition rate is the behaviour
of targets on the Monitor Scope. At 120 cps the tar-
gets are steady. At other frequencies they jitter back
and forth horizontally at a frequency equal to the dif-
ference between 120 cps and the actual repetition
frequency.
OPERATION
Figure 4-21. Modulator Adjustments
(6) Increase the plate voltage to five kv. and
check all measurements. This completes the tuning
procedure.
TABLE 4-1
OPERATING ADJUSTMENTS
Control
Location
Instructions
Pushbutton Station
Switch S-1461
VOLT ADJ RHEO
Rheostat R-1466
CONTROL switch
EMERGENCY MAIN
POWER switch
Voltage Regulator
Voltage Regulator
Voltage Regulator
Transceiver
Transceiver
ON during operation. Can be left on
during shutdown.
START button starts Motor Generator.
STOP button stops it.
Place in AUTO position for automatic
voltage regulation. Place in MAN position
for Manual voltage regulation.
Adjust for 120 v. in AUTO operation.
Adjust for 120 v. in MAN operation.
Place in LOCAL or REMOTE positions as
desired.
Place in ON position to energize primary
power circuits.
4-20
ORIGINAL
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OPERATION NAVSHIPS 900,946 SECTION 4
TABLE 4-1 (Continued)
OPERATING ADJUSTMENTS
Control
Location
Instructions
PULSE LENGTH
FILAMENT VOLTAGE
FILAMENT VOLTAGE
meter POWER ON
RAISE switch
LOWER switch
PLATE VOLTAGE meter
ON-OFF switch
INDICATOR CONSOLE
switch
ON-OFF switch
RADIATION switch
ECHO BOX ON-OFF
ECHO BOX TUNE
CATHODE CURRENT
meter
GRID CURRENT meter
SYNCHRO SYSTEM
SERVO GEN. MOTOR.
ANT. TRAIN MOTOR
REMOTE INDICATORS
Keyer Unit
Transceiver
Transceiver
Transceiver or General Control Unit
Transceiver or General Control Unit
Transceiver or General Control Unit
Transceiver or General Control Unit
Monitor Scope
General Control Unit
PPI Indicator
Transceiver and General Control Unit
Monitor Receiver
Monitor Receiver
Transceiver
Transceiver
Rotation Control Unit
Rectifier Power Unit
Rectifier Power Unit
Rotation Control Unit
Set to 20 for long range; 4 for medium range;
1 for short ranges.
Adjust for 10 v. on FILAMENT VOLTAGE
meter. Should indicate 10 v.
Press to energize high voltage circuits.
Press to increase oscillator plate voltage.
Press to decrease oscillator plate voltage.
Indicates 11 kv on SR; 5 kv on SRa.
Place on ON position to energize Monitor
Scope.
Place in ON position to energize all Indi-
cator Console Units except PPI.
Place in ON position to energize PPI Indi-
cator.
ON for continuous radiation; MOMENTARY
for intermittent operation.
Place in ON position to energize Echo Box.
Unmodified:? Tune for maximum ampli-
tude for frequency indication;
Modified:?Tune for dip. To measure power,
detune and make adjustments for maximum
amplitude.
SR:-20 p.s-35 to 55 ma; 4 [Ls-30 to 40 ma;
1 p.s-15 to 25 ma.
SR-a:-20 to 30 ma.
SR:-20 tis-10 to 13 ma; 4 p.s-6 to 9 ma;
1 (is-2 to 4 ma.
SR-a:-4 to 8 ma.
Place in OSC position for true bearing;
AC position for relative bearing.
Place in ON position to start Servo Gene-
rator.
ON to energize armature of antenna drive
motor.
ON to supply data voltage to Indicator
Console and remote PPI units.
ORIGINAL
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4 SECTION NAVSHIPS 900,946 OPERATION
TABLE 4-1 (Continued)
OPERATING ADJUSTMENTS
Control
Location
Instructions
ON-OFF switch
SYNCHRO AMPLIFIER
POWER switch
V CENTER
H CENTER
SWEEP LENGTH
FOCUS
INTENSITY
RANGE SELECTOR
RECEIVER TUNE
RF
IF GAIN
VIDEO GAIN
PPI MARKERS
ECHO BOX switch
INTENSITY
FOCUS
HORIZONTAL
CENTERING
VERTICAL
CENTERING
RANGE SWITCH
MARKERS
SWEEP LENGTH
RANGE STEP
CHALLENGE
Rectifier Power Unit
Synchro Amplifier
Monitor Scope
Monitor Scope
Monitor Scope
Monitor Scope
Monitor Scope
Monitor Scope
Monitor Receiver
Monitor Receiver
Monitor Receiver and Console
Receiver
Monitor Scope
Console Receiver
Console Receiver and Monitor
Receiver
Range Scope
Range Scope
Range Scope
Range Scope
Range Scope
Range Scope
Range Scope
Range Scope
IFF Coordinator
ON to energize unit.
ON to energize Synchro Amplifier.
Adjust until sweep coincides with etched line.
Adjust until sweep starts at 0 on etched
line with VIDEO GAIN at 0.
Adjust until length of sweep equals length
of etched line.
Adjust for sharp definition.
Adjust for desired brilliancy.
Set to desired range; usually 20 miles.
Tune for maximum amplitude on Monitor
Scope.
Tune for maximum amplitude on Monitor
Scope.
Adjust for M inch grass on Range Scope.
Adjust for desired amplitude.
ON to supply markers to remote PPI units.
ON to energize Echo Box.
Adjust for desired intensity.
Adjust for sharp definition.
Adjust start of sweep over 0 on scale.
Adjust sweep inches above scale.
Set to desired range.
ON when markers are desired.
Adjust until markers coincide with numbers.
Pull out for range step. Rotate to align
step with target.
MOMENTARY or ON to interrogate target.
4-22
ORIGINAL
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OPERATION NAVSHIPS 900,946 SECTION 4
TABLE 4-1 (Continued)
OPERATING ADJUSTMENTS
Control Location
RANGE SELECTOR
FINE INTENSITY
FOCUS
VIDEO GAIN
MARKERS
DIAL DIMMER
CENTER EXPAND
CURSOR
FILTER
BANDPASS
IF TUNE
REJ 1
REJ 2
BAL VIDEO
TIME CONSTANT
ROTATION
HAND SLEW
SLEWING MOTOR
OSCILLATOR TUNING
1-, 4-, and 20-R
1-, 4-, and 20-L,
1st TUNING STUB
2nd TUNING STUB
2nd DUPLEXER
1st DUPLEXER
Spark Gap Controls
REPETITION RATE
POWER OFF
PPI Indicator
PPI Indicator
PPI Indicator
PPI Indicator
PPI Indicator
PPI Indicator
PPI Indicator
PPI Indicator
PPI Indicator
Console Receiver
Console Receiver
Console Receiver
Console Receiver
Console Receiver
Console Receiver
Bearing Indicator
Bearing Indicator
Bearing Indicator
Transceiver
Keyer Unit
Keyer Unit
Transceiver
Transceiver
Transceiver
Transceiver
Transceiver (interior)
MODULATOR
Transceiver
Instructions
Set to desired range.
Adjust until sweep is just visible.
Adjust for best definition.
Adjust alternately with FOCUS and FINE
INTENSITY.
Adjust for desired marker brilliance.
Adjust for desired illumination.
ON to separate nearby targets.
Align cursor with target, read bearing on
scale under cursor.
Use amber for daylight and indoor; red for
open bridge and night.
Adjust to bandwidth necessary to eliminate
jamming.
Tune for best target each time BAND-
PASS is changed.
Adjust for maximum dip on JAMMING
INDICATOR. Use against CW and MCW
jamming.
See REJ 1.
Adjust to eliminate pulse, railing, etc.
Adjust to reduce the effect of pulsed signals.
NORMAL position unless EMERGENCY
operation is desired.
Rotate to manually control antenna.
Set to desired antenna speed and direction.
Adjust for desired frequency.
Adjust for best waveform.
Adjust for best waveform.
Adjust for maximum deflection on Echo Box.
Adjust for maximum deflection on Echo Box.
Tune for maximum amplitude on Monitor
Scope.
Tune for maximum amplitude on Monitor
Scope.
Adjust for clean blue spark.
Adjust for 120 cps.
Press to remove high voltage.
ORIGINAL
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C SECTION NAVSHIPS 900,946 OPERATOR'S MAINTENANCE
Par. la
SECTION 5
OPERATOR'S MAINTENANCE
1. GENERAL
a. The procedures described in this section are for
the use and guidance of operating personnel. They
are supplementary to the maintenance procedures that
must be performed by maintenance personnel. By
means of the simple tests and procedures described in
this section, the operator can perform simple preven-
tive maintenance of a mechanical nature, replace fuses,
determine the operating conditions for the purpose of
entering data in a daily log, and in emergencies, effect
certain electrical repairs. Operating personnel should
not make any extensive or complicated repairs since
special test equipment, tools, replacement parts, and a
high degree of technical knowledge, skill and experi-
ence are required.
2. ROUTINE CHECKS.
a. The operator should perform certain routine
checks each day. These checks should consist of tests
to determine if the equipment is performing satisfac-
torily, and mechanical inspection to determine the gen-
eral condition of the equipment. It is recommended
that routine checks be made at the beginning of each
watch and data such as frequency meter readings, pulse
length, repetition rate, and bandwidth selected, be
recorded in a daily log book. The following para-
graphs describe in detail the methods and procedures
to be used. Table 5-1 shows the steps that should be
performed.
3. MECHANICAL CHECKS.
a. At the beginning of each watch, check all assem-
bly bolts, studs and screws that are visible on the
exterior of the various components. Usually a cursory
examination will disclose anything of an unusual na-
ture and the entire procedure will actually require very
little time. Particular attention should be given the
bondings on the shockmounts, since there is always a
possibility that they might become frayed or broken
through carelessness during cleaning. The condition
of all cabling should be inspected periodically and any
.repairs or replacements indicated by the inspection
should be immediately reported. Examine the panel
thumbscrews that hold the units in the cabinets. If a
unit is loose in the cabinet, it might slide out until
stopped by the latches when the ship rolls. In this case
the interlocks would open and the equipment would
not operate. The condition of the paint on the various
components should be inspected. If the painted sur-
face is scratched or rusty this condition should be
reported since unpainted metal corrodes easily in salt
air.
b. The control knobs should also be inspected to see
that none of them are broken or loose and that the
control shafts are not bent. On the units with locks
for the control knob, check to see that the locks are
in good condition and that none of them have become
loosened. A loose lock may mean that the control is
out of adjustment and this should be determined as
soon as the equipment is energized. When the equip-
ment is first energized, observe each fuse warning lamp
to see that all of the fuses are in good condition. If a
viewing shield is used on the Range Indicator check
its condition to see if it fits properly and remains
firmly in place after it is attached. Observe the action
of all switches when the equipment is turned on to
see whether they are in good condition or whether
they are worn and require replacement. Check the
action of all operating controls to see that they per-
form their functions correctly.
TABLE 5-1
UNDERWAY EACH WATCH
What to Check
How to Check
Precautions
1. High Voltage
2. Filament Voltage
3. Cathode Current
4. Grid Current
Read PLATE VOLTAGE Meter on Trans-
ceiver or General Control Unit. Record
Voltage.
Read FILAMENT VOLTAGE Meter on
Transceiver and record.
Read CATHODE CURRENT Meter on
Transceiver and record.
Read GRID CURRENT meter on Trans-
ceiver and record.
5-0
ORIGINAL
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OPERATOR'S MAINTENANCE NAVSHIPS 900,946 SECTION 5
UNDERWAY?EACH WATCH
TABLE 5-1 (Continued)
What to Check
How to Check
Precautions
5. Transmitter Freq.
6. Service Hours
7. Transmitter Controls
8. Pulse ShaVe (SR only)
9. Mechanical Inspection
10. Fuses
11. Motor Generator
12. Servo Generator
13. Magnetic Controller
14. Voltage Regulator
15. Synchro Amplifier and
Synchro Unit
16. Rotation Control Unit
17. Modulator (SR-a only)
18. Antenna Pedestal and
Antennas
19. Power Supply. Main
Power Switch on.
Measure with Echo Box and record twice
daily. (See Par. 5 of Section 4).
Read SERVICE HOURS Meter on Trans-
ceiver at beginning of watch and again if a
failure occurs. Record readings.
Record settings of controls at beginning of
watch. Record any changes made during
watch with appropriate explanation.
Observe on Monitor Scope. If necessary,
observe on test scope.
Check panel screws, mountings assembly
bolts, meter glasses, controls, paint, cabling
and connectors.
Check fuses and fuse warning lamps when
a-c power is applied.
Should be running smoothly and quietly.
Check lubrication of bearings. Oil cups
should be filled.
See above.
Make mechanical inspection. Note if relays
have tendency to chatter.
Record meter reading and type of operation
in use. Make mechanical inspection.
Make mechanical inspection. Check pilot
lamps, both should be glowing.
Make mechanical inspection. Check fuses.
Make mechanical inspection and check fuses.
Check repetition rate adjustment by noting if
targets jitter horizontally on Range Scope.
Make mechanical inspection and clean de-
posits of soot and salt from dipoles and insu-
lators.
Place the Indicator Console and the PPI
ON-OFF switches in ON position. Lamp
above PPI switch should glow. Traces
should appear on scopes.
Pedestal must be in stowed position
with stowing lock engaged.
ORIGINAL
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5-1
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5 SECTION NAVSHIPS 900,946 OPERATOR'S MAINTENANCE
UNDERWAY?EACH WATCH
TABLE 5-1 (Concluded)
What to Check
How to Check
Precautions
20. Dial Lamps
21. Focus and Intensity
22. Range Markers
23. Sweep Length
24. Center Expand on
PPI Scope
25. Video
26. IFF
27. IFF Video
28. Bearing Indicator and
General Control Unit
29. Range Step on Range
Scope
Advance DIAL DIMMER control on PPI
Unit. MILES window and azimuth scale
should be illuminated. MILES window
and RANGE-YARDS windows on Range
Scope should be illuminated. Dials on
Bearing Indicator should be illuminated
if on true bearing.
Examine sweep on scopes. They should
be sharp and thin and just bright enough
to be seen..
Turn the RANGE switches on each of the
scopes to each of their four positions and
advance MARKER controls. Four marker
dots should appear on sweep for each
position. Dots on each range should
coincide with dot positions on each of
the other ranges on PPI scope. SWEEP
LENGTH control will have to be adjusted
for each range on Range Scope.
Turn RANGE SELECTOR switch to each
position and advance MARKER control.
Sweep should end with fourth marker dot.
Sweep should start at center and end M
inch from edge of tube on PPI scope.
Sweep on Range Scope should start on 0
and end on 8.
Operate CENTER EXPAND switch. Sweep
should shift about .5 inch radially from
center of tube.
Advance I.F. GAIN control on Console
Receiver. Target and noise amplitude on
Range Scope should increase as long as
control can be turned.
Advance VIDEO GAIN control on PPI
scope. Target and noise intensity should
increase as long as control can be turned.
Hold CHALLENGE switch in MOMEN-
TARY POSITION. IFF trace should ap-
pear on Range Scope.
Advance IFF REC GAIN control. Noise
amplitude should increase as long as con-
trol can be turned.
Check these units by turning on the entire
equipment. Use REMOTE operation.
Pull out RANGE STEP control, check
accuracy of step against markers and check
zero setting.
See par. 5 of this section before
replacing lamps.
Do not attempt to adjust the range
marker circuits. Spectal equipment
is required.
Report failure or rough controls
to repair personnel.
Report failure to maintenance per-
sonnel.
Report faulty controls to repair
personnel.
/Th
Do not force RANGE STEP control
against stops at each end of range.
5-2
ORIGINAL
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OPERATOR'S MAINTENANCE NAVSHIPS 900,946 SECTION C
Par. 4a 'Iv
Figure 5-1. Transceiver Fuses
ORIGINAL
4. FUSE REPLACEMENT.
a. A blown fuse is indicated by the FUSE ALARM
lamp directly above it. If a FUSE ALARM lamp is
illuminated, the fuse beneath should be replaced. The
fuses and the alarm lamps of the various components
are shown in Figs. 5-1 to 5-12 inclusive. They are
listed in Table 5-2. Symptoms are given for the fuses
that have no fuse alarm lamps.
WARNING
NEVER REPLACE A FUSE WITH ONE OF
HIGHER RATING UNLESS CONTINUED
OPERATION OF THE EQUIPMENT IS
MORE IMPORTANT THAN PROBABLE
DAMAGE. IF A FUSE BURNS OUT IM-
MEDIATELY AFTER REPLACEMENT, DO
NOT REPLACE IT A SECOND TIME
UNTIL THE CAUSE OF THE TROUBLE
HAS BEEN CORRECTED.
Figure 5-2
Monitor Scope Fuses
Figure 5-3
Monitor Receiver
Fuses
Figure 5-4
Rectifier Power Unit
Fuses
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5 SECTION NAVSHIPS 900,946 OPERATOR'S MAINTENANCE
Figure 5-5
Console Receiver
Fuses
Figure 5-6
1FF Coordinator Fuses
COMMUTATOR COMMUTATOR COMMUTATOR AMPLIFIER
TRANS. SEC. TRANS. SEC. TRANSMITTER SUPPLY
1 SPEED 36 SPEED PRIMARY
\
,
i LIA. _/,
1111 ''', "I A _
I F11
i
NII lull III II I 11111 'Ifil 11-11
4
II,I III
f/A, 111
Ir I II I II I If I II I r II I
L
11111
1 ?
till I 1
liale217.;:*
imb
? it.
1111111p
Ohs moirm.
-131-
Figure 5-8. Synchro Amplifier Fuses
FUSE
ALARM
FUSE
ALARM
2 AMP
LATra tae4P:o
woic;Avree
Figure 5-9. PPI Indicator Fuses
FUSE
ALARM
5-4
Figure 5-7 Modulator Fuses
Figure 5-10. Servo Amplifier Fuses
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
'OPERATOR'S MAINTENANCE NAVSHIPS 900,946 SECTION 5
Figure 5-11. Bearing Indicator Fuses
Figure 5-12. Range Scope Fuses
TABLE 5-2
FUSE LOCATIONS
Fuse and Value
Location
Function
Test Point or Symptom
F-101A, 250 V., 40 amps.
Fuse panel, lower left com-
partment, Transceiver.
Plate Supply
No plate voltage
F-102A, 250 V., 40 amps.
Fuse panel, lower left com-
partment, Transceiver.
Plate Supply
No plate voltage
F-103A, 250 V., 20 amps.
Fuse panel, lower left com-
partment, Transceiver
Filament Supply
No filament voltage
F-104A, 250 V., 20 amps.
Fuse panel, lower left com-
partment, Transceiver
Filament Supply
No filament voltage
F-105A, 250 V., 20 amps.
Fuse panel, lower left com-
partment, Transceiver
Voltage Regulator Input
No A-C voltage_at Indi-
cator Console
F-106A, 250 V., 20 amps.
Fuse panel, lower left com-
partment, Transceiver
Voltage Regulator Input
No A-C voltage at Indi-
cator Console
F-107A, 250 V., 20 amps.
Fuse panel, lower left com-
partment, Transceiver
Blower Motor
Blower Motor won't run
F-108A, 250 V., 3 amps.
Fuse panel, lower left com-
partment, Transceiver
Variac Drive Motor
Drive Motor won't run
to increase H.V.
F-109A, 250 V., 20 amps.
Fuse panel, lower left com-
partment, Transceiver
H.V. Primary
No plate voltage
F-110A, 250 V., 20 amps.
Fuse panel, lower left com-
partment, Transceiver
H.V. Primary
No plate voltage.
F-201A, 250 V., 2 amps.
Monitor Receiver, front panel
Power Supply primary
Fuse alarm lamp 1-201
F-202A, 250 V., 2 amps.
Monitor Receiver front panel
Power Supply primary
Fuse alarm lamp 1-202
F-301A, 0.25 amp.
Monitor Scope front panel
H.V. Primary
Fuse alarm lamp 1-301
F-302A, 3 amps.
Monitor Scope front panel
L.V. Primary
Fuse alarm lamp 1-302
F-500A, 3 amps.
Front panel PPI Scope
L.V. primary fuse
Fuse alarm lamp 1-500
F-501A, 3 amps.
Front panel PPI Scope
H.V. primary fuse
Fuse alarm lamp 1-501
F-502A, 2 amps.
Front panel PPI Scope
Yoke motor fuse
Fuse alarm lamp 1-502
F-600A, 3 amps.
Front panel Range Scope
L.V. primary fuse
Fuse alarm lamp 1-600
ORIGINAL
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5-5
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5 SECTION
NAVSHIPS 900,946
TABLE 5-2 (Concluded)
FUSE LOCATIONS
OPERATOR'S MAINTENANCE
Fuse and Value
Location
Function
Test Point or Symptom
F-601A, 2 amps.
F-701A, 2 amps.
F-702A, 2 amps.
F-801A, 2 amps.
F-802A, 2 amps.
F-901A, 2 amps.
F-902A, 2 amps.
F-1101A, 250 V., 3 amps.
F-1102A, 250 V., 8 amps.
F-1103A, 250 V., 8 amps.
F-1441, 250 V., 10 amps.
F-1451, 250 V., 10 amps.
F-1571, 250 V., 200 amps.
F-1572, 250 V., 200 amps.
F-1581, 250 V., 10 amps.
3 amps.
3 amps.
10 amps.
10 amps.
10 amps.
10 amps.
15 amps.
15 amps.
Front panel Range Scope
Front panel Receiver
Front panel Receiver
Front panel Bearing Indicator
Front panel Bearing Indicator
Front
Front
Servo
Panel
panel IFF Coordinator
panel IFF Coordinator
Amplifier Unit Front
Servo Amplifier Unit Front
Panel
Rectifier Power Unit Front
Panel
Magnetic Contro;ler
Magnetic Controller
Line Switch
Line Switch
Magnetic Controller
Junction Box Synchro Ampli-
fier
Junction Box Synchro Ampli-
fier
Junction Box Synchro Ampli-
fier
Junction Box Synchro Ampli-
fier
Junction Box Synchro Ampli-
fier
Junction Box Synchro Ampli-
fier
Junction Box Synchro Ampli-
fier
Junction Box Synchro Ampli-
fier
H.V. primary fuse
Primary fuse power sup.
Primary fuse power sup.
Primary fuse power sup.
Primary fuse power sup.
Primary fuse power sup.
Primary fuse power sup.
Power Supply
Synchrotie
Rectifier Transformer
primary
Control fuse
Control fuse
Main Power
Main Power
Control fuse
Amplifier power supply
Amplifier power supply
Relayed 1-speed
Relayed 1-speed
Relayed 36-speed com-
pass
Relayed 36-speed com-
pass
Commutator primary
Commutator primary
Fuse alarm lamp 1-601
Fuse alarm lamp 1-701
Fuse alarm lamp 1-702
Fuse alarm lamp 1-801
Fuse alarm lamp 1-802
Fuse alarm lamp 1-901
Fuse alarm lamp 1-902
Fuse alarm lamp I-1101
Fuse alarm lamp I-1102
Fuse alarm lamp I-1103
Motor Generator won't
start
Motor Generator won't
start
No power available
No power available
Motor Generator won't
start
Commutator drive motor
doesn't run. Tubes dark
Commutator drive motor
doesn't run. Tubes dark
1-speed
erative
1-speed
erative
36-speed
erative
36-speed
erative
circuits mop-
circuits mop.
circuits mop-
circuits mop-
No relayed voltages
No relayed voltages
5-6
ORIGINAL
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OPERATOR'S MAINTENANCE NAVSHIPS 900,946 SECTION 4
Par. 5a ".
5. DIAL LIGHT REPLACEMENT.
a. To replace the dial lights behind the cursor
assembly on the PPI Indicator, unscrew the two large
thumbscrews on the right-hand side of the cursor
frame. Swing the hinged assembly away from the
panel. This exposes the lamps and they can easily be
replaced. See Fig. 5-13.
Figure 5-13. Dial Lamps in Geared Cursor
b. To replace the dial lamps behind the hand oper-
ated cursor assembly on the unmodified PPI Indicators,
unscrew the three thumbscrews on the front of the
cursor assembly. Pull the assembly away from the
front panel and remove the phone plug on the left-
hand side behind the panel. Pull the two frames as
far apart as the nuts on the thumbscrews permit, after
which the dial lamps can be removed. See Fig. 5-14.
Figure 5-14. Dial Lamps in Manual Cursor
ORIGINAL
c. To replace the dial lamp behind the MILES win-
dows, unscrew the eight panel thumbscrews and slide
the chassis out until it locks. The dial lamp is acces-
sible from the right-hand side as shown in Fig. 5-15.
After replacing the lamp, release the chassis lock by
pressing the pushbuttons, and slide the chassis back
into the case. All other lamps are replaced by un-
screwing the jewel over the lamp and twisting the
bulbs out of and into the sockets.
Figure 5-15. Dial Lamp Behind MILES Window
on PPI Indicator
d. The dial lamps behind. the RANGE-YARDS
window on the Range Scope become accessible when
the bezel is removed as shoWn in Fig. 5-16. The bulbs
are encased in a metal cover to which is attached a
bent lucite rod to carry the light over to the counter
dials. The metal cover is easily removed by pulling it
off the lamp base assembly. With the cover removed,
the lamps may be twisted out of their sockets and new
lamps inserted. The cover assembly is then replaced
and the bezel reassembled to the panel and secured
with its captive thumb screws.
e. The lamp behind the MILES window on the
Range Scope is not so easily removed. To remove it,
loosen the f Dint panel thumbscrews and pull the
chassis forward from its case until the locks are en-
gaged. The lamp is mounted on a frame gusset on the
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C SECTION
I? Par. Se
NAVSHIPS 900,946 OPERATOR'S MAINTENANCE
Figure 5-16. Dial Lamp Behind RANGE?YARDS
Window on Range Scope
left-hand side as shown in Fig. 5-17. The lamp socket
is mounted on a movable bracket behind the gusset.
The bracket must be swung upward in order to remove
and replace the lamp. Both positions of the bracket
are shown in Fig. 5-17. Loosen the left-hand nut and
swing the bracket upward as shown in Part B of the
figure. Replace the bulb, return the bracket to its
original position as shown in Part A and tighten the
nut. f Return the chassis to the case and tighten the
panel thumbscrews.
f. There is only one dial lamp in the Bearing Indi-
cator. To replace it, loosen the front panel thumb-
screws and pull the chassis forward until the locks are
engaged. The lamp is located on the frame between
the two synchro units. It is mounted on a bracket as
shown in Fig. 5-18. Loosen the thumbscrews, grasp
Figure 5-17. Dial Lamp Behind MILES Window
on Range Scope
5-8
Figure 5-18. Dial Lamp in Bearing Indicator
the top of the bracket and pull it upward as far as it
will go. Hold it in this position and remove the bulb
with the other hand, then return the bracket to its
original position and tighten the thumbscrew. See
Fig. 5-18. Release the chassis locks, return the chassis
to the case and tighten the thumbscrews on the front
panel.
g. The Indicator lamps as well as the fuse alarm
lamps on all of the units are easily replaced. To re-
place any of these lamps, unscrew the small glass bezel
over the lamp and remove the lamp from its socket.
The replacement may then be installed and the bezel
replaced.
6. TUBE REPLACEMENT (Emergency only).
a. GENERAL.
(1) Tubes should normally be replaced only by ex-
perienced technical personnel. However, emergencies
may arise during battle when a technician is not avail-
able. To cover such emergencies, the instructions and
precautions that follow are given for the guidance of
non-technical personnel.
WARNING
DANGEROUS VOLTAGES ARE PRESENT
IN THE TRANSCEIVER, MODULATOR
ORIGINAL
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OPERATOR'S MAINTENANCE NAVSHIPS 900,946 SECTION C
Par. 6b
AND INDICATOR CONSOLE. DO NOT
TOUCH ANY TUBES UNLESS ABSO-
LUTELY NECESSARY. NO ATTEMPT
SHOULD BE MADE TO REPLACE TUBES
UNTIL THE A-C POWER IS DISCON-
NECTED AND THE CAPACITORS DIS-
CHARGED BY GROUNDING THEIR
TERMINALS TO THE CHASSIS FOR AT
LEAST FIVE SECONDS. DO NOT MAKE
CONTACT WITH METAL CONNECTORS
ON HIGH VOLTAGE LEADS. FAILURE
TO COMPLY WITH THIS WARNING
MAY RESULT IN DEATH. .
b. LOCATING DEFECTIVE TUBES.
(1) The ability to replace defective tubes is
limited by the lack of test equipment. Generally
speaking, the operator can only replace tubes with
open heaters since this is about the only defect that
can be determined by visual inspection. If the interior
of a tube is dark, its heater may be open and it should
be replaced. When a chassis is pulled out for inspec-
tion the interlocks must be closed or the a-c power
circuit will be open and none of the tubes will be
illuminated. Always replace a tube with another that
has the same type number. Do not replace any tube
that has a cap on top of the glass envelope until the
cap has been grounded for approximately one minute.
These tubes are high voltage tubes and are connected
to capacitors that are normally charged to several
.thousand volts. Use a discharge stick to discharge the
capacitors. If the proper equipment is not available
to discharge the capacitors, leave the tube alone and
wait until maintenance personnel, with the proper
equipment, can take care of the trouble. The tubes are
secured in their sockets with tube clamps around the
base of the tube. Pull the loop on the clamp to the
left to release it. Then pull the tube straight out of
the socket. When replacing tubes be sure that the
key on the guide pin on the base is aligned with the
key way in the guide pin hole in the center of the
socket. Be sure to push the tube all of the way down
into the socket and then tighten the clamp around the
base of the tube. Tubes with red circles around the
socket may be removed and used elsewhere without
completely disrupting the functions of the equipment.
Defective tubes may also be detected by observing the
indications on meters, scopes and the failure to respond
to switches. It is not anticipated that the operator
will have much occasion to resort to locating defective
tubes by this method. The locations of the tubes in
the various units are shown in Figs. 5-19 to 5-30 inclu-
sive. Spare tubes are located in the General Control
Unit. See Fig. 5-28. Do not attempt to replace the
cathode ray tubes. This should only be done by
maintenance personnel.
NOTE
ALL TUBES OF A GIVEN TYPE SUP-
PLIED WITH THE EQUIPMENT SHALL
BE CONSUMED PRIOR TO EMPLOY-
MENT OF TUBES FROM GENERAL
STOCK.
Figure 5-19. Transceiver, Tube Locations
ORIGINAL
V-/07
GL8020
V-/08
GL8020
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5 SECTION NAVSHIPS 900,946 OPERATOR'S MAINTENANCE
V-304
SBP/
V-305
5L14-6
V-303
65N7-6T
V-306
RKR -72
V-30/
6SN7-GT
V-302
6SN7-GT
V-307
6467
Figure 5-20. Monitor Scope, Tube Locations
V-208 V-207 V-20I V-202
6H6 6AC7 6L446 GL-446 ,
5-10
V-2I2 V-206 V-205 V-202 V-204
5U4G
GAG 7
6AC7
Figure 5-21. Monitor Receiver, Tube Locations
955
6AG7
ORIGINAL
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OPERATOR'S MAINTENANCE NAVSHIPS 900,946 'SECTION .5
Figure 5-22. Modulator, Tube Locations
V-703 V-704 V-709 V-708 V-710 V-711 V-716
64C7 6AC7 6AC7 64C7 6SN7GT 6sraer 6467
10
?
ORIGINAL
V-70I
V-702
V-705 V-706
V-707 V-712 V-7I3 V-7I5
V-7I4
6AC7 6A07 6AC7 6AG7 6H6 6467 6A67 51/46 6467
Figure 5-23. Console Receiver, Tube Locations
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5 SECTION
NAVSHIPS 900,946
OPERATOR'S MAINTENANCE
807
V-5/2
7BP7
V-505
6SN7-GT
V-504
807
V-503
6SN7-GT
V-502
6SN7-GT
V-50I
807
V-5/6
6SN7-GT
V-5/0
6SN7- GT
V-507
6$N7-GT
V-509
5U4G
V-5/1
RKR-72
V-506
6SN7-GT
V-517
VR-150-30
5-12
Figure 5-24. PPI Indicator, Tube Locations
V-6I1 V-6I3 V-605
6SN7GT 6407 5CP7
V-610 V-6I2 V-608 OR
6SN7GT 6SN7GT 64G7 5CPI
V- 609
5U4G
V-60I
6AG7
V-600 V-607
6SN7GT 6SN7GT
V-606
6SN7GT
V-6I4
RKR-72
Figure 5-25. Range Scope, Tubes on Top of Chassis
ORIGINAL
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OPERATOR'S MAINTENANCE NAVSHIPS 900,946 SECTION 5
S-600
L-610
R-634
L-604
L-605
C-620
L-603
C-609
0-613
L-602
0-643
L-601
C-642
C-619
L-608
ORIGINAL
R-632
T-602
V-602
6SA7
C-614
TP-610
TP-627
C-6I5
V-603
6SN7GT
TP-61I
0-6/6
V-604
6AG7
TP-6I2
Figure 5-26. Range Scope, Tubes on Bottom of Chassis
L-609
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5 SECTION
NAVSHIPS 900,946
? V-902 V-903 V-904 V-905 V-906
S-701 6AG7 6SN7GT 65IV76T 6SN7GT 5U4G
V- 901 R-934 C-909 L-902 C-908 L-901
6AG7
OPERATOR'S MAINTENANCE
C-914 T-90I
ant r":0.? M A A A' 0 fl ? 1; fi
117.1411111111111111111111111111111 vi
iIi Rept'
11.1jaIi 'I
--II
ir
R-910 R-942 R-913 R-B4l R-928
R-909 R-934 R-903 R-940 R-931
Figure 5-27. IFF Coordinator, Tube Locations
M-401 C-402 S-406 13-401
C-9I5
5-14
5-403 S-404 C-401
SPARE TUBES
Figure 5-28. General Control Unit, Location of Spare Tubes
ORIGINAL
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OPERATOR'S MAINTENANCE NAVSHIPS 900,946 SECTION 5
Figure 5-29. Servo Amplifier, Tube Locations
Figure 5-30. Synchro Amplifier, Tube Locations -
ORIGINAL
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5-15
I0 01
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A SECTION NAVSHIPS 900,946 PREVENTIVE MAINTENANCE
IP Par. la
SECTION 6
PREVENTIVE MAINTENANCE
I. GENERAL.
a. The object of preventive maintenance is to antici-
pate as far as possible, the occurrence of troubles and
to take steps designed to prevent their occurrence.
Preventive maintenance consists of inspecting the
equipment, at periodic intervals, for loose or broken
parts, loose connections and improper adjustment. It
also includes cleaning and lubrication. This section
contains suggested maintenance schedules for the .use
of personnel responsible for this phase of maintenance.
Instructions describing the procedures to be followed
are given in this section and in Section 5.
2. MAINTENANCE TEST SCHEDULE.
a. In addition to the duties outlined in the follow-
ing test schedules, the operators should check the read-
ings of the equipment every hour and should also
check the operation of any component whose perform-
ance is not readily apparent during the course of nor-
mal operation. Some of the items in the maintenance
schedules are also given in Section 5 and should be
performed by the operators. Other items, particularly
the items requiring partial disassembly of the equip-
ment, should be performed by maintenance personnel.
Alignment and adjustments requiring test equipment
or special tools should also be performed by mainte-
nance personnel. (See Tables 6-1 to 6-5 inclusive at
the end of this Section.)
NOTE
THE ATTENTION OF MAINTENANCE
PERSONNEL IS INVITED TO THE RE-
QUIREMENTS OF CHAPTER 67 (OR 68)
OF THE "BUREAU OF SHIPS MANUAL",
OF THE LATEST ISSUE.
3. MECHANICAL MAINTENANCE.
a. One of the most important items in the care of
electrical equipment is cleanliness. If the interiors of
the components are kept clean and free from dust, dirt,
and other deposits, occurrence of arc-overs is reduced,
corrosion is minimized. Dust and dirt particles ionize
easily and therefore contribute to the likelihood of
arc-overs. Dirt deposits are spongy and have a ten-
dency to absorb moisture from the atmosphere and
thus contribute to corrosion. Therefore the trouble-
free life of the equipment will be greatly increased if
the interiors are cleaned periodically. The components
exposed to salt air should be cleaned to remove deposits
of salt. The interiors of the units should be cleaned
6-0
with a cloth free from lint. If a cloth is used that
leaves lint on high voltage terminals it would be better
not to clean them at all.
b. All mounting bolts and studs should be inspected
to see that they are tight. It is also well to occasion-
ally inspect the assembly bolts and screws on the vari-
ous components -to see that none of them are loose,
especially if any of the units have been disassembled
for any reason. Since the antennas and the antenna
pedestal are subject to the most wear, particular atten-
tion should be paid them. The brackets supporting
the waveguide and the IFF coaxial transmission line
should also be inspected to see if any of them are loose.
c. The exteriors of the various components should
be inspected for broken meter glasses, sticking meter
needles, loose, broken or bent controls, and loose or
missing jewels over the indicator lamps. The air filters
Oh the Transceiver and Rotation Control Unit should
be cleaned whenever they begin to restrict the passage
of air. The filter unit should be removed, and washed
in gasoline, and then allowed to dry thoroughly. If
the filter is very badly clogged, it may be necessary to
use an air hose to remove the dirt in the interior of the
filter. After the filter has been dried, it should be
impregnated with either of the following lubricants:
Spec. Navy Symbol Federal Stock Catalog No.
NBS431 NS2190T 14-0-2879-25 or 14-0-2879
14-0-13 NS9250 14-0-2187 or 14-0-2195
Ic
a
?
wzo,
ref"
kttt/
ett, ?
0
A.%71
1.
.? ,
0
Figure 6-1. Air Filter in Transceiver
ORMINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
PREVENTIVE MAINTENANCE NAVSHIPS 900,946 SECTION A
Par. 3c IF
The filter on the Rotation Control Unit is removed by
lifting it up and out of the brackets that hold it in
place. The filter in the Transceiver is removed by
removing the panel on the lower right-hand side. The
screws holding the retaining plates can be removed to
permit the filter to be lifted out. See Fig. 6-1.
d. While the filters are being cleaned check the fans
on the blower motors. Check each fan assembly to see
that it is tightly mounted on the drive shaft of the
blower motor. If it is not, tighten the set screws. The
fan motor mountings should be checked to see that
they have not loosened and shifted position. If the
mounting is loose, be sure to align the motor so that
the fan is centered in the shroud before tightening the
mounting bolts.
e. The Antenna Drive Motor and the gear train in
the Pedestal are subject to more mechanical wear and
usage than any other parts of the equipment. These
parts should be inspected regularly. The motor should
be inspected for worn bearings and the gear train
should be inspected for excessive backlash. If evidence
of either trouble is present, it should be corrected as
directed in Section 7. Regular lubrication as directed
in Paragraph 6f of this section will greatly prolong
the life of the gear and gear train.
f. The control knobs are secured to the control
shafts by means of Allen head set-screws. There are
two screws for each knob. An Allen set-screw wrench
is supplied with the equipment to use when tightening
the control knobs or whenever they must be removed.
Allen wrenches are also provided to tighten the set
screws in the fans on the blower motors. The Allen
wrenches are carried in Fahnestock clips mounted on
the chassis frames at easily accessible points. After all
other maintenance has been performed, any rust should
be cleaned away with a fine grade of sandpaper and
paint applied to the rusty and scratched places.
4. ELECTRICAL MAINTENANCE.
a. Electrical preventive maintenance consists of visu-
ally inspecting the electrical parts and circuits of the
equipment for evidence of trouble, both of a mechani-
cal nature and an electrical nature. Quite frequently
trouble discovered during preventive maintenance will
require the application of the instructions given in
Section 7 Corrective Maintenance. All cabling and
wiring should be inspected for defects of all kinds.
Check each plug and terminal board for poor connec-
tions. The terminal boards should be clean and the
connections should be free from corrosion. Check the
condition of the wires where they enter the solder lugs.
There should be no bare wire exposed and the insula-
tion should not be frayed. See that all connections are
tight. The plugs on the plug-in type units should be
securely mounted on the chassis and the pins should
be straight so that they align perfectly with the female
contacts. If the female contact seems to be too loose
to make good contact, squeeze it together. If the
contacts are dirty or corroded, burnish them with
ORIGINAL
crocus cloth or a fine grade of sandpaper. To burnish
the inside of sleeve contacts, roll up a small strip of
crocus cloth or sandpaper, insert it in the contact, and
rotate it until the contact is burnished. Use this same
treatment on coaxial connectors except that only crocus
cloth can be used for burnishing since these connectors
are silver plated and sandpaper will destroy the plating.
b. The cables should be inspected for damaged insu-
lation and broken conductors at points where they pass
around the corners of equipment, come out of holes
in chassis, and run from bulkhead straps to the units.
Support all cables that are limp and subject to acci-
dental strains which might break them. If any of the
cables have a tendency to kink, slip a short length of
flexible plastic tubing over them at the point where
the kink occurs. Check all soldered connections for
cold soldered joints and resolder any defective joints
found. Check the stuffing tubes to see that they seal
tightly around the cables and are water tight. Where
coaxial cables pass through stuffing tubes be sure that
the stuffing tubes are tight enough to seal but not
tight enough to force the cable dielectric to flow away
from that point. If the cable shows any tendency to
bulge at the point where it enters a stuffing tube, it is
recommended that the cable be replaced or spliced
since a discontinuity with its attendant electrical losses
has developed at that point. Pulse cables that have
been in use for long periods should be checked for
leakage with a d-c bridge or a good megger. A high
potential test may also be used to determine the condi-
tion of a cable carrying pulses of high voltage.
c. The various chassis should be carefully inspected
at regular intervals. The tubes should be removed
and tested in a good tube checker, preferably a mutual
conductance type. This should be done once each
quarter. Care should be exercised to prevent breakage
when removing and replacing tubes. Be careful to
replace the tubes in their original sockets after testing.
The tube clamps should be tightened when the tubes
are replaced. The tubes should be pushed all the way
down into their sockets when they are replaced. Any
tubes that do not test satisfactorily should be replaced.
NOTE
ALL TUBES OF A GIVEN TYPE SUP-
PLIED WITH THE EQUIPMENT SHALL
BE CONSUMED PRIOR TO EMPLOY-
MENT OF TUBES FROM GENERAL
STOCK.
d. Heater resistors should be checked with an ohm-
meter once every quarter. It will be necessary to dis-
connect the heater resistor from its circuit to get an
effective test. The parts in the chassis should be in-
spected for dust and corrosion. The circuit resistors
should be inspected to see if any of them are charred
or discolored from overheating. If any are found they
should be replaced. Capacitors should be inspected
for oil leakage and cracked insulators. The insulation
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6-1
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
SECTION
Par. 4d
NAVSHIPS 900,946
of transformers, chokes and motors should be inspected
for signs of overheating wherever possible. Overheat-
ing of these parts is usually caused by a circuit condi-
tion which overloads them beyond their current carry-
ing capacity or by a breakdown of the insulation
between turns. The first cause quite often produces
the second. When an inductor has once been over-
heated, the burned insulation may be detected by its
characteristic odor and in some cases, the impregnating
wax melts and runs out of the can. Corrective mainte-
nance procedures should be employed to determine the
cause of overheating before the defective parts are
replaced. The circuits are fused to protect the trans-
formers and very little difficulty of this kind should be
experienced.
e. The relays should be inspected periodically to see
that they are clean, have not been subjected to over-
heating, and that their mechanical operation is satis-
factory. The armatures should move freely, and the
contacts should close together firmly. Examine the
contacts for evidence of burning, pitting, or excessive
wear. If they require cleaning and burnishing, use a
standard relay service kit of tools. Do not use sand-
e paper on silverplated contacts. Use only crocus cloth.
Replace any relay whose contacts are so badly burned
as to require reshaping with a file. The recondition-
ing and restoration of contacts is not a preventive
maintenance duty. It is a repair job and it is much
more satisfactory to return the relay for new contacts
and adjustment. After the relays have been cleaned,
operate the switches that energize them and watch
them operate. They should operate with a good posi-
tive action without arcing and should remain closed
without chattering. If the relays arc or chatter, they
should be adjusted or replaced. The tension adjust-
ment on the relays is readily accessible. Most of them
6-2
Figure 6-2. Slewing Motor Brushes in
Bearing Indicator
PREVENTIVE MAINTENANCE
have no adjustment and should be replaced when
trouble develops.
5. CARE OF BRUSHES.
a. The care of the brushes in the various components
is usually a preventive maintenance item. The Bear-
ing Indicator must be removed from its compartment
to inspect the slewing motor brushes. The slewing
motor is located near the rear of the chassis behind the
indicator dials and the synchro units. The brushes are
removed from the brush holders by unscrewing the
knurled caps with screwdriver slots. See Fig. 6-2. The
brush holders are located on the rear bell housing of
the motor. The brushes should be replaced whenever
inspection shows that only one-quarter of an inch of
active brush material remains. The commutator should
be inspected to see if it requires dressing and under-
cutting. If it does, the motor should be replaced and
the old motor sent to a repair depot equipped to make
such repairs.
b. The brushes on the exciter and d-c generator of
the Servo Generator should be serviced in the same
way described for the slewing motor. The exciter
brushes are held in place by slotted caps on the brush
holders similar to the brush holders on the slewing
motor. See Fig. 6-3. Retaining straps are placed over
the caps to keep vibration from working them loose.
These straps are held in place with two screws. To
remove the brushes, remove one of the screws holding
the strap and loosen the other. Swing the strap away
from over the brush cap and replace the strap screw
in the hole in the housing so that it will not be mis-
placed. Use a screwdriver to remove the brush cap
and then lift out the brush. The brushes on the d-c
generator are accessible when the brush cover is re-
moved from the housing. This cover is located adja-
cent to the grease cup. To remove the cover, take out
the screws and rotate the cover until the open ends are
Figure 6-3. Replacing Brushes in Servo Generator
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
PREVENTIVE MAINTENANCE AVSHIPS 900,946 SECTION A
Par. 5b
REMOVE SPRING FROM
SLOT TO REMOVE BRUSH.
MOVE SPRING UP INTO
FIRST SLOT AS BRUSH
WEARS.
Figure 6-4. Replacing Brushes in Motor-Generator
behind the junction box. Then spring the cover so
that it can be slipped off the frame.
c. The brushes in the motor generator are shown in
Fig. 6-4. The exciter brushes are accessible when the
cover on the exciter is removed. This cover consists of
three sections hinged together and is held in place by
two rings over retaining posts. When these brushes
are replaced they should be seated with a seating stone.
The brushes should be placed in the brush holders and
the stone held lightly against the commutator while it
is running. The seating stone should be applied two
or three times for a few seconds each time. The brushes
in the d-c drive motor are accessible when the hinged
covers are opened. These covers are on the coupler
side of the bell housing as shown in Fig. 6-4. These
brushes should be replaced and seated as previously
described. When servicing the brushes note the ap-
pearance of the commutators. If the bars are worn
down to the insulating spacers in the motor or exciter,
the unit should be replaced and returned to the shop
for a complete over-hauling. The exciter and gen-
erator must be removed together as one unit. The d-c
drive motor can be removed as a separate unit. The
brushes should be replaced whenever they have worn
sufficiently to materially reduce the spring pressure
and cause the brushes to ride lightly on the commu-
tator.
d. The brushes in the antenna drive motor should
be inspected quarterly and replaced whenever the
ORIGINAL
amount of wear reduces the spring pressure below the
point where positive contact can be continuously main-
tained. The motor brushes are shown in Fig. 6-5.
They can be removed by unscrewing the screw caps
on the brush holders. The brush holders are located
on the upper and lower sides of the rear bell housing.
If the commutator shows signs of wear, it should be
replaced.
e. The replacement of the slip ring brushes in the
antenna pedestal is shown in Fig. 6-6. To inspect the
brushes, loosen the eight captive screws that hold the
brush cover to the housing and pull the brush assembly
NOTE: ON GENERAL ELECTRIC
MOTORS, BRUSHES ARE
LOCATED AT TOP AND
BOTTOM.
Figure 6-5. Replacing Brushes in
Antenna Drive Motor
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6-3
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
A SECTION NAVSHIPS 900,946 PREVENTIVE MAINTENANCE
Par. 5e
Figure 6-6. Brushes in Antenna Pedestal
straight out. The amount of wear on the brushes can
be determined by comparing the brushes in use with
the spare brushes on the brush block.
WARNING
DO NOT PERFORM ANY MAINTE-
NANCE ON THE ANTENNA PEDESTAL
UNLESS THE ROTATION CONTROL
UNIT AND SERVO GENERATOR ARE
OFF. REMOVE THE MOTOR DISCON-
NECT PLUG IN THE BASE OF THE PED-
ESTAL BEFORE PERFORMING ANY
MAINTENANCE.
6-4
To remove a brush assembly, remove the screw at the
end of the brush block that serves as a connection for
the motor lead wire and the braided brush lead. Re-
move the hexagonal nut and washers from the end of
the brush holder that projects out from behind the
brush block. Press on the threaded end of the brush
holder and push the defective brush assembly out of
the brush block. To replace the brush assembly, push
its threaded end through the hole in the brush block.
Be sure the square shank is registered in the slot in
the brush holder. Place the braided brush lead and
the proper motor lead on the fillister head screw and
thread the screw into the hole in the brush holder.
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
PREVENTIVE MAINTENANCE NAVSHIPS 900,946 SECTION A
Par. 5e w
Figure 6-7. Brushes and Slip Rings on FPI Assembly
Place a flat washer and a lock washer on the threaded
end of the brush holder. Then screw the hexagonal
nut down tight on the threaded end of the brush
holder. Replace the brush holder in the main housing
and close the cover door, making certain that all gas-
kets are smooth and properly in place before bolting
the cover in position. The removal and replacement
of the entire brush block assembly is described in
Section 7.
f. Particular attention should be paid to the neck
of the PPI tube where it passes through the yoke coil.
Deposits may form under the coil that makes it hard
to turn or else causes it to turn with a jerky movement.
This can often be detected by manually turning the
shaft of the drive motor. If trouble is detected, the
PPI tube should be removed and the deposit cleaned
away. This procedure is primarily a corrective main-
tenance procedure because of the extreme delicacy re-
quired to remove the PPI tube. Refer to the procedure
given in Section 7. The slip rings on the PPI yoke
coil should be cleaned every three months. The brushes
should also be removed and inspected for excessive
wear, and to see that they make good contact with the
slip rings. To clean the slip rings, remove the four
screws that hold the access cover in place as shown in
Fig. 6-7. Remove the brushes at the same time. If
the old brushes are replaced, they should be replaced
in the same holders from which they were removed
and they should not be turned around in the holder.
When the access cover is removed, the slip rings may
ORIGINAL
be easily reached for cleaning. Use a flat piece of
wood slightly wider than the slip ring, with a piece of
crocus cloth wrapped lengthwise over one end. If a
suitable piece of wood is not available, wrap the crocus
cloths strip back over the forefinger. Insert the piece
of wood or the forefinger into the opening and gently
press it against one of the slip rings. See Fig. 6-7.
Rotate the shaft of the drive motor with the left hand
until the slip ring is clean. Repeat the operation for
the other slip ring. After the rings have been cleaned,
wipe the rings and yoke coil assembly with a dry clean
cloth that is free of lint. Be careful not to allow any
dust to get into the yoke coil bearings or it will be
necessary to disassemble them for cleaning also. After
cleaning, replace the access cover.
g. The location of the brushes in the Synchro
Amplifier is shown in Fig. 6-8. There are six commu-
tator brushes on the commutator arms and six collec-
tor brushes on the slip rings. The tension on the
commutator brushes is manually adjustable. As shown
in Fig. 6-8, a screw may be turned to increase or
decrease the compression of the spring that forces the
brush against the commutator face on the transformer.
The tension should be adjusted so that positive contact
is maintained without binding. When the brush has
worn to the point where the spring is almost in contact
with the shoulder inside the holder, replace it with a
new brush. To replace the brush unscrew the hex-
agonal nut and sleeve assembly that holds the adjusting
screw. See Fig. 6-8. Remove the spring and work
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6-5
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
6SECTION NAVSHIPS 900,946 PREVENTIVE MAINTENANCE
Par. 5g
Figure 6-8. Brush Assemblies in Synchro Amplifier
the brush out through the rear of the spider arm.
Insert the new brush, then the spring and screw the
hexagonal nut and sleeve back into position. Adjust
the screw to the proper tension. To remove the slip
ring or collector brushes, unscrew the fillister head
screw that holds the brush braid as shown in Fig. 6-8.
Raise the brush arm and slip the brush out. Note that
the brush may be removed for inspection by lifting
the brush arm, dropping the brush down and sliding
the braid out through the slot in the end of the brush
holder. The brush should be replaced whenever it
wears to the point ,where the holder is about one-
eighth of an inch away from the slip ring. If the slip
rings become dirty, clean them with a cloth dipped in
an approved solvent. Then polish the rings with a
dry cloth. The brush holder assembly may be removed
by first removing the brush and then removing the
hairpin clip that holds the brush holder on the shaft.
The brush holder and spring assembly may be slipped
off of the shaft when the clip has been removed. When
6-6
replacing the holder be sure the spring is positioned
to enter the slot so that pressure will be exerted against
the brush. Do not use brush seating compound when
replacing the brushes in the synchro amplifier.
h. The brushes in the switch drive motor in the
Keyer Unit are shown on the lubrication diagram in
Fig. 6-17. The brushes are accessible from the bottom
of the unit. They are removed by unscrewing the
brush caps shown and pulling out the spring and
brush.
6. LUBRICATION.
a. GENERAL.
( 1 ) Figs. 6-9 to 6-17 inclusive show the points in
each unit that require lubrication, the frequency of
lubrication, the type of lubricant to be used, and brief
instructions. Supplementary instructions are also given
in the following paragraphs. These instructions refer
to parts of the equipment that require disassembly in
order to lubricate the parts. , Chassis runners and rails
should be lubricated quarterly with petrolatum
ORIGINAL
Declassified and Approved For Release 2013/11/21: CIA-RDP67B00341R000800090001-3
Lubrication of Geared Cursor
LUBRICATION
GEARED CURSOR
(Th
Point
Part
Location
Lubricant
Instructions
Quarterly
0 oTi trl c-) 0:1
Control shaft
Front of Cursor
Spec. N.B.S. 431, Navy Symbol NS 2075
Remove control knob. Apply one drop.
Fed. Std. Stock, Cat. No. 14-0-2586
Bevel gears
Gear housing
Spec. N.B.S. 431, Navy Symbol NS 2075
Fed. Std. Stock, Cat. No. 14-0-2586
Swing cursor open. Remove plate, apply
two drops to each gear.
Gear and pinion
Gear housing
Spec. N.B.S. 431, Navy Symbol NS 2075
Fed. Std. Stock, Cat. No. 14-0-2586
Swing cursor open. Remove plate, apply
two drops to each gear.
Grooved rollers
Cursor housing
Spec. N.B.S. 431, Navy Symbol NS 2075
Fed. Std. Stock, Cat. No. 14-0-2586
Swing cursor open. Apply one drop to
each roller.
Ring Gear and
Cursor housing
Spec. N.B.S. 431, Navy Symbol NS 2075
With cursor open. Apply four drops to
Pinion
Fed. Std. Stock, Cat. No. 14-0-2586
ring gear.
Bearings
Plate on gear
Spec. N.B.S. 431, Navy Symbol NS 2075
With cursor open. Apply one drop to each
housing
Fed. Std. Stock, Cat. No. 14-0-2586
bearing.
Shaft
Top of cursor
Spec. N.B.S. 431, Navy Symbol NS 2075
Apply one drop around collar.
Fed. Std. Stock, Cat. No. 14-0-2586
9176'006 SdIHSAVN
CP%
LUBRICATION
PPI ASSEMBLY
Point
Part
Location
Lubricant
Instructions
Semi-Annually
t?TI C"") td
Yoke Coil
On front of yoke coil
Spec. N.B.S. 431, Navy Symbol NS 2110
Clean with solvent. Dry, and apply one 16" drop
bearing
behind bell of PPI Tube
Fed. Std. Stock Cat. No. 14-0-2595
of lubricant.
(Alternate?Gulf Petrolatum B)
Yoke Coil
On rear of yoke coil be-
Spec. N.B.S. 431, Navy Symbol NS 2110
Clean with solvent. Dry, and apply one " drop
bearing
hind bell of PPI Tube
Fed. Std. Stock Cat. No. 14-0-2595
of lubricant.
(Alternate?Gulf Petrolatum B)
Yoke Coil
In front of focus coil
Spec. N.B.S. 431, Navy Symbol NS 2110
Remove focus coil. See Section 7, Par. 27 b (3).
drive gears
Fed. Std. Stock Cat. No. 14-0-2595;
Apply one " drop of lubricant where gears mesh.
(Alternate?Gulf Petrolatum B)
Yoke Coil
In front of focus coil
Spec. N.B.S. 431, Navy Symbol NS 2110
Remove focus coil. See Section 7, Par. 27 b (3).
Servo gears
Fed. Std. Stock Cat. No. 14-0-2595
Apply onelW drop of lubricant where gears mesh.
(Alternate?Gulf Petrolatum B)
Drive gears
Drive gear housing
Spec. N.B.S. 431, Navy Symbol NS 2110
Remove drive motor. See Section 7, Par. 27 b (6).
Fed. Std. Stock Cat. No. 14-0-2595
(Alternate?Gulf Petrolatum B)
Apply one " drop of lubricant to drive motor
pinion.
Annually
"
Ball Bearing
Servo drive shaft
Spec. N.B.S. 431, Navy Symbol NS 2110
Disassemble mount. See Section 7, Par. 27 b (7).
Fed. Std. Stock Cat. No. 14-1-2595
Clean with solvent. Apply 16" drop of oil.
(Alternate?Gulf Petroleum B)
Ball Bearing
Servo drive shaft
Spec. N.B.S. 431, Navy Symbol NS 2110
Disassemble mount. See Section 7, Par. 27 b (7).
Fed. Std. Stock Cat. No. 14-0-2595
(Alternate?Gulf Petrolatum B)
Clean with solvent. Apply /116 " drop of oil.
Ball Bearing
Jack shaft
Spec. N.B.S. 431, Navy Symbol NS 2110
Disassemble mount. See Section 7, Par. 27 b (7).
Fed. Std. Stock Cat. No. 14-0-2595
Clean with solvent. Apply " drop of oil.
(Alternate?Gulf Petrolatum B)
Ball Bearing
Jack shaft
Spec. N.B.S. 431, Navy Symbol NS 2100
Disassemble mount. See Section 7, Par. 27 b (7).
Fed. Std. Stock Cat. No. 14-0-2595
Clean with solvent. Apply /116" drop of oil.
(Alternate?Gulf Petrolatum B)
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
BEARING INDICATOR
Point
Part
Location
Lubricant
Instructions
>,
a
B
C
Gear Box
Gear Box
On Bedplate near center of
Bearing Indicator
Spec. N.B.S. 431, Navy Symbol NS 2110
Fed. Std. Stock Cat. No. 14-0-2595
Fed. Spec. VV-G-671, Fed. Std. Stock Cat.
No. 14-G-950 or Fed. Spec. SS-G-659,
Fed. Std. Stock Cat. No. 14-G-570 when
needed
Three drops from flexible spout can in
each hole.
Remove cover, dust graphite over teeth
while turning several rotations by
hand.
Monthly
Quarterly
Semi-Annually
A
F
Jacket-shaft spur gear
and drive gear
Drain plug
On jack-shaft in bracket at
front of Bearing Indicator.
Drive gear on control shaft
Gear box
Ordnance Spec. 0S1350 (Fed. Std. Stock
Cat. No. 14-G-715)
Wipe lubricant on with a saturated
cloth or brush. Do not leave any
surplus on gears.
Remove plug and drain out excess
lubricant. Do not flush gear box.
Annually
E
G
H
Motor Bearing
Motor Bearing
Bearing
Bearing
Slewing Motor
Slewing Motor
Gear box output shaft
Gear box output shaft
Navy Spec. 14L3 Grade C (Fed. Std.
Stock Cat. No. 14-L-85-5)
Navy Spec. 14L3 Grade C (Fed. Std.
Stock Cat. No. 14-L-85-5)
No lubrication necessary
No lubrication necessary -
Remove set screw. Use grease gun,
spatula or other means to force lub-
ricant into hole until full.
Remove set screw. Use grease gun,
spatula or other means to force lub-
ricant into hole until full.
91,6'006 SdIHSAVN
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
MOTOR GENERATOR
SERVO GENERATOR
LUBRICATION
SERVO AND MOTOR GENERATORS
Point
Part
Location
Lubricant
Instructions ?
SEMI-ANNUALLY
A
B
Ball Bearings
Ball Bearings
Servo Generator
Motor Generator
Navy Spec. 14-L-3 Grade A (Fed. Std.
Stock Cat. No. 14-L-131 or 14-L-132)
Navy Spec. 14-L-3 Grade A (Fed. Std.
Stock Cat. No. 14-L-131 or 14-L-132)
Fill grease cups with lubricant and screw down to
force lubricant into bearing.
Remove " drain plug and, after making sure drain
line is clear, with unit running force in clean grease
by screwing down cap of grease cup until grease
appears at drain plug.
0
9P6'006 SdIFISAVN
33NVN31NIVW 3AL1N3A311d
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Lubrication of Antenna Pedestal
LUBRICATION
ANTENNA PEDESTAL
o
x B
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SEMI-ANNUALLY MONTHLY
Point
Part
Location
Lubricant
Instructions
A
Synchro Shafts
Synchro Housing of
Ordnance Spec. OS-1113 (Fed Std.
Remove cap screws from synchrotie inspection door.
Antenna Pedestal
Stock Cat. No. 14-0-884-10)
Lower the cover, exposing three oil cups. Fill each
cup.
B
Drive Pinion
Rotaing Housing on
Spec. SS-G-659 (Fed Std. Stock Cat.
Open brush cover door. Dust graphite lubricant on
and Ring Gear
Antenna Pedestal
No. 14-G-950)
on gear. Wipe away any excess.
C
Gear Case
Rotating Housing on
Antenna Pedestal
,
Navy Spec. 14-0-13, Navy Symbol,
NS-9110 (Fed. Std. Stock Cat. No.
14-0-2162) or Spec. N.B.S. 431 Navy
Symbol NS-2135 (Fed. St. Stock Cat.
Remove oil level plug and oil filter plug. Fill until
even with bottom of oil level hole. Do not mix one
type of lubricant with the other. Drain old lubricant
if type is changed.
No. 14-0-2608)
-
D
Motor Bearings
Rotaing Housing
Navy Spec. 14-0-13, Navy Symbol NS-
9110 (Fed. Std. Stock Cat. No. 14-0-
Remove K" pipe plugs. Insert spout of oil can and
add oil. Do not overfill.
2162)
906'006 SdIHSAVN
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
OFF
A
S109 0 3
S110
S111 S119
GREASE PLUG
DANGER
HIGH VOLTAGE
LUBRICATION
TRANSCEIVER
Point
Part
Location
Lubricant
Instructions
SEMI-ANNUALLY
A
B
Sleeve Bearings
Worm gears
Gear Box on Variac
drive motor
Gear Box on Variac
drive motor
Navy Spec. 14-0-13, Navy Symbol
NS-9500 (Fed. Std. Stock Cat. No.
14-0-2215)
BuShip Spec. N.B.S. 431, Navy Symbol
NS-3100 (Fed. Std. Stock Cat. No.
14-0-2685)
Put five drops of oil in each oil cup.
Remove grease " plug and fill gear box with lub-
ricant.
ANNUALLY
C
_
Bearings
Blower Motor at rear
of cabinet
Navy Spec. 14-L-3 Grade B (Fed. Std.
Stock Cat. No. 14-L-90-15)
Disconnect and remove motor. Disassemble bell
housings from motor frame and drive out bearings.
Clean with solvent, Fed. Spec. VV-K-211, Fed. Std.
Stock Cat. No. 14-K-225 or 14-K-235. Dry thorough-
ly and repack with lubricant.
In
91P6'006 SdIHSAVN
3DNVN31NIVW 3ALLN3A311d
C-)
Lubrication of Rectifier Power Unit
LUBRICATION
RECTIFIER POWER -UNIT
Point
Part
Location
Lubricant
Instructions
1 ANNUALLY
A
Bearings
Blower Motor
Navy Spec. 14-L-3 Grade B (Fed. Std.
Stock Cat. No. 14-L-90-15
Remove motor from mounting. Disassemble bell
housings from motor frame and remove bearings.
Clean bearings with solvent, Fed. Spec. VV-K-211,
Fed. Std. Stock Cat. No. 14-K-225 or 14-K-235. Dry
thoroughly and repack with lubricant flush to bearing
race.
33NVN3INIVW 3AIIN3A311d
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
6 SECTION
NAVSHIPS 900,946 PREVENTIVE MAINTENANCE
A
A
ell
Figure 6-16. Lubrication of Synchro Amplifier
6-14
SYNCHRO AMPLIFIER
0
Part Location Lubricant Instructions
Gears and Synchro Unit Ordnance Spec. OS-1350, Fed. Std. Clean with solvent, Fed. Spec. VV-K-211, Fed. Std.
Pinions Stock Cat. No. 14-G-715 Stock Cat. No. 14-K-225 or 14-K-235. Apply very
light smear of grease, wipe off exce.
Point
ATIVIINNV-INMS
ORIGINAL
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
PREVENTIVE MAINTENANCE NAVSHIPS 900,946 SECTION 6
Figure 6-17. Lubrication of Keyer Unit
ORIGINAL
KEYER UNIT
0
co
Instructions
Apply five drops of oil to each bearing.
Lubricant
Bottom of Keyer BuShip Spec. N.B.S. 431, Navy Symbol
Unit NS-2110 (Fed. Std. Stock Cat. No.
14-0-2595)
Location
?,
,..
vs
a.,
Switch Drive
Motor
Point
-tc
IATIVfltsits1V14LRS
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6-15
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
A SECTION NAVSHIPS
I? Par. 6a(1)
Navy Spec. 14-P-1 (Federal Standard Cat. No. 14-P-98
for 1 lb. can; 14-P-100 for a 5 lb. can; 14-P-110 for a
10 lb. can.) Air filters should be washed in gasoline,
thoroughly dried, and dipped in Federal Standard Cat.
No. 14-01-2187 Navy Symbol 9250 once each three
months. Do not attempt to lubricate permanently
lubricated bearings or gears or any parts that do not
require lubrication.
b. PPI INDICATOR.
(1) Examine the cursor assembly. If it turns
hard, it needs cleaning and possibly lubrication. The
hand operated cursor is easily cleaned by removing the
rubber ring and safety glass from the back of the
cursor and by removing the cursor ring. To remove
the cursor ring, remove the screws that hold the pro-
tective casting on which the viewing shield clamps.
Then remove the filter by twisting it slightly to the
left and pulling it straight out. Next remove the
screws inside the cursor ring. This allows all moving
parts to be removed for cleaning. The parts are
assembled in reverse order. The gear driven cursor
should be lubricated as directed in the lubrication
chart in Fig. 6-9. This figure shows an exploded view
of the geared cursor but it is not necessary to dis-
assemble it 'except that the small plate with point F on
it must be removed from over the bevel gear assembly.
(2) A partial disassembly permits semi-annual
lubrication of the PPI mount, but the remainder of
the mechanical assembly must be completely disassem-
bled in order for it to be cleaned and lubricated. To
disassemble the PPI Unit for semi-annual lubrication,
refer to Par. 27b of Section 7. Lubricate the unit
as directed in Fig. 6-10. Apply lubricant to both gears
of the cluster attached to the yoke coil and to the
pinion of the drive motor. To disassemble the PPI
assembly for annual lubrication, see par. 27b of Sec-
tion 7. Lubricate as directed in Fig. 6-10.
c. BEARING INDICATOR.
(1) To lubricate the Bearing Indicator, remove
its chassis from the Indicator Console case. It will be
necessary to disconnect the cable. After the chassis is
removed, lubricate the unit using an oil can with a
curved or flexible spout so that the nozzle can be
easily applied to the holes in the top of the gear box.
Apply three drops of Navy Symbol N.S. 2110 oil, as
directed in Fig. 6-11. If a gear box becomes noisy,
remove the top of the gear box and dust the gears
lightly with powdered graphite 14-G-570, while turn-
ing the gears over by hand. The 36X synchro (B-803)
driving gears should be brushed with a light Navy
grease 14-P-98, twice each year. It is not necessary to
completely remove the chassis from the case to do this.
The gear box should be drained at least once each year.
A drain plug is provided for this purpose. Do not flush
the box or the grease in the bearings will be removed.
The slewing motor should be lubricated annually. It
is necessary to remove the chassis from the case for this
6-16
900,946 PREVENTIVE MAINTENANCE
operation. Remove the set-screws over the bearings
and force the bearing full of lubricant. The fan motors
have special type bearings which are permanently
lubricated. Therefore, they require no lubrication.
The lubrication of the synchro units requires special
treatment and is described in ,par. 6k of this section.
d. SERVO GENERATOR.
(1) The Servo Generator should be lubricated
once every three months. The lubrication chart is
shown in Fig. 6-12. Some of the early Servo Gener-
ators are equipped with sleeve bearings equipped with
oil cups. This type of bearing should be lubricated
with a lubricant such as Federal Standard Stock Cata-
log No. 14-0-2715, Navy Symbol 4065 or some other
good machine oil suitable for bearings. Most of the
Servo Generators are equipped with ball bearings and
grease cups. They are lubricated as directed in Fig. 6-12.
e. MOTOR GENERATOR.
(1) The Motor Generator is equipped with ball
bearings and with grease cups for lubrication. The
lubrication points are shown in Fig. 6-12.
f. ANTENNA PEDESTAL.
(1) The lubrication chart for the Antenna Pedes-
tal is shown in Fig. 6-13. The plain bearings, such as
the bearings between the rotating housing and the
center post, are graphite impregnated and require no
lubrication throughout the life of the equipment. The
ball bearings do not require any special attention ex-
cept during the annual overhauling process. At this
time they should be cleaned, inspected and lubricated.
The oil reservoir housing should not require refilling
unless leakage occurs. However, the oil level should
be inspected as directed in Fig. 6-13. The Antenna
Pedestal should be level when the oil level is inspected.
To check the oil level, remove the plug shown in Fig.
6-13. The oil should be even with the bottom of the
oil level plug hole. If the oil level is low, remove the
oil filler plug shown in Fig. 6-13 and add Federal
Standard Stock Catalog No. 14-0-2162, Navy symbol
N.S. 9110 lubricant or its equivalent. When the oil
runs out of the oil level hole, the proper amount of
lubricant has been added. In cases where the oil ap-
pears to be dirty, the oil should be drained. To do
this remove the drain plug and the filler plug. The
gear case can be flushed if necessary. The synchrotie
gear shafts shown in Fig. 6-13 are accessible when the
inspection door is removed. To do this, remove the
cap screws that secure the door and then raise the
covers on the three oil cups and fill the oil cups with
Federal Standard Stock Catalog No. 14-0-884-10 sym-
bol Ordnance Spec. OS-1113. The synchro units are
lubricated as described in par. 6k of this section.
g. TRANSCEIVER.
(1) The variac drive motor requires no lubrica-
tion but the sleeve bearings on the gear box should be
lubricated every six months. The drive motor is
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
PREVENTIVE MAINTENANCE NAVSHIPS 900,946 SECTION 6
Par. 6g(1)
the oil cups shown in Fig. 6-14. The gear box should
be lubricated every five or six months. To lubricate
the gears, remove the filler plug and fill the gear box,
using Federal Standard Stock Catalog No. 14-G-715
Ordnance Spec. OS-1350. The blower motor located
in the rear of the Transceiver should be lubricated
once each year. The motor is accessible when the rear
panel of the Transceiver is removed. The bearings are
lubricated through oil cups as shown in Fig. 6-14. Use
the lubricants described above.
h. RECTIFIER POWER UNIT.
(1) The only point in the Rectifier Power Unit
that normally requires lubrication is the blower motor.
The points to be lubricated are shown in Fig. 6-15.
The Motor must be removed for lubrication. The
first step is to remove the motor from its mounting.
Then the fan must be removed. An Allen wrench is
provided to loosen the set screw in the fan. The loca-
tion of this wrench is shown in Fig. 6-15. To lubricate
the bearings remove the plates from over the bearings,
flush them with an approved solvent, Fed. Spec. VV-
K-211, Federal Standard Stock Catalog no. 14-G-950,
let them dry thoroughly and repack with Navy Spec.
14-L-3 Grade C as directed in Fig. 6-15. Avoid using
an excess of lubricant.
i. SYNCHRO AMPLIFIER.
(1) The bearings in the Synchro Unit are sealed
in grease and should never require lubrication. If one
of these bearings runs dry it is better to replace it with
a new bearing than to try to lubricate it. The grease
should be removed from the gears once every six
months with an approved solvent. A light smear of
grease should then be applied with a brush. After the
mechanism has been rotated a few times, any excess
lubricant should be wiped off. Fig. 6-16 shows the
points to be lubricated and the type of lubricant to use.
j. KEYER UNIT.
(1) The only part of the Keyer Unit requiring
lubrication is the switch drive motor B-151. The Keyer
Unit must be pulled out far enough to gain access to
the Motor. If an oil can with a straight spout is used,
the Keyer must be removed completely. There is an
oil hole at each end of the motor as shown in Fig. 6-17.
Lubricate the bearings as directed in the figure.
k. SYNCHRO UNITS.
(1) The synchro units must be removed and dis-
assembled in order to lubricate them. This should be
done once each year. To disassemble a synchro unit,
remove the cover opposite the brush end by removing
the assembly screws and prying the cover off gently
with a screw driver. Exert pressure successively all the
way around the cover. Do not strain shaft or bearing.
Next remove the brush cover. Hold the unit horizon-
tally and remove the rotor, holding the brushes clear
of the slip rings. If it is necessary to remove any parts
from the shaft, note their position and reassemble them
in exactly the same position. Wash the bearings with
Federal Spec. PS-661 and wipe them dry with Viscose
Rayon Twill spec C-7-8271 dyed white. Then wipe
the slip rings clean with the cloth described above.
Lubricate the bearings by applying 14-L-3 Grade C
lubricant. Use just enough to bring the grease flush
with the top of the bearing race. Replace the rotor,
holding the brushes away from the slip rings. Re-
assemble the unit carefully. The bearings must be
carefully aligned and must not bind. Tag the synchro
with the date of lubrication and enter this date in the
log. Do not lubricate or service a synchro manufac-
tured by the Control Instrument Co.
TABLE 6-1
DAILY CHECKS
What to Check
How to Check
Precautions
Cabinets, cases, dust
covers, control panels
Operation
Motor Generator, Servo
Generator
Meters
Dust exterior, check operation of controls.
Check normal operation. All functions-
normally performed should be satisfactory.
Check frame temperature and inspect com-
mutator to see if brushes are sparking.
Read all meters and record readings in daily
log.
See Section 4 for proper operation
of controls.
ORIGINAL
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6-17
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
6 SECTION NAVSHIPS 900,946 PREVENTIVE MAINTENANCE
TABLE 6-2
WEEKLY CHECKS
What to Check
How to Check
Precautions
1. Cabinets and chassis.
2. Operating Controls
3. Alignment
4. Fuses and Ferrule
type resistors.
5. Insulators and
switches.
6. Gear Box in Bearing
Indicator
7. Cables and all electri-
cal connections.
1. Inspect for scratches, rust, moisture, fun-
gus growth and condition of cables and
wiring. Clean interiors.
2. Inspect for loose or broken tubes, loose
assembly screws or mountings, and dam-
aged parts. Examine rubber gaskets. Clean
dirty tube contacts.
3. Rotate Antenna Pedestal by hand. Note
whether gears operate smoothly and
whether there is evidence of binding.
4. Check all fan motors and fans to see if fans
are securely mounted.
1. Inspect knobs for looseness or breakage.
Look for evidence of binding in control
shaft movement. Note evidence of rough-
ness in potentiometers which indicates
wear. Try action of switches.
2. Check for loose, broken, or burned out
dial lamps.
1. Check sweeps, sweep length, and range
step. Check orientation oftearing indi-
cator with Radar Antenna.
1. Check for corrosion. Clean with sand-
paper if necessary.
1. Clean with cloth free from lint.
1. Lubricate with 2 or 3 drops of oil, as di-
rected in Lubrication Chart.
1. Look for broken or damaged cables, and
loose or dirty connections. Replace cables
where necessary. Clean and tighten loose
connections.
1. Power must be off when working
inside case and chassis.
1. Clean and repaint or revarnish if
necessary. Tape or replace cables
with damaged insulation.
1. See Section 7 if trouble is detected.
1. Tighten fans or motor mountings
if loose.
1. Return all controls to original
position.
1. Replace all defective parts.
1. For procedure, refer to Section 3.
1. Do not leave any lint on parts.
6-18
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
PREVENTIVE MAINTENANCE NAVSHIPS 900,946 SECTION 6
TABLE 6-3
QUARTERLY CHECKS
What to Check
How to Check
Precautions
1. General mechanical
inspection.
2. General Electrical
inspection
3. Geared Cursor on PPI
Indicator.
4. Motor brushes
5. High Voltage
6. Pulse Shape and
Repetition Rate
7. Magnetron filament
volts.
1. Repeat weekly inspection.
2. Check condition of shockmount.
3. Lubricate rollers on chassis.
4. Mechanically check all plugs, connectors,
terminal boards and connections for loose-
ness or corrosion. Clean chassis.
5. Clean all plugs and connectors.
6. Clean and lubricate air filters.
7. Drain Gear Box in bearing indicator.
8. Check condition of Antenna Pedestal and
lubricate as directed.
1. Remove and electrically check each tube
that can be checked on a standard tube
checker.
2. Inspect each resistor for signs of over-
heating.
3. Inspect oil filled capacitors for leakage.
4. Inspect inductors and transformers for
evidence of over-heating.
5. Check continuity of heater resistors with
ohmmeter.
6. Check condition of waveguide and coaxial
cables.
7. Check condition of all other cables.
1. Lubricate. See Chart.
1. Check brushes to see if they are worn too
much to make good contact.
1. Read meter on Modulator and record in log.
1. Observe shape Monitor Scope and observe
setting of switch on General Control Unit.
Record switch setting in log.
1. Read meter on Transmitter-Receiver and
record in log.
1. Replace all defective parts.
1. Use graphite base lubricant.
1. Do not flush gear box.
1. Do not attempt to remove tubes
while hot.
1. Replace all defective parts.
1. RADIATION Switch must be ON.
1. Do not change repetition rate.
2. If pulse shape is not . normal
report it.
ORIGINAL
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6-19
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
6 SECTION NAVSHIPS 900,946 PREVENTIVE MAINTENANCE
TABLE 6-3 (Concluded)
QUARTERLY CHECKS
What to Check
How to Check
Precautions
8. Tube life
9. Frequency
10. Standing Wave Ratios
11. Receiver Tuning
12. Crystal Current
13. Pulse Width and
bandwidth
14. Adjustment of Range
Scope Operating Con-
trols.
15. Sweep Length and
Range Step
16. O.S.C. Voltage
17. Hand Slew Control
18. Antenna Control
Switch
19. Overheat Indicators
20. Fuse warning lamps.
21. Dial lamps.
22. General Mechanical
condition of equip-
ment.
1. Read hours on meter on Transmitter-Re-
ceiver and record in log.
1. Check with Echo Box.
Record in log.
1. Check with probe on Directional Coupler
and read meter on Transmitter-Receiver.
1. Adjust local oscillator for tuning best video
signal.
1. Read meter on Transmitter-Receiver and
record in log.
1. Note setting of switch on General Control
Unit and record in log.
1. Check in accordance with operating in-
structions in Section 4.
1. Check by moving Range step to start of
sweep on each range. Move step to other
limit. Sweep should extend beyond limit
of step.
1. Switch from True to Relative bearing and
note operation of bearing dials on General
Control Unit.
2. Record type of data being furnished in log.
1. Rotate control on General Control Unit
and observe bearing dials and targets on
Range Indicator to see that Antenna ro-
tates.
1. Place switch on General Control Unit in
each position.
2. Watch dials and Range Scope to see that
Antenna is rotating.
1. Observe indicators on various units and
enter observations in log.
1. Observe lamps. If one glows, replace fuse.
1. Check each dial lamp, replace burned out
lamps.
1. Make visual check.
1. Report poor VSWR to Main-
tenance personnel.
1. Report incorrect reading to main-
tenance personnel.
1. Report improper adjustment to
maintenance personnel.
1. Always return to original type of
data.
2. Report absence of O.S.C. voltage
at once.
1. Report any failure to maintenance
personnel.
1. Report failure to maintenance
personnel.
1. Report overheating to mainten-
ance personnel.
1. If second fuse blows, inform
maintenance personnel.
6-20
ORIGINAL
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Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
PREVENTIVE MAINTENANCE NAVSHIPS 900,946 SECTION 6
TABLE 6-4
SEMI-ANNUAL CHECKS
What to Check
How to Check
Precautions
1. SR Equipment
2. Antenna and Pedestal
Assemblies
3. Switches
4. Chassis runners
1. Repeat weekly and quarterly checks.
1. Lubricate thoroughly disassembling where
necessary.
1. Check action and lubricate with switch
lubricant.
1. Lubricate
TABLE 6-5
ANNUAL CHECKS
What to Check
How to Check
Precautions
1. Repeat all checks pre-
viously given.
2. Bearing Indicator
slewing motor and
Servo Generator.
3. Bearing Indicator
Gear Box
1. See Par. 3 of this section. Completely
lubricate equipment.
1. Check brushes, commutator, lubricate.
See chart.
1. Dust gears with powdered graphite if noisy.
1. Do not allow windings to become
saturated with lubricant.
ORIGINAL
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6-21
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
7 SECTION NAVSHIPS 900,946 CORRECTIVE MAINTENANCE
FAILURE REPORT
FAILURE REPORTS
A failure report must be filled out for the failure of
any part of the equipment whether caused by defective
or worn parts, improper operation, or external influ-
ences. It should be made on Failure Report, form
NBS-383, which has been designed to simplify this
requirement. The card must be filled out and for-
warded to BUSHIPS in the franked envelope which is
provided. Full instructions are to be found on each
card.
Use great care in filling the card out to make certain
it carries adequate information. For example, under
"Circuit Symbol" use the proper circuit identification
taken from the schematic drawings, such as T-803, in
the case of a transformer, or R-207, for a resistor. Do
not substitute brevity for clarity. Use the back of the
card to completely describe the cause of failure and
attach an extra piece of paper if necessary.
The purpose of this report is to inform BUSHIPS
of the cause and rate of failures. The information is
used by the Bureau in the design of future equipment
and in the maintenance of adequate supplies to keep
the present equipment going. The cards you send in,
together with those from hundreds of other ships,
furnish a store of information permitting the Bureau
to keep in touch with the performance of the equip-
ment of your ship and all other ships of the Navy.
This report is not a requisition. You must request
the replacement of parts through your Officer-in-
Charge in the usual manner.
Make certain you have a supply of Failure Report
cards and envelopes on board. They may be obtained
from any Electronic Officer.
marAtior? ms?
NAVY DEPARTMENT
MACAU OF SHIPS
WASHINGTON. D. C.
OFFICIAL DUSINCIO
NAVY DEPARTMENT
BUREAU OF SNIPS
ELECTRONICS DIVISION. CODE 990
WASHINGTON 25. D. C.
..... TV rOO PAIWO/111.4?O TO .0.?
Or
?
7-0
Sample Failure Report Card Properly Filled in
ORIGINAL
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
CORRECTIVE MAINTENANCE NAVSHIPS 900,946 SECTION 7
Par. la ?
SECTION 7
CORRECTIVE MAINTENANCE
1. GENERAL.
a. Corrective maintenance consists of the location
and correction of faults whenever the system fails to
function. The trouble may be of a simple nature such
that it can be corrected by mechanical or electrical
adjustments or it may be necessary to replace one or
more parts. The opposite page shows a sample Failure
Report which must be made each time a defective part
is replaced. This report is important since the statis-
tics gathered from these reports can be used to deter-
mine the future stock spares requirements. These
statistics may also be used to improve the design of
equipments on future contracts. The procedures in
this section are divided into two definite sequences of
operations. The first sequence of operations is system
troubleshooting. It is based on the starting procedure
and its purpose is to locate and identify the unit in
which the trouble occurs. The second sequence of
operations locates the trouble in the unit or units indi-
cated as defective by the system troubleshooting pro-
cedure. This sequence is unit troubleshooting. A
separate procedure is provided for each unit in the
system and therefore the unit troubleshooting pro-
cedure does not consist of one general procedure but
of a number of separate specific procedures. After the
defective unit has been located, the paragraph devoted
to that unit may be consulted for further instructions
regarding the location of the fault. Appropriate para-
graphs are also included that describe the mechanical
repair and adjustments and the electrical adjustments
of each unit.
2. SYSTEM TROUBLESHOOTING.
a. GENERAL.
(1) System troubleshooting is based on the start-
stop procedure of the equipment. The equipment is
energized in the regular manner used to place it in
operation, and the performance of each section and
unit of the equipment is carefully noted. Meters, pilot
lamps, fuses, cathode ray tubes, motor-generator,
blower motors, and relays may be observed for indica-
tions of the location of the fault. Various supplemen-
tary tests may be used, such as checks on the voltages
and waveforms obtained from external jacks and ohm-
meter checks on the condition of interconnecting
cables.
(2) In order to simplify the task of locating
troubles, the SR Equipment may be considered as con-
sisting of seven systems. These systems are:
ORIGINAL
(a) Primary Power and Control System.
(b) Transmitter System.
(c) R-F Transmission System.
(d) Monitoring System.
(e) Receiving System.
(f) Indicating System.
(g) Antenna Positioning System.
(3) The action of some of the above systems is
dependent upon the functioning of one or more of the
others. For example, if there is no trigger output from
the transmitting system to the indicating system the
latter cannot function even though the transmitting
system could conceivably be functioning properly in
every other respect. A situation such as this requires
accurate judgment, because at first it appears that the
trouble lies in the receiving or indicating systems.
Therefore in locating troubles to a particular section,
it is necessary to observe all of the various sections,
noting the way in which any of them fail to function.
If the trouble is correctly located, much time can be
saved which would otherwise be spent in uselessly
checking voltages in components that would operate
normally if they could receive the proper excitation
voltages. After the defective section has been located,
the defective component should be found. This can
be done by measuring input and output voltages and
by observing the various indications on the control
panels. Another method is to slide the unit forward
from the case and with the interlock switches closed,
note whether the tubes are glowing and whether any
part is overheated. Often the start-stop procedure
directly discloses the identity of the defective com-
ponent.
(4) To facilitate the location of defective sections
and components, Figs. 7-1 and 7-2 show the primary
power distribution diagrams for the SR and SR-a
equipments. Fig. 7-3 is a servicing block diagram of
the entire SR and SR-a equipments. Fig. 7-4 shows a
servicing block diagram of the antenna positioning
systems. These block diagrams show the signal paths
to and from each unit, and an idealized waveform of
the voltage is shown, so that by means of an oscillo-
scope it can be easily and quickly determined which
section is at fault. Fig. 7-5 is an external cabling
diagram and is used in conjunction with the other
figures. Troubleshooting charts of each individual
component are included in this section which graphi-
cally portray some of the most commonly expected
troubles. After the defective unit has been located,
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
7-1
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
7 SECTION NAVSHIPS 900,946 CORRECTIVE MAINTENANCE
Par. 2a(4)
waveforms are given to be used for comparison during
the signal tracing process. After a careful visual in-
spection the unit should be energized and supplied
with the required input excitation voltages and the
input and output of the tube should be checked with
an oscilloscope, beginning with the output stage and
continuing toward the input until the defective stage
is found. When the defective stage or stages have
been located by the signal tracing method, a check of
the circuit with a volt-ohmmeter should be made. The
voltage and resistance readings obtained should" be
compared with the corresponding voltage and resis-
tance charts which are found elsewhere in this section.
(5) Possibly the most common source of trouble
is in the primary power circuits. The reason for this
is that the continuity of the circuits is not only depen-
dent upon the fuses and switches but also upon the
various relay contacts, interlock switches, operating
control switches, terminal board connections, cables,
and cable connectors. All of the mechanically moving
parts are subject to wear and, in the case of switches
and relays, they are subject to the burning effects of
electrical arcs between the contacts. Interlock switches
may keep the circuits from functioning because a com-
ponent may not be pushed all the way into its case and
properly secured. The start-stop procedure in the
following paragraph is a particularly effective method
for locating troubles in the primary power circuits.
However, it may be necessary to resort to more precise
methods to actually locate the trouble. For this reason,
Fig. 7-1 traces each circuit from terminal board to
terminal board and also includes the primary windings
of all power transformers.
b. START-STOP PROCEDURE.
(1) Close the Main Line Disconnect switch if it
is open.
(2) Press the START button on the Push Button
Station. This starts the Motor Generator and makes
a-c power available at the Transceiver. This can be
checked at receptacle J-105 on the Transceiver, using
an a-c voltmeter. The Voltage at this point should
be approximately 115 volts. If it is not, the trouble
may be due to an improperly adjusted Voltage Regu-
lator or incorrect Motor-Generator speed. The adjust-
ments in each of these units are potentiometers. The
methods of adjustment are described in Pars. 48c and
48d of this section. If no voltage reading is obtained,
check the fuses in the line switch and check the input
and output of the Motor Generator. Watch the action
of the relays in the Magnetic Starter when the START
button is pressed. If the Motor Generator runs but
delivers no output, check the exciter and the Voltage
Regulator. The meter on the Voltage Regulator should
indicate 120 Volts. Another point to check is the
commutator and brush assemblies in the Motor Gen-
erator.
7-2
(3) Place the PULSE LENGTH switch S-158 on
the Keyer in its 20 position corresponding to a 20
microsecond pulse.
(4) Place the EMERGENCY-MAIN POWER
switch S-101 in its ON position. This switch is on
the Transceiver. The MAIN POWER ON and FILA-
MENT ON lamps should glow; relay K-102 should
operate; blower motor B-102 should start; time delay
relay K-104 should start its 5-second cycle; the oscil-
lator filaments should heat up. These circuits are
shown in Fig. 7-1. If the filaments and FILAMENT
ON lamp do not glow, check switch S-102 in the oscil-
lator compartment to see if it is open. If none of the
above actions occur, check fuses F-103, F-104, and
F-107 and also the interlock switches S-116 and S-117.
For the location of the interlock switch circuits see
Fig. 7-1.
(5) Place the LOCAL-REMOTE switch in its
LOCAL position. LOCAL CONTROL lamps, 1-102,
on the Transceiver and 1-401 on the General Control
Unit should glow. If the pilot lamps mentioned in
steps (1) to (3) do not glow when their circuits are
energized, check the output between terminals 1 and 3
on transformer T-107. If any one of the lamps fails
to glow, the fault lies in the circuit that energizes the
lamp or else the bulb or socket is defective.
(6) Press the POWER ON switch S-103. This
switch is on the Transceiver. If time delay relay K-104
has operated, relay K-103 should now be heard to
operate. If this relay does not operate, check the
LOCAL-REMOTE, POWER ON, and POWER OFF
switches and the relay. When relay K-103 operates,
it makes power available from the Voltage Stabilizer
to the Indicator Console and also, to the time delay
relay in the Modulator, if the equipment has been
modified to SR-a equipment. K-103 also applies power
to relay K-101 in the SR Equipment. In the SR-a
equipment, time delay relay K-2002 in the Modulator
must also close before K-101 can be energized. This
requires five minutes. If relay K-101 does not operate,
check both relays, the upper limit switch and overload
relay K-105. See Fig. 7-1. The SR-a circuits are shown
in Fig. 7-2. The upper limit switch is located on the
cam assembly behind the lower left-hand door on the
Transceiver. If transformer T-105 has not been rotated
far enough by motor B-101 to close switch S-111, check
relay coil K-105B and contacts K-101G and K-101H
on relay K-101. These circuits may fail to function
because of the absence of energizing voltage. This
can be checked by placing the INDICATOR CON-
SOLE switch in its ON position and noting whether
the Indicator Console components are energized. This
switch is on the General Control Unit. If power is not
available at the Indicator Console, check the input and
output voltages of the Voltage Stabilizer. Also check
the interconnecting cabling and the terminal boards.
ORIGINAL
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
CORRECTIVE MAINTENANCE NAVSHIPS 900,946
VOLTAGE STABILIZER
CG-301252
3100043000%-
lioj
OIKI0001-4
lttaif
--12 0 MMOO
00000000
72106
C102
210?:9G1"
11121f-
1100000201ic?
21022
9101
40 AYR Z17.2,
TRANSCEIVER UNIT
CAY-43 AGM
OGOO
2103
Fl
9 15
S11
3-6
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211,1
04
360
0 35 0
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01030
26
0630
20
0030
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0 0
3 00000
a
o 0000 o
0
0 0 0
2 2 Z
00??
JJ L Jlii
2 3132?,
2 514 2--4,
MONITOR RECEIVER
CAY.46 ADS
2 204
0102 6205
0 103 0 0203?_,
? 20 2205?,
? 20 7205..,
MONITOR SCOPE
CAY-55AFD
2 302
-1 I-
SECTION 7
KEY ER
CAY-67 GAD
r (f(
8 8 18M
ml
HO:
11
-
1 GENERAL CONTROL PANEL
GAY - 23AEW
? ? ? ? ?
ORIGINAL
IFF COORDINATOR
CAY -23AEV
I CONSOLE RECEIVER j PPI SCOPE
GAY -46A13.4 CAY-55 ADV OR CAY-55ADV-1
EE1 E
1401
RANGE SCOPE
CAY - 55AFB
a
BEARING INDICATOR
CAY - 5S AFC
PEDESTAL
CAJS -21ACP
SYNCHRO AMPLIFIER
CAI -211103
11 1
? i.4
2 :
0 0
C71E 1-0 s??o
JL
* 10
a 8,
1?
ROTATION CONTROL
CAY 50AEB
Figure 7-1. Primary Power Distribution Diagram, SR Equipment
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
SERVO
GENERATOR I
CAY-211192
I?Y-2111921
2
I DENYDRATOR
mIEN
7
7-3
7-4
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
CORRECTIVE MAINTENANCE NAVSHIPS 900,946
VOLTAGE STABILIZER
CO-301252
( Iii
S Sa a 8 trgrg
a
10R
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00000000
10
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OWN
KMMA
3102
2103 30 AY
TRANSCEIVER UNIT
GAY-4340K
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TOO
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000000,1WWWW1
T
MONITOR RECEIVER
CAY-46 ASK
TR.
MONITOR SCOPE
CAY-55 AFD
30.
SECTION 7
MODULATOR
CAY-50A61.1
T 3003 T RJ01 T 3004
re r
R002
WNW
3 t003. T
3 ROO.
2003)1?1
001
R2001
ROIR
1642
3002
3[011
12001-
3.00,
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7 7 1 ;
GENERAL CONTROL PANEL
GAY - 2 3AEW
ORIGINAL
IFF COORDINATOR
CAT -23AEV
? ?
CONSOLE RECEIVER _I
CAY - 46ADH
? ?
"an3
PPI SCOPE
CAY-55ADV OR CAY-55ADV-1
1 d-r ?7+171
g
Ii
1,601
RANGE SCOPE
GAY - SSAFB
BEARING INDICATOR
GAY-55AFC
0
PEDESTAL
CAJS - 21 ACP
ft
7g,r,
SYNCHRO AMPLIFIER
101
I I
CM-211103 ROTATION CONTROL
CAT - 504EG
Figure 7-2. Primary Power Distribution Diagram, SR-a Equipment
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
SERVO
GENERATOR
1 0_1Y-211192 OR
CAT-211192 A
? ?
_1
1? -1
DEHYDRATOR
CAKE1- IOAEK
7-5
7-6
CORRECTIVE MAINTENANCE
ECIIO 100
ANTENNA
ANTENNA
? OUPLEXER
J-315
TRANSCEIVER
CAY-43006
+2
9-110 0
St?
R. F.
?
FREQUENCY
CONTROL
ID
3
V 101
J-2002 0 0 J-t001
ILOCKING
050.
7-2002
2 05/1211
4-0003
ISOLATION CHARGING
NODE . GIMES
3
TRIGGER 0180 RANGE
POLLOWER TUBE
MODULATOR
CAY-50A6U
P,I15
J.10.
RADAR
PULSE OUT
TRIG:11
3
T-0005 2
01 ,
IIW., F
CUFF I .1.305
R-301
R-301
0
PV1Y
v-301 A
ESN TOT
5-3018
0
TRIGOER
GENERATOR
?MULTIvfORATOR -
O 0
4 f ISN7QT 'F e-4 gif:r
1.301 1
IJ-307
0-30511
0 GATE
CONTROL
TRIGGER
CONTROL
S-3010
G
OMIT
SWEEP
GENERATOR
r?P-.6D4:8=
2 J-308
riSaLRIVP
Declassified and Approved For Release 2013/11/21 : CIA-RDP67B00341R000800090001-3
V-304
SOPS
6 10309
1
4-3I3 5-301 C
SWEEP SWEEP
AMPLITUDE SELECTOR
..- CONTROL
i-ave
DEFLECTION
PL TRANSFER
R-342
VIDEO
MAR '
0-307
NAG? I
PER CAL
MONITOR SCOPE
TYPE CAY-55AFO
4-3,90
TEST SIGNAL
INPUT
0-302
-0140RIZONTAL
CENTERING
/8-33,
- -0 room
, (15 FRO-CIS
BALANCE
R-528
INTENSITY
CONTROL
, R-324
40 VERTICAL
CENTERING
NAVSHIPS 900,946
TRIGGER PULSE
FROM RADAR
TRANSMITTER
83011004
60,
I'S
EGO:
/-
PULSE
AMP
v-600
TOT
--1--muLTIVIBRATOR
2.6006
808701
J614"9
a
/ Or; 3 ARM
oRgWEEP LENGTH
0 3800G
==rosowNcf&
rasa
P.
601
622
OWE
INANTASTRON
PHANTASTRON CATHODE PNANTASTRON
DELA?' FOLLOWER CLIPPER
007
RIO
0 V-602
0547
0 s..2,? 00
5800A I ,
0 0
, SATE I i
/ CONTROL
SNEEP
7607A
'1600
J627
6 j 6 R 6037
ROD? 8628
SLOPE
CONTROL
FOLLOWER
J613
SHOCK
, OSCILLATOR
2-610A
811761
076000
6567131
SWEEP
ANP
i116 2110711
EN 5
"K
0634 R635.4
PNANTASTRON
AMP
1
mm8 3
11-6038 04:147:
JAW
jT
600E
ERO
8834_RIGS
Feca00Lus'i--
695 6'01:171:11111- OPALTNIE 8140
0 ?
TRANSFORMER &En INPUT
VIDEO
2
IP612 ? fi
6787
PP1 ,
MARKER OUT
81 EROS
RANGE SCOPE
" tA6C137- 5.
6
5
VERTICAL 444,
CENTERIM00----
VIDEO
INPUT
TWO
.?r4IL6N1061:1 OUTPUT
641V- 66:067
I 818 _
R6028
81.08
CONTROL
8001 603 1:03
TYPE CAY-55AFB
DELAY
LINE
Gp DAMPING
DIODE
ILK AMR 000(8
GL-446
V-201 V-003 I
01.-441
0 ? RP
TUNING
I CEO,
2-002
955
1
C-207A
OSCILLATOR cok
TIMING N/
J-I03 1F-103 .1-203
1-2 IF
7204-5
SAGE
200
5
SIP ? IP
v-207
4 ;ACP . &ACT
0 4-Ge4
P- fir
DETECTOR
L'.321-2 30.-2.8
J-202
p-IO2
J102
7200
7105
R-135
26
E-205
28
E-105
SAM
CONTROL
ECHO BOX
NOTE: MODULATOR USED ON SIE-o ONLY
ORIGINAL
MONITOR RECEIVER
TYPE GAY-46A0K
ID
SOAR *
LINE
"Min
4.10,
SENSITIVITY
CONTROL
3-143
R-144
111101
7
3-001
878
8-005
-0
IRO
IRS
TRANSEtiviA?
LOCAL- REMOTE SWITCH
1
H
4 o
op T3,2
L_
TIN
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0101 1005
800E1010 01Ellot 1
IFF VIDEO
IN
6010E1004
61 84
(1100. E%10 11000
1113 93 83
205A
a,m4:24r_o_._04.00511 ? ?
81001 E1007 ES05 DWI J.I2
28511 085A
SECTION 7
L=7,
0500
7
PULSE
AMP
PULSE
ANA
12,23,11,2112
-MULTIVIORATOR
SWEEP SWEEP SWEEP 00 SWEEP
GENERAToR ANA AMP RESTORER OUTPUT
S S001
, 1 I
6R510
/ R503 R509
GATE WIDTH
//
VS 02
SNTST
--,78 woo
7 7
I 7 1 1
I I I
I I - I I I
3/818 ,I, 4, lima 11
0520 R5f9 R564 ,Ilssl
SWEEP LENGTH ' BIAS R5006
8550
.50344 p-
6SN 5. r
9502
CENTER
EXPAND
TRANSFORMER
y50614 P 0 2-5068
1170T3?'4605161
J523
Jgt
53000
000
TANKS
5804 RESTORER
3
?-11.?.-
6, AG87
R539 6
INDEO
GAIN
vIDEO
AMP
INTENSIT R 554
COARSE
INTENSITY
8553
PLAN POSMON INDICATOR
E SOS
101
FOCUS
COIL
1
'Val r 11!) r 576
vale
GR TUBE TSP?
PP? SCOPE
TYPE GAY-55 ADV OR 041-55 ADV-I
1608
EOM
2'1003
REJECTION
FILTERS
9
J701 J701 II-
0 - 701 ".1-104..
008
E1005
228
1700
PRIF
ram
1E0
00
E1003
403
?1001
to
E702
403
E700
0
ECHO SOX
4
IF
L01
4-5 IF DETECTOA
IZ__1226 AG v-101, 5-5 viiza P G
4
-7- ----- -1.4T;
ARP
SP P700
T4L''.0 0 C:0.?I8
0SIC
IF BAND rss
7C3
GAIN
Como,
IF CENTER
FREQUENCY
CONTROL
VIDEO
AMP.
VG;
LII-
(DON
K 10107A P C
DETECTOR 8- 0?51.? 1:L7A
? 6,46
11 702
RANGE SCOPE NO ?702
110(0 007
685
E1004
1004
E io07
101
E901
VIDEO
AMP
13, V 7:C
PULSE
LIMITER
11701
0-760
.01 ...A.
UFO
DMAROINE
01001
v4171 P
4 6 5
010
'-' FOLLOWER
v-711:4111L_
4 7 5
6111
R-7010
STC
?
CONSOLE RECEIVER
LIMITER
6 V-7,1;I
20TP
4 5 5
6261
0703
.474 02141
a
8201 1000
IF? VIOE0
IN
VI EAP NOG
o me 764
4 OAST
VIDE AMP No,
701
IIVE0 AMP
MOO
?708
? VIDEO ANA 1110.1
41AG7 S.