SOVIET TECHNICAL DOCUMENTS ON THE ARP-50 DIRECTION FINDER AND THE PORTABLE ELECTROMEGAPHONE, TYPE PEM-10/2

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A064800280001-2
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 156
• Document Creation Date: December 27, 2016
• Document Release Date: March 18, 2013
• Sequence Number: 1
• Publication Date: July 15, 1963
• Content Type: REPORT

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WAIN ? V
50X1-H UM
?'Ns:. , CENTRAL IN IGENCE,A6ENCY, N
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18. U.S.C.
This matmisaecis.con3tains intorno' C?oif affecting the National Defence of be United States within the meaning of the Espionage La"'
704 the or revelation of i
mon rohibite by law.
79 and , t whieh n alirmanner to
J ..,
ei.d TNT CgEM
COUNTRY USSR
REPORT
SUBJECT Soviet Technical Documents on the DATE,DISTR. /6 July 1963
ARP-50 Direction Finder and the
Portable Electromegaphone, Type PEM-10/2 NO. PAGES 1
REFERENCES
DATE OF
INFO.
PLACE &
DATE ACC
50X1-HUM
50X1-HUM
50X1-HUM
THIS IS UNEVALUATED INFORMATION. SOURCE GRADINGS ARE DEFINITIVE. APPRAISAL OF CONTENT IS TENTATIVE.
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Automatic Nasisation 50X1-HUM
- 0: B ief Descri tion and Operating Instnactima,
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(Note: Field distribution Indicated by "#".)
50X1-HUM
INFORMATION REPORT INFORMATION REPORT
50X1-HUM
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It
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AUTOMATIC NAVIGATION
DIRECTION FINDER APFI-50
BRIEF DESCRIPTION AND OPERATING
INSTRUCTIONS
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......... SmOreMOKIM
.000
I.. PURPOSE
The automatic navigation direction finder APII-50
is designed for mounting on shipboard
The main puTposo of the automatic direction finder
is to determine the place of a ship in the sea by taking
bearings from omnidirectional radio beacons and stations.
As compared with aural direction finders the R.D.F.
APH-)50 has better operating properties which are
ensured by:
1. The Use of the follow?up system which makes it
possible to obtain automatically radio relative bearing
and bearing as well as to follow continuously a bearing
direction.
2. The use of electrical and mechanical radio
deviation compensators that almo2t entirely eliminate
radio deviation (within L-1-00)4
3. The use of avtomatic minimum cleaning (up to
2 '3 per cent) manual control being used. during aural
bearing oDeration.
40 The use of tuning pointc)r indicator t To obtain
a radio bearing (or radio relative bearing) when employ?
ing R.D.F. APH-50 it is flecessary to tune the receiver
to the desired radio beacon froquency, after wIlich the
goniometer indicator is automatically set in the radio
bearing -position.. This reduces the time required to
obtain results several times ao compared the time
required for aural beaTinj opel-ation,
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*Wp..1.,**4OMSMOMIMO
PURPOSE
The automatic navigation direotion finder APH-50
is designed for mount :Li. on ilhipboard.
The main purpose of tho automatic direction finder
is to determine the place of a ship in the sea by taking
bearings from omnidirectional radio beacons and stations
As compared with aural direction finde the R.D.F.,
AP1150 has bettor operating -properties which are
ensured by:
1. The use of the follow up system which makes it
possible to obtain automatically radio relative bearing
and bearing as well as to follow continuously a bearing
direction.
2. The use of electrical and mechanical radio
deviation couryansators that almost entirely eliminate
radio deviation (within 4).50).
3, The use of al)tomatic minimum cleaning (up to
2 -'3 per cent) manual control being used during aural
bearing operation.
4# The use of tuning pointer indicators To obtain
a radio bearing (or radio relative bearing) when employ-
ing R.D.F. APH-50 it is necessary to tune the receiver
to the desired radio beacon frequency, after which the
goniometer indicator is automatically set in. the radio
bearing positionv This reduces the time required to
obtain results several times ac compared with the time
required for aural b6arinj oporation4
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If necessaryt the automatic direction finder can be
used as an ordinary aural dire6tion finder
II. COMPONENTS
The commercial R.D.F, APB-50 set .general view is
shown in Figol*
The operating Rana. KPH -0 set consists of the
following parts:
1. Loop antenna units
2. Non--directional twopowire antenila.
3. Antenna box.
4. Receiver?andx-gontometer unit in a casing with a
mounting frame.
50 Supply unit with a mounting frames
6a Control distribution board;
70 Two signallinr.l: boards,
84 Two dynamic loudspeakerso
9* Headphones with a headband (f0A044)
10 Cords complete with pluga to plug in dynamic
2oudspeakers.
/41, Converter 0.1 120 (only with DC 6 main sup-plyp
110 or 220 '00
12. Autotransformer 220/127 v (only with AC, main3
supply) 220 If).
The commercial set differs from the operating set
by the presence of following additional parts:
1Q Tester TTv-1,0
24 Shipboard set of spare partsg toola and
accessoriesb
Overall dimensions and weichts of 11(ndividual paxits
of the direction finder operating aet ar9 given in tho
following table:
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Nog
1
9.44.041
s:f
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4.MOVPM 4.41,4.,4404.W.414
Description
2
Loop antenna
unit
diameter 0.6-m,
diameter
Loop antenna
unit support
Antenna.
!components kit
Antenna box
Receiver-and
goniometer unit
in casing with
a mounting
frame
Supply unit
with mountlng
frame
Control
-
distribution
board
00.1t *lot 00* fter? .000 galopilme gap
? 21500 1592 1200 1200
14000 1000 600 600
1
3500
1 1 1600
40000
27000
240
240
7751 190
353 310g5 600
515 f 171 3'56
3800 270
115
330
The
set io
provi-
ded
with one
of the
given
an
Compo-
sed
accord-
ing to
a letter
index
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3
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6,014,/4, MO:PIPP,10 01040.1,Reft, WO% ftla-beelmas.
5
11.110."*W4010.1141.4110.04.4.
Desc' rip tion
o r-1
tri
c?4---)Pd
3
LOUp antenna
unit 1,2-m, 21500
diameter 0.6-m. 14.000
diameter
4
0.44 roma
Loop antenna
unit support
Antenna
components J.fit
Antenna box
ileceiver-and
goniometer unit
in casing with
a mounting
frame
6 Supply unit
with mounting
frame
_Control-
distribution
board
,
9000
r-
1592
1000
1600
3500
1600 1 175
40000
27000
3800
6
Oft01~100 Muft4.070OWei4
Ei
t3,)
7
1200 1200
600 600
240
6.)
-P
0
111,0
o---f
a
The
set io
provi-
ded
with one
of the
given
an-
tennas
240 Compo-
sed
accord-
ing to
a letter
Index
773 190
353 310..5 600
515 171 356
270 1 115
330
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2
10., 4...mt, A05.0.01 40000,...0 .0O 10..000
Signalliag
board
Dynamic
loudspeaker
10 Headphone
TA-4
1
11 Cords with
plugs for
12
Iconnecting
dynamic
loudspeakers
Converter
OH-120
I
3 Autotransfor?
mer 220/127 V
OPMFA 000.
o0.0t001.00e0.r.4.4
4
6
0 0.0b mclf r00. PON 004 404 wow
404 le.#4 .6 404a
1200
1500
800
WA,
25000
.0n0
185 1 89
204 9!.:55
190
1 11
1 I
I 1
I
'set.
345
260
Rest.11,.4
ant DX,c
resis. ?
ance
4400 ohms
,000
I
260 460 I Compos ed accord?
ing to N.
lett or
tlide
1
4.r.5
190
UOMp05
ed accord?
ing to
letter
The direction finder unit &Tao intaTconnocted with cables
while the loop antenna unit and antenna box are connected
with the receivea? and?goniometex unit by means TY a feedero
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III. DIRECTION FINDER MODES OF OPERATION
10 Automatic Bearing Operation
ttelha4ms*.ft.tm*saast.,
Automatic bearing operation is the principal mode of
operation of the direction finder. During automatic bear
Ingoperation the direction finder p when tuned to the
transmitting station frequency automatically sets the
goniometer pointer in the *position corresponding to the
radio station bearing read off the movable goniometer scale
The station signals can be heard in the headphones
and dynamic loudspeaker only if the station employs
modulated oscillationsl as in this mode of operation the
second heterodyne is switched off.
Aural Bearing Operation "C"
During aural bearing ol?eration the automatic direc?
tion finder- operates as a-conventional aural direction
finderm
On tuning to the transmitting station frequency the
direction finder makes it possible while listening to the
station signals and turning the goniometer search coil, to
find the search coil position corresponding to the minimum
receptime
In this position the goniometer pointer indicates the
radio bearinie; (on the movable scale). The radio station
signals can be heard .in the dynamic loudspeaker and head-4
phones irrespective of whether the station transmits
modulated or unmodulated oscillations as the second
heterodyne operates in the receiving unite
34 Frequency Watching "
4/0.6411 Oral/ 1.12.1.
During frequency watching the direction finder can
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be used as a conventional communication rocetver highly
sensitive and interferen-ce?proofed. It may be used for
navigation by approach beacons as w0110
In this mode of operation the direction finder
allows the signals of the stations, that employ modulated
and unmodulated oscillations to be heard headphones
and dynamic loudspeaker.
With a crystal filter used it is possible to
decrease interference in all direction finder modes of
operationt
IVv DIRECTION FINDBR BLOCK DIAGRAM AND
PRINCIPLE OF OPERATION
Direction Finder Block Diagram
The direction finder block diap:ram (Fig04) includes
the following main elements:
(a) loop antenna unit;
(b) goniometer;
(c) phasing commutator
(a) loop amplifier;
(3) non?directional antenna;
(f) receiver;
(g) telephone output amplifier;
(h) contilol circuit;
(i) direction finder output amplifier;
(j) audio oscillator;
(k) motor, rotating the goniometer search coil
With reducing gears
Direction Finder Operation PrincipleL.J,nd the
Purpose of individual Components of the Block
DiagTam (Fig44)
l. The direction finder loop antenna unit conriiots
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dr% SIM
of two loops fitted at right angles to each other, Each
loop is connected to a separate stationary goniometer
field coil, The two field coils are similarly at right
angles* The incomil)g electromagnetic ware induces currents
in the loops and consequently in the geniomater field
coils. These eu.r:cents aet up a magnetic field within the
field coil,s
1.4/sIa
these field coil there
13
ing coil .callott the search coil, Electromotive fort:
SOS
up in the oeach coil depends on the coil angle f rotat.J.on
in the field inside the field coils. This relationship
resembles the :vela low.thip betweerl the
7.4 6,7.1?1 1.11(1
;
?
h 71 73 UP in
simple loop and the direction of a transmitting aerial
(See ?
6 7) #.
As seen from the iluc)ure ;?here are two posit:tons of
the goniometer search eoil in which the resulting
induced by the oisaal field across the terninan is Ocial
to ze'ro In al/ other positions the EMJI. sot up by the
field is not zero and chanj:.;ar:1 with an angle of rotation
increaaing to some maximum value.
Polarity or phase of the E4M,F, set up by the
transmittev in the right?hand dire(!.tion are opposite to
those -Induced by the transmitter in the left?hwad direc?
tion) the directions being read from the minimum signal
strength line ? the bearing line,
Voltages and currents obta,ined in the loop depending
on the transmitter direction are shown graphically in.
Fis?6, Voltage devoloped across search coil terminals is
,given in part "a of Fig*65
As is seen from the figure with the goniometer
search coil directed towards the radio station, the search
coil terminal voltage equals oro0 With the goniometor
search coil displaced to the right or to the left from the
transmitter direction the electromotive forces across the
search coil terminals are opposite in phase.
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20 The signal voltage from t,he goniomete? sear(th
coil terminals is suppliea to the 'ohasing commutator
(Fig* 4.--e)0 The phasing commutator controlled by the
audio oscillator (Ft4s, 4-.Aj) shifts this s:ignal phaao
by 180? each half-Pcyclo of the audio oscillator fxequency 0
Fig0 6.5-1) illustates the Arvitage at the phaaing
commutator output0 The figuxe shows a pertodic signal
phaae change and opposite pha.ses core$pond:tng to the
search coil diszaaoement to the right and loft fxom
the beartng direction at every given momentv
30 After the phasing commutator the sign1,l is
ourtplied to the loop amplifier (Fig o 4?d); amplifiod
In it, and fed to the receiver input (Figc. 4?f)
40 The non--directional antenna voltage is
supplied to the receiver input as well (Fig 4e) The
Edila. induced by the sisnal field in the nonlv
tb.rectianal antenna does not depend in value and phase
ou the direction of signal arrival. In other words,the
radiation pattern of such antenna is a circle
Figo 6d-c illustrate the receiver input voltage
from the no.a?diTectional antennat The receiver input
voltages from the non--directional and loop antennas are
itho'r added or subtraeted in accordance with their
phaso re1ation4 IX thc phases of these signals (1.oincidep
the signals. a:ce added and the resulting oscillation
amplitude increaseo; i2 the signals are opposite in
phase, they are subt:racted aAd the resulting signal
amplitude equals to the amplitude diffeence. As the
loop input voltage periodically changes by 180? in
phase; it either adds to the antenna signal or subtmote
from it causing the amplitude of the resulting signal
at the receiver input to change periodically ? amplitudeft-
modulated oscillation (Fig 0 6d)0 Amplitude changes of
Cl
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this resulting oscillation take place at the commutating
frequency of the loop input signal which is determined
by the local avOio oscillator In other words, the
envelope frequency of the amplitude-modulated signal
developed at the receiver input is the frequency of the
audio osoillatex'4
The envelope phases resulting from the search coil
dispiacement to the right and left from the bearing
direction are shifted by 180?6
It is explained in the following ways Suppose that
with the search coil displaced to the right from the
radio station direction the input signal phase is such
that in the first half-cycle of the commutating frequency
this signal adds to tho antenna signalo Thus, the
envelope phase of the resulting oscillation during this
half-v,eyele of the commutating frequency JJ5 positiveo,
Now, it vs change the direction of the search coil
displacomonto Suppose that it deflects to the left from
the bearing direction The goniometer search coil terminal
voltage shifts by 180? in phases Thuss duxAng the same
commutating halftmcycle it will be subtractiid from the
antenna 8ignalt1 The amplitude of the resulting oscillav-
tion is lower thn the antenna signal amplitude, ie the
envelope phase during the same commutating frequency half-
ycle will be noBative (See the right and left Sections
of Fig c 6.4,1)4
nth the search coil in tho bearing positioa the
signal voltage across the goniometer unit terminals
becomes equal to zero and the receiver input is
supplied oaly with the nonwo6irectional antenna voltage
(Sec the middie Section of Fig46.-d)Q
,0 Amplitude-modulated signal developed at the
receiver input is further amplified in the receivers
frequency converted detected and from the detector.load
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its low?frequency envelope is supplied to the direction
finder output amplifiar. This stage tuned to the audio
oscillator frequency calscriminates and amplifies only
this component of
tho
detected signal.
This voltage, whose shape is shown in Fige 6?e2 is
stipplied to the control circuit from the automatic channel
output stageo
6. The signal cemses voltage tp be developed in
the control circuit (Fig. 6?f) which is supplied to the
induction motor control winding and drives ito Across the
motor second winding (excitation winding) the voltage has
a constant value and phase
Direction of the motor rotation is dete:r:mined by
the voltage phase supplied to its control winding which
in its turn is determined by commutating frequency sigivAl
phase arrivins at the control ci.zeuit input
Thus, when the ooL.,rch coil deflects, for excimplo
to the left from tho bearing direction signal appeares
at the goniometer output whose hiL4h,..frequency phase is
determined by the side of the st3arch coil deflection,'
This voltage is commutated in tha phasing commutator an17
being added to th,o non?directional antenna voltage at the
receiver input, is convoPted into am)litude?modulated
oscillation. In this now voltage the low-,frequency
envelope phase is
phaae from the
detorminud
by
oniomoter unit,
the 3ligh?frequency
lot by the search
coil
deflection direction 4 After the detector the commutat
ing frequency component, disc2iminated in the bearing
output amplifier, is convert.ld in the control circuit
into new voltage having a phase that is determined by
the phase of the signal applied to the control circuit
input, Motor switchi:a OR is ad :looted rtD that It
starts rotating counter?clockwisev 1.00 to the left
s?
ti
tlt
vo
ill0
ac:
as
co:
oui
tIlt
ihit
co:
ti(
is
th
Uc
amp
rec
0.as
In t
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13
len:the voltage. f this phase is fed to its control
ifldiflL
'The motor axle is coupled through the reduing
,4x,witil the goniometer search, coil and the motor While
tating 'will turn this coil to the left i*elo to the radio
ai,on,bearing directions
, In the, bearing position, when the output signal at
il'direction .4nder loop input becomes equal to zero, the
c.eiver'input voltago is no longer amplitude-modulatedt
IjA3 SJgxIal d'oes not arrive at the control circuit and
Is not 'supplied to the motor control winding* The
:toter
Men the search coil deflects to the left
oM J e:boarin8 direction the voltage that establishes
across the goniometer unit ornu.nal i 180? out of phase
compared with the voltage developed during the search
A 1 deflection to the l'i&at from the bearing The final
voltage oupplied'to the motor control winding is also 180?
out of phasep thus making the motor rotate c1ockwise.0-
4hile rotatinglit turns the goniometer search coil to the
thtie back to the bearing direction*
It shoul,d be noted that when the goniometer search
oil deflocts'180? 'from the bearing (back bearing direc--
164) thevOltage of thee loopinput, as is seen from Fig*6,
s _ecival,to zero in this Case only the antenna supplies
the receiver input and the motor does not rotate* However,
this equilibrium 1position is unstable4 With slight def1ec-4
tion from this position the loop channel feeds voltage,
ampli.tude-4mo1ulated, oscillation is developed at the
receiver input and the motor rotating as in the previous
oases, sets;t110-6eamh ,coil in the bearing position4
Thus at any deflection of the system from the b'ear-
lasposi:tion0-oltage automatia11y generated in it
ttuses, thernot6r.:tootates :thus bringing the system back
in _the bearil )os1tion4,
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7. A pointer is secured on the same axle with the
search coil. When the search coil is
rotating, the
pointer is moving along the scale which is calibrated
every 10. Zero pozition on this scale corresponds to tho
-Pointer position with the search coil adjusted to
indicate the bearing of the radio station located along
the shiDfs fore-and-aft line, Thus, the pointer reads
an .an,gle formed by the .radio station direction and the
ships fore-and-aft line, 16e the radio station relative
bearingt
Te goAiometer is provided with one more scale?,
This scale irJ movable aild is coupled to the gyrog-compat7.s
by means of selsyns; this scale pointer reads the radio
station bearing
8. This discussion deals with the use of this unit
as an automatic direction finder. If used as an aural
direction finder (in "Co mode 'of operation) the phasing
commutator operates as a high-frequency amplifier the
audio oscillator and control circuit are switched off an4
the direction finder roceivor serves simply for
amplification of the signal coming from the goniometer
unite The being position is determined by the minimum
of signal strength when tho goniometer search coil is
turned
:DLIVICr.Haii PINDER KEY DIAGRAM AND
P.RINGIPLE2 OF OPERATION
1. Direction Finder Circuit
For the direction finder key diagram see Fig. 25.
It may be divided into the following secti.ons:
(a) loop antenna unit and non directional two-wire
antenna;
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(b) receiver?and?goniometer unit;
(c) supply unit;
(d) control distribution boarde
The loop antenna unit and two?wire antenna make
possible directional and nonf-directional reception?
The main and most complicated unit of the direction
finder is the receiver?and?goniometer unit which ensures
the direction finder performance4
Voltases required for the receiver?and?goniometer
unit are fed from the supply unite
The distribution board serves to check the voltages
Xed from the supply unito
(a) noon Antenna Unit,andjon--Directional
Twow-Wire._. Ante-Ana
1. The loop antenna unit consists of two loops
fitted at right angles to each ?there Screening and mid-0
point grounding of the loop windings through a capacitor
serve for decreasing the antenna effect
26 The' non,=-directional two,..wire antenna consists of
main and compenaating wires?
(a) During automatic direction finding the main wire
ensures normal direction finder operation e During aural
direction finding this wire is used for manual compensa?
tion of the antenna effect (zero cleaning) while during
frequency watching it serves for signal receptiono
(b) The second ? (the so?called compensating) wire
serves for automatic compensation of the antenna effect
during aural and automatic bearing operationo The signal
from this wire is taken to one of the goniometer field
coils through a high?frequoncy filter (1,1-47; CI-1)3) and
zero sharpening control (BI-7) by means of a jumper RI400
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-16-$
Both wires are coupled to the antenna box partition
insulators and furhter (with the help of a feeder) to
the receiver-and-goniometer unit. For draining electric
charges both wires are grounded through resistors R6,44
116-2g Neon lamps protect the direction finder from over-A
voltages that can be applied to the antenna wiresa
(b) fl eiver-and-Gonlometer Urdt
For the general view of the 'receiver---and--goniometell
unit see Fig.10 (a, b cp and d)0
Let us analyse individual elements of the xecelve
and4*goniomoter unit key diagTam.a
(1) Goniometer
f) 9 0 p
As shown tthove, the goniometer consists of two ?'old
Coils (LI4a, 0, (LI-2a,b) and one search coil (LI-3)t
The loop ends are connected to the goniometer field coils
by means of a feeder* The soniometer search coil is included
into the loop circuit, The loop circuit is a resonance
circuit tuned to the frequency of an incoming signal
in is formed by search coil, circuit coil and
antenna variometer rotor, The caacitance includes
variable capacitors C1-11a, C1-116, a fixed capacitor
and a tr, mmor. The variable capacitors are the sections
of the variable capacitor assembly and are switched on in
all bandso The circuit coils, trimmers and parallel fixed
capacitors are switched over from one band to another
with a special switch ganT'od with a band selector switcho
A coil L10,6, a trimmer C1-5 and a fixed capacitor C1-6
are switched on in the first band; a coil ill 55, a trimmer
CI-3 and a capacitor C1-4, in the second band; and a
coil L1-4, a trimmer C1-1 and capacitors CI 9, C10-12 and
C1-13, in the third bando
Co
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?17..
?. In all Ithe bands a neon lamp is connected in
parallel with the circuit. Its purpose is to limit valve
grid voltage of the phasing commutator. In all the bands
the variometer rotor of the manual antenna effect
'compensation, is connected in series with the search coil.
ThelooD circuit is shunted by a resistance R1-18
in "A" mode of operation so As to decrease the antenna
effect (if detuning Is present) on direction finder
accuracy.I.
The capa itors C1-1, Cl4, C16 Cl-Tand C1-13
are thermocompensating devices.
The 'loop circuit is connected to the phasing
commutator valve grids.
(2) The phasing commutator (311.4 J11 2)
'egastogatowestOetibaaatoatetb0004***PV 9 6
The Dhasing commutator employs 6X4 valves.
Highfrequency voltage of the loop antenna supplied to
the phasing commutator valve control grids from the loop
-circuit is of the same phase and amplitude*
Simultaneously, low-frequency voltage of the same
_amplitude but shifted by 1800 in phase is supplied
to the phasing commutator valve control grids from the
audio oscillator.
As the result of the phasing commutator and audio
oscillator -operation hi 1.4.frequency currents of the
loop antenna flow intermittently in the plate circuit
of the first or the second valvoq
Initial bl_as is supplied to the phasing commutator
valves from resistors R1-16 and R1 37 through leak
resistors R11-13 and R1-154
Valve plate voltage is supplied through R1-21
resiator, blocked by CI-2.1B capacitors Mese elements
'X'snia a decoupling filter cello C1-23,.6 capacitor blocks
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-18-
cathode resistors for high frequency.
A circuit consisting of L1-7, L1-08 and L1-19 coils is
connected into the phasing commutator valve plates* The
circuit is designed so that electromotive forces induced
by valve currents in the secondary winding of the circuit
(L1-9) differ by 1800
.
In addition the phasing commutator shifts the phase of
the loop input signal by 900. This phase shift is found
necessary to bring the signals applied from the loop and
antenna inputs in phase. To ensure such phase shift the
resonance frequency of the phasing commutator circuit is
selected higher than the highest frequency of the band.
The circuit coils 11-7 and L1-8 are connected to the
phasing commutator valve plates. They are made as one coil
with a middle tap and are connected so that, as it was shown
above, operation of one phasing commutator valve causes
voltage of one phase to be induced in the L1-9 coil, where-
as operation of the other valvo induces in it voltage 1800
out of phase with the first. The 141-9 coil in its turn is
connected to the loop amplifier grid circuit.
The phasing commutator performs its main function
with the function switch in "A"position, With the func-
tion switch in "Cu position one of the phasing commutator
valves (111.4) operates as a high-frequency amplifier,
whereas the second valve (I11-2 ) is cut off by high negative
bias by way of disconnecting the common point of R1-13 and
R1-14 resistors from the ground (which is provided by 131-3a
switch).
The audio oscillator is switched off by removing the
plate voltage from thQ valve with the B1-3H switch.
With the function switch in "A" position the phasing
commutator Is o?'?' Plate and sc:coon voltages are taken
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from the phasing commutator valves by a Bi
()) The loop channel amplifiex# (a1-4)
ot000 ocootAot*okleo c,o 4-0 arose? toti, 0,14
switch,
The loop Oaannel amplifie:17 amp:fieri high*.frequenvy
voltage applied from tho loop antennae The loop eLEurriel
amplifier employs a 6E4: valve Reni,15tors R1-24 and
R1-2, shunt.,(ad by & C-1.7423a capacitor and connected into the
valve cathode cicuit do47elop biaso
Valve plate is fed thx'ough L142 and Li 13 cbokeo and
R1 26 resistoze The L1-013 choke and C1-0,24 capacitor as well
as R1P.7.26 .Tesistor and C1-2:3 -13 capacitor are decoupling
filter cells Three, coils (one for each band) inductivol
couoled to the input antenna circuit are connected to thk!1
loop amplifir plate cil'euit,, These coupling collo serve at
the same time as coupling coils in connection with the
antenna, A Cl p6 capacitor is an Inolating Gapac-ito, Tha loo
amplifier stage is switched on with the function
switch BA-?x in "Air and aC" positions and is off
(voltage is Aot supplied to the valve plate) with
awitch in "A" positiono
(4) The audio oscillator (A1-3)
$ 4 h 0 4) 3 () p4'.i,31$04'4'o
the
The audio oscillato:v uses a push--pull generp.twp
ci;L.cuit tA=13-:d an a 6118C valvo Its purpose is to control
the phasing commutator and control circuit valves
(3i17-14, Xie-15)*
The element determining generated frequency :Ls a tank
circuit whose function io perfoed by a tuned transformer
Tp1-4. The tra.Asi'omer has two windings: primary with the
middle point taped, the ends of this winding being connected
to the audio oscillatoar valve plates, and valve plate
supply voltage of the audio oscillator being fad to the
middle point and the secondary, the itep-up windinsi with
the middle point grounded0 The secondary ends are connected
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to the screen grids of the control circuit valves. The
primary is tuned to generated freveacy by the capaci
tor C1-16. Audio-frequency voltage generated by the
oscillator and fed to the phasing commutator valve grids
through a circuit consisting of resistor R1-4y R1-5 and
capacitors C1-141 Cl-l5 is of same amplitude but in
antiphase. Voltage from the two ends of the Tp1-4
transformer secondary supplied to the control valve
screen grid; is in antiphase but of the same amplitude
(5) The suprheterodyn e reCeiver
(a) Hish,-frequoncy amplifier (Al2-.5)0
The receiver ReF0 amplifier employs a 610 valve
The antenna tank ci:ccuit is comleeted to the
amplifier grid circuit4
The si!nal voltage from the non-lirectional antenna
-qmid the loop anteana voltage conveyed via the loop channel
are simultimeously appliod to the ta.l.k circuit with the
function switch in poLlitiono
In "C" position only the loor chmviel supplies hishc--1
frequency volta8z:: to tho tank cilTuitp whereas
position only the non-directional antenna does.
The signal voltage f:rom the loop channel is
supplied to the antenna tank circuit by means of :inductive
capacitive coupliag. The sIgnal voltage from the non-,
directional antanna is also supplied to the antenna tank
Circuit by inductive-capacitivo couplingo Inductive
coupling is prtrvided by coupling coils L1*-14 L145,
11/-416; capacitivo coupling - by a capacitor C1t-38. The
tuned antenna ci:rclJit includes a so1find1ctor, a trimmor
a fixed capacitor and a variable cx)acitor C1-11730 The
variable capacitor is a section of tha receiver variable
capacitor assembly and together with the capacitore 01-%26
and C1-38 remains connected over all the bands. Other
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element included into the antenna circuit are switched
-when. changing, over from' one band to another; L1-619 9 C1)4 ia
C1-36 are switched on, over the first band; LI-18p
C1731, C14.-32)-0133 qvex .the second band; 111,-317p Gle*.27
C1-28) C1-290 C1O over the third band t Over all bands
a neon lamp,HA6.4 is connected in parallel with the
14a fr6queilley amplifier grid' circuit in the antenna boxt,
Alth the :function :switch in ,t1141 and 1/ A 1r positions one end
of the circuit'couplin3 coils is connected to the non
directional antenna t4rough,a,awitch 131-3 and an isolating
caDacit6r C1.370, With the fiction switch in "C" position
the Antenna 'Circuit is connected to the variometer stator
of the,manual,zero sha...rpening control, while a capacitor
-C1-25 that isan equivalent of the antenna and antenna
is ,connected to the antenna tank circuit It
,serves to prevent the tank circuit :from detuning when
antenna is. disconnected from It
The capacitors C1-32 and Ci 35 are thermocompensat-,
'
g capacitors.
A hi
frequency circuit serves as a high frequency
amplifi r_load,. A couplin2; coil tuned to a frequency below
-tte:lome_st frequency of respective band is connected to the
amplifiers plate circuIt .ai2d a timed circuit - to the mixer
-3#d :circuit. The coupling, between them is inductive
-
capacitive
for balancin3. the frequency characteristic, The
hig fre4uency-amplifier circuit includes: a variable
Capacitor Cl"--1.1A-v . 'inductances, trimmers, fixed capacitorse
vaiable-caci,t6r Which is a section of the variable
seiibiy -a couplima capacitor C1-59 are
connected in--all,:band,4 other' 0.ement3 are switched by
a,,ban'dselector sia?11.t.e:i when changinlz over from one band
anothe, oils 'LL!--29, Li 32 and capacitors C1-58, C1-66f
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2')
atkid?
C1m.67p Cl 68 are switched on over the first band;
coils L1-28, Lb...31 and capoxitoTs Cluu57p C10-.63; C1w64-
C1.0-65 rover the r3econd band and coils L1-27$. L10..430 and
capacitors Cl-,456, C1--p61, C1-962, C1-69 and C1-'70 over
the third bwrida Capacitors C1w.t65 and C1-66 serve for
thormecompeAsationo
High,wfroquoney amplifl.er valve is fed through the
filter cells: tho plate is supplied throuh a resist-
or R1-4,32 blocked by caoacitor Cl-v71? the screen grid
through a rehthitor R1-:31 blocked by a capacitor 01-39a,,1
The amplifier ethode circuit includes: a
rejector 1,1,-200 C1-40, n resistor R10-28 determining
initial bias, and variable resistors R1-029 and R1-:30a
blocked by a cq,.0acitor C1.-0396t The resistor R1-29
serves to adjust receiver sain in three modes of operation its sCrew-drver operated control being brought
out to the receiver front panel and marked RECEIVU GAIN
( YeMA UM )6 T11 resistor R16-30a serves as a manual
gain control in "A" and ite't modes of operation, its
shaft being broutout to the front panel and used as
a :volume control. Securod to the same sbAit is 1,
variable resistor R10d (in the 2i1-16 valve cathode)
which serves as volume control in "&cf mode of operationo,
A rejector consisti:ag T.1.: a coil I/1-20 ;:tnd
capacitor C1-40 serves to inc:rease intermediate frequency
selectivity, which i provided by cathode current
negative food-back o..? t'qe high-ifrequency amplifier valve4
(b) The first heterodylie (A1.ft.6)0
The first heterodyne uses a 61(3 valve in an
inductiveeoluolodcircuito The heterodyne circuit
ctrnsists of coils a variable capacitor, trimmersf
compenSation capacitors tracking capacitors and coup
-ling capacitor A variable capacitor C1,-111? and a
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23
grat
totipZing capacitor 01-55 :are fixed for all bands; other
'elements included ,into the circuit are switched 07072 from
one band to another by a band .selector switch o Over the
first :band coils L123, L1-26, capacitors C1-47, C1-48t,
C1-49:f C12 are switched on; over the second band-
coils I1l22 L-7_-25?and'eapacitors C1-442,:C1-45; CI-467
.C1,-501 Cl '51 are; 'OV OT the third band coils Ll 21, L1-24
eapacitoxsC14i Ci 42p Clu-43 and C1-54 are Plate
yoltage to the heterodyne is supplied through a decoupling
bell'Ii1-35 and 11-7B
and a high -fregnency choke L134
.A useful load'ill-tite. heterodyne plate circuit isa
'choke L1-33 connected In Daroalel with a capacitor Ci 74
from whiCh high frequency voltage is fed to the mixer
:(-4,rid?through a cotTliwz caDacitor C1-790 Elements used in
the hetei6dyne circuit (r2.alf inductdx.s2 fixed and
variable capacitor's) have a positive tempeTature coefficient
vIth:the reoult that the circuit tuning ;.requency will
decrease as ambient 'temperature inc-zeases if no measures
:wce-taken6-To avoid tilis,thermocomensating capaci,ors
whose capacitance decreases s temperature increases are
connectad into Ithe'high .-09frequency and heterodyne circuitsl,v
In the heterodyne circuit capacitors Cl-,44
compensating capacitors of this type*
(c) The mixex
The mixer liseS a GM valve operating as a single
C1-47 are
arid converter
DC 4 negative voltagil la fed to the
control from a resiotor R1-3B
bloed by a capacitor C1726
cOnnected i4to-the, ,cathode circuit The mixer plate
voltage i*pupplied,thI'oligh a, resistor R1-39 blocked by a
and the circuit winding of intormediate
c4pacitor. GI
.1.a?equericv fflt.Y.e I. a4y0 filter l is a mi:xer load o It
?
consists of two circuits tuned to intermediate frequency
,8
ntelvonneOted by meas of a capacioro The first
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filter circuit i$ formed by a coil LI.^35 and a
capacitor C10-076 connected into the convertez. plate
'circulto The second circuit cortsists of a coil L1-06
and a capacitox C1*-77 Find is coupled to the first collpitnn
irs
capacitor C14-000
To, reduce noise duing unmodulated signal recap
--
tion it is desirable to employ a naTavower pass band o'
the receivez. this purpose, a crystal filter is
inserted into intermediate frequency filter 16 The
crystal filter consists of a crystal a trimmor
a coupling caoActtor C1-81 and capacitors C1--79 and
which serve to c:A:mensate for detuning of the
circuit of T,F0 filter 1 when the crystal is witched
Off o Reoft.stors Rin482 and R1-.83 shunting the plate arid
grid circuits off Alter I are connected into the
crystal filter circuit, Meoe resistors reduce the
dotuniar, effect of -4'
do
c.? n
filter bands
above circuits on the Orystal
Intermediate frequency voltage from the 8econd
circuit 01'1%F. ftlte3? I is supplied to the first
v
interthedlate fri3quency amplifier:iid
(d) The first i-atemediate frequpncy amplit.er
r.tagcT ( 311.-T8 ).
Th c Intermediate frequency amplifier stage
uses a 6K3 7alve6 Th.) valve cathode is connected through
a re8istor i42 d ete:Liiin1ne initial b1a8 and blocked
by a camcitol, Clnap to the receiver manual gain
coitTol circuit by means
variable resistors R129
and 11130a acro whichadintional bias to clevelonedk
The valve p-JAto Li supplied through a decoup1in2; cell
formed by :1, 1'0813tor RI-44 and a capacitor G1-$3B
and through the plate circuit coil o-i* intermedia[;
freque-;ac;if filter 114 !LI amplifier load is intermediate
frequency filter II-includirg two circuits, The fia:st
filter circuit consists of a coil L1-37 and a
capcitor whereas the soc.ondv of a coil 1,1-)8 ana
6
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e.iro
a capacitor Clw.850 The circuits aro coupled with each
other by a coupling capacitor CI-86. Intermediate
frequency voltage from intermediate frequeucy filter
is fed to the second into2mediate frequency amplifier
grid
ii
(e) The second intermediate frequency ampUfter
L.0-9) Et
The second intermediate frequency amplifier stage
employs a 6E3 valve The val-73 cathode is connected
through a resistor R1-46 blocked by a capacitor Cl87a
to the veociveT manual gain control circuit. The valve
plate is supplied through the decoupling ei1 consisting
of a resistor R1-48 and capacitor Cl-,886 and through
the plate circuit coil of intermediate frevency fi1te7eIlI
An amplifier load is formed by intermediate frequency
filter III including two circuits The first Mter
circu1L, consists of a coil L1-39 and a ca-oacitor CI-89
while the second of a coil Li 40 wad a capacitor C1.-900,
The circuits are connected with each other by a col_zpling
capacitor C1-91 The second filter circuit ..joods
intemediate frequency voltagG to the detector Simultano
ously, voltage from the intermediate frequency amlifier
Iralve plate ia supplied to
automatic gain control
(f) The detector
stage (311-10)4
The detector
6x6 valve
The detector
circuit and one of
purpose, Resistors
k,ao detector plate of the
and automatic gain control
and automatic gain control stage use a
in tho receiver employs a diode dixec:tor
the 6x6 valve diodes is used for this
R1.-.509 R1-,51 and R1,-5 foTra a detector load,
Detected voltage from the portion of the load 11:-.151a
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ot!
?
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26
-"I".????AAA.AANA
"IA
1
and R1 52 is fed to the loww,f:voquency cv.uplifier grif!
through a resistor R1-*49 and an isolating ea acitor CI
96
The second 66 diode serves as an automatic
detectora The automatic gain control uses a delay circuit
based on resistors R1-57 and R18 blocked by a capacitor
(!on-uxv.i.
01-88B. A resistor R1-60 18 a load of -Lac: autom lc
control stago The valve grcis elc: the high-mfTequellcy
amp:Li fi es I and II0 and intermediat4J frequeney amp ,,,,e
_,........,.,e...
tf?
axe supplled with control voltage from the load through P
common decoupling coil R1-619 C1-100a aftd decoupli
cells 111-271 C1,--:39B and al-440p C1=-78a C1-73
C 87 B C1-87 O respcct:1xolye
(g) The low .(:;:equericy ami)ltfte
The iow-froquene amDlifie uscL: ono
valve triode, Tho, .inolifier load is a To3isto:c
which low-luequilcy voltage is suppled to tho amp1ifjo-2
input circuit of the t 1113hono and dixoc:tion finder OU;;37,CC6
The valve plate is blockeld ''or high i.,eque-Acy a erTaialt-
or C1-102.
(ii) Ti telephone, output amplifieT 01140A
The teleDhono output amplific employs a
(11' 1-))
xt?
c.7
C.)
p A r".?
)
t
/- t
t-416
Tho voltage from the low-foqueAcy amplifier load R:1,64 is
upplied to the telephone output amplifier valve
through an J.solatins capacitor C1-1080 Tho valve scree:a
I3 ?f3upp1I.ed directly from the suDlOv cLecuits while the
plate is Led th-r.touLh the Driniary windi-lw, of the tranforier
included into the tTansformer mit
,*
The t,
es-,1 non cc,
are comiected to a part of the ta7ansfol)me.J.- primary winirp;
through an icolatinc capacitor 01.-123; the tmasfoximer
secondary wiading is loaded by a ci;,,Fp..,\Inic, loudspealcoT4 In
addition to a. fixed rosistoa:' R1-78 (blocked by an
electrolytic' capacitor C1-115) across which grid bias Jo
developed U variable :re3lator 111-430 6t
acros8
a6ditiona1 bias is obtained to enable volume control
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e>7
connected to the cathode circuit with the function switch
in "An position The 3haf1; of th...1.3 resistor is brought out
to the receiver front panel as a knob VOLUMB lipt-vmyr v-,m
) The second heterodne ( Al -11),
The .5ecor 'Let./ -4 n '1'4"
d j-r ??.-. ? -.4 r 1*.
- 0,, .0
? 1,4 v C 144.11 valve -I -0 a
?
wi.tb, inductive coupling nn
consists of coils LI
P.C1C1'0110 12t.--,
0 -kir
r,oeiP
...I ? 4 ? 4
L.. J. -0 f. " ? '
41 aild 1.1-442 oapa:QP C7
? C ac,-0cl,
d a semi- el. 4,varibi , . 1-' r
a:
D
Joitage to the hotel-odyne valve is myrOied
-
s' R
resiL7,1,o1.
)3 whic
.440,
)
101 C.. A 5 [10 -iLle same TaIne
The voltage geno:rated by the second litorodyno i taken
0 /11 this load t 10.0P r,.1) n coupling CZP a ? NI
01
eteotor plate.
( -.4) The tuning indicator an-pi:I.:at:at ( ja-12,
The tuning indicator sup2I3 stc-4E7,-(.1 1.1F;(33 one
of the
which
Ti C
0
?Arvne:4 'PrO-
t)
milli=meter;
&J.-Y.11
'
in'diCat07:
:peeoivel- turlink.) conneetod to
c
the cathode cii'cuits The couLrol valve grid is fed. viith DU
voltage (from a portion of
"
a resisto
t.,n
:71?4.4,0"Ne4
or RI??? -52 10:?..(1 thiouh
,
0 "OD (Fr L ..t ,r,, t.t.
to 1..1/ JC componcnt
.1 es
leo'
the deteetox load mo novi..de more operation a
s
capac*I-1;or G1-103 is connected o-etweell thQ txrid and the
-cathodeo.Z the valve
The Dimetion
.0.!4.1.1
The direction finder outo t amlifier used
rf
theuo v
r. f. "?o' ? )-1 4ti'' "1 4- ;?:1
1
valve et If '441iffreque-mcy
L.) ,71 stage
cont:col valve grid from tho low-frt)quency amplifier load
.
through an i3 canacitor C -104 and a phaing coil
R1-66, C1-1W7 C1-106 Due to this cell that audio volto4z
pha3e is outained which is necessary for coITect operatioli
of the control
chaxacteristics some-a
31:!-:ultanoously9 110i3O-P%-j).X00"1:
hat n c bec o o 1. ta."-es if hifi1.er
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1")r%
o.4) 40 ""...4
frequencies will be clipped due to this cinluito Th
direction finder output amplifier operates as a
froguency amplifier. The valve in fed as follows:
the plate is 3upnlioi through a decoupling cell R169
C1-1.07B and the transfoTmer prima:mi. winding piith grid through the same decumling cell and a
damping re3i8tor n1-68 blocked by a capacitor Ca-107Cir
A resistor RI 67 :La co:cineeted to the cathode circul
blocked by an el,.)cteolvtic capacitor C1-109 Fixed
is developed In this cl_rcuit. The stage 'Ls loaded by the
transformer Tp14, the secon6ary of which is tuaed to
the audio oscillator frequacy by capacitoro C1-310
Cl lilt Ci -112.4 and CI -113 Vroi , T-
j ? 4ripzPr1rn%;
13econda.17 amplified local modulation frequency volt-
fed to the control ciTTuit
amplitud,
vz'ave d
4V?A +.40 same
(7) The ?,,utomatic contxol circuit of the 3ea-och
600 0043024/4.44f 4*44:14p,000.1414.4s451/4100,p0:144',1304,4 f.
c'oil rotation (control cixcult)?,
t'r e 4 te 0 0 0 4i e 0 0 0 e 4 4- 0
The ccmtx(l elia.c'ol..t elif:)lowi two plate detectorza,
_ .
based on U60.
valvast and a balani2ing brAze with
magnetic amDlifiers (1!i '). :elate voltage 13 supplied
. 4.,0?;
the pate detectors through a filter consisting of a .1.-
'-?
frequency choke (7P1-3)0 an electrolytic cal3acitol. el 114
,,, ,
end chokea with saturated cores Tp1-21 Tn1 3 Voltages of
. I, . erz
tho same amplitude. but 1800 out of phase are suwolied to
the vc,Ive screen grit1.3 A-om tho audio oscillator, FL,ced,
bias is supplied to tho valve control grids through a
:resistor RI
72
blockod by a capancitor C1407us This bi_
Is taken 'from resioton Ti1-73 andEl-J7A2 the resistor
,e
R1-74 being a va2Aab3.e resistor, With a positive half.
,)eriod of audio voTtage appliod to the screen grid of one
of the control vctivos and with a positive half-Period of
local modulation voltage across its control uld thio
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..valve becomes conducting and current flows through it3
The plate circuit of the control valves includes magnetic
amp1ifier8 TD1-27 Tp1-3, which allow alternating current
of considerable power to be controlled with the help of
small dttect currentse The magnetic amplifier is a special
&_elf-4inductanca c with a core made out of magnetic
.material characterizb-d by quick saturation,, Thus, even
..with a small direct :current flow through Tp1-2 transformer
winding 1-2; self-inductance of winding 3-4 decreases
:sharply 4 Windings 3,44 of the both magnetic amplifiers
'together with Tp3-3 transformer v:inding 3-4-5 (in the
-suoly unit) form a .bride A capacitor C1-121, winding 31
of a motor APNr627 rOtating the goniometer search coil
together with the bearihg indicator are connected to the
bridge diagonal A000 voltages betwegn points 3 r 4 and
5 - 4 Of the Tp3-3 transformer winding are equal in
magnitude and are shifted by 1800 in phase; that is why
with tho awe, psEatroinductances of windings 3-4 of the
both magnetic awlifiem; currens, equal in magnitude
but opposite in phase; flow through the -bridge arms andl
consequently, Current does not flow through motor wind
ing 314.14 If one of those resistances decreases, the bridge
balance will be disturbed and current will flow through
the motor winding,
As soon as local modulation voltage is applied
to the control grids of the control valves (due to deflec-
tion of-the search coil from the bearing position) the
plate current will increase because of the phase
aoinc7dence of the grid. and screen voltages in the
circuit of'one of the control valves ( ).'This leads
to magnetic saturation of thp172 transf6rmer core and
'thlisto'-reduc'ed inductive resistailce of winding
t,histransformer, Hence,. the bridge balance will *be:
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diturbed, curront will tart to flow through motor wind-
,ing.:14'the'r4orotor will begin rotating and drive the
earch-coilv
411-627 moor i3 an A,Ce two-phase induetloa motorv
It has-:two:windings l nd. 204.2 which when supplied with
current vX-thci, same 'frequency having a phase shift
appokimating +90o0 set up a rotating magnetic field caus,9
ingthe motor rotor to rotate
It a:supply cuxrent phase shift approximating -.90?
the direction of magnetic field :rotation becomes opposite
to that in the previous case and the motor rotor begins
rotating in the opposite directiono Besides alternating
current retardation direct current flows through UK
motor winding 3uftl. This current sets up a Permanent
magnettc field rota):ding rotation of the motor rot014Q To
obtain currents with phase shift near 900 in motor
windings 2-.4 and 3-1, caimcitora C3-1), C3-14p C3-1-15 are
connected to winding ci.frocuit 2-4 and a capacitor C1-121,
to winding circuit .3-1. The latter capacitor is simultane-
ously an isolating capacitor for the direct component in
motor winding 3-10
Thus, motor winding 3-1 is a control winding whose
current value and phase are determined by a search coil
position relative to a bearing direction Supply of motor
winding 2,-4 is constant and independent of a search coil
position. With t4e search coil in the bearing position
voltage of local modulation signal frequency is not
uppliod to the control grids. In the valve plate
cia:cuits and consequently, in primaries 1-2 of the
magnetic amplifiers Tp1-2 and Tril-.31 small currents,
equal in magnitude, flow since large bias is constantly
supplied to both valvos (for ba1!4ncing the circuit a
variable resistor R1-75 is connected into the cathodes
of
co
fo
va
se
ac
th
Cu
mo
CO
be
si
of
yd.
air
vc
f:
ti
S.
-b
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31
of the both control valvest its screw,-driver operated
control being arranged on the side wall of the chassis
for adjusting the circuit aftex replacement of control
valvas), The self?inductanceu of magnetic amplifier
secondaries 34 are equal and large in magnituAle which
accounts for small and equal cu outs that flow through
them. As those currents are shifted by 180? in phase
current does not flow through motor winding 3-1 the
motor rotor does not rQtate, and the goniometer search
coil is inoperative
When the search coil deflects to one side from the
bearing position) low-Pfreguoney voltage of the local
signal modulation is applied to the control 94.ids. One
of the control valve" begin5 conducting and large current
V(111 flow through its plate circuit and magnetic
amplifier primary 1-2 while the other control valve is
cut off by a negative half--lave
voltage applied to its screen
flow through its plate circuit.
of the audio oscillatox
rid and current does not
Laxe current
through one of transformer 7yrimazy winding3
sharp reducing of the secondary winding (3-4)
' loads to
self
inductancet the bridge circuit will be no loner
balanced as the secondary winding (>-4) self-inductance
of the magnetic amplifier of the inoperative valve 3omain8
considerable. As the result the difference current which
is in phase with the current in magnetic amplifier wind?
,
ing 3-.4 of the conducting valve (current phase in magnetic
amplifier winding 34 of the inoperative valve is shifted
by 1800) will start to flow in motor winding 1?is rotating
the motor rot or thus turning th-.) saarch coil in the direcc-
tion of the bearing position With the search coil displaced
to the other sido from tho bearing .position the local modula?
tion frequency voltal3 shifted by 1800 is tipflied to the
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cl,ntrol vlve rid causince!, current to flow through the
plate circuit of another control valve. As the re8ulto
the motor rotates in the other direction bringing the
search coil again in the bearia position. The control
circuit operates only with the function switch in "A9
position. With this switch in "C" position (Fig,8) motor
control winding 3,44 is supiplied, only through a switch
In this case motor control winding 3l is connected to
the ends of Tp)r-i transformer winding J4 5 through
resistors Ri-P0 and R1-81 oa? R1-01,
Valve arrangement
unit it.; shown in Fig .9*
in the roceivez and-coniomoter
(c) Su-pply Unit
41.4.0
The supply unit consists of a power transformer
three selenium rectifiers (;TE1-1. A3-2 and 4,3 3
400 c.pqs. driver ( A3-1) .41-1et a power amplifier
3133) 3
Voltage from the power supply (A,C, ship mains, 127 V
or A.C, voltage from the converter OH-120 ) is fed
through the distribution board to the power transformer
primary. The primary taps correspond to voltages applied:
100; 1102 127 and 140 V,
At 220 V A.C. the apnaratus is connected through the
autotransformerp 220/127 V.
To convert A.C, voltage into D$C, voltaga selenium
-rectifiers are used. The 210 V rectifier
9 0
uses four selenium piles A3C-35-16; each of thorn includes
two legs of a single-phase bridze circuit. The rectifiers
employ two bridges connected in series. D4C, voltages taken
from each of the two bridges are added, Voltage to the
bridges are taken from TO-1 transformer windings 1 5 or
t
0 E
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33 0.4:14
2-76* Rectifier voltage is applied to the receiver-and-
goniometer unit through-a*mid-shunt filter formed by a
low-frequency choke ( 3p3-1) and two capacitors 'C',3 4v
C3-5*
Voltage 100 Vt is taken from on of the bridges
and through the three-section mid-shunt filter is applied
to the receiver-and-goniometex, unite The firot fi1te3 sec-
tion consists of a choke Ap
3
and capacitors C3-6.,
C3-7; the second section - of a c:1-lake Z1) 3-4 ant a
capacitor C3-8; and the third - of chokes j1,D
L32
L3-2 and capacitors C)-la C:3-1B C32, C3-3,
Rectified voltage5 210 Vt is Rpplied to th::a
rece ver-and-goniometer unit to supply the phasing
commutator valves, loop amplifier control circuit va1ver
and audio oscillator as well as to feed the Dower ampli-
fier valves in the supply unit,
Rectified voltat;e, 100 is fed to supply the
rest of the receiver and goniometer unit and supply unit
valves
The retarding voltae J:ectifier ( 43-1) employs a
selenium pile ABC-35-'17 designed as a single-phase bridge
circuit4
Retarding vatage is supplied to the ..veceiver-and-
ganiometer unit through a choke An3-5
Power -GransformEr windiAg 17
the supply unit valve f'jlamcnts?b
Power transfolimer winding 4-8 serves to
receiver-eand-goniomcter valve filaments.
-Power transformer tAps 89 and 4-9 supply lamps
d for brightanin,
The AC 0 convertor of 400 cp*34
16 serves to supply
11
supply the
decic-ned for
supplying the mato:I:, APX-627 consists of a push-Dull
oscillator employing a 080 valve and power amplifier
which uses two 6E6 C valves in a push-pull circuit.
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The tuzed transfoxmer TO 2 determine" driver
frequency Transformer primary 1-'02-.3 is connected to
the driver valve plates, whereas it$ mid-point is
supplied with the driver .plate voltage. EncL 4 and 6 of
transformer secondary 4-50q6 are connected to the control
grids of the 400 coos. oscillator power amplifier
uhrou
resistors 130-6 and R:3-7. The mid-.Doint of the
secondary is connected via a rE:siotor P30-5 to a
variable resistor R1 74 arranged in the rocolver r)-11.d-
goniometer unit casing compartment from which biaa
voltage is taken to the control valve control gridse:
primary is tuned to generated frequency, 400
a capacitor 0-49.
The plates of the oscillator supplying the motor
are loaded by an output transformer Tp)--.3 Fix(16 moto:t!
winding (2-.4) is supplied from transformer ,.. ? ,
through phasing capacitors C1-13p C1-14,
the movable motor winding (3-l) from trans ul4mor Ihrti
ing through the contro1 circuitt)
J-114.1
by
4 1.
(d) Control Distribution Board
'Few vrea4k lags Porp
es,* 12.46. ICWO 4:417!
4,)
The control-distribution board serves to switc on
the direction findels and to monitor voltages suppli
from the ship mains and su'iply unit to the receivr310-
goniometex unito
Voltage in the coatrol-dstlibution hoard is monitored
by means of a D,C, voltmet()r (11"=) and an A.C, voltmeter
( V ta:41) and a switch VOLTAG 1OUTTORI1\rG, ( KOHTFOiE HADP2
KEHR) 132 m14 Thi$ switch ma4):06 it possible to moult or the
following voltages:
The D4C. ship mains*
The A,C4, network and outut of conveTtPr
Plate voltage 210 VO
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Cl
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Plate voltage 100 Vo
Retardation voltage.
Voltage, 400 coeflz
Besidesthe board is provided with
P
voltage switch to adjust direction finder
a real ship mains voltage maznituda, This
an A, C, network
enelTizing to
switch supplies
ship mains voltage to diffexent taps of the power
transformer primary, Thus? the direction finder can
aormally operate at ship mains voltages of 100 to 140 V
instead of rateC, 127 V, The D.C. ship mains is connected
to the converter 011-120 or the network AC
the autotransfoTmer 220/127 V by means of a tumbler
switch SHIP MAIMS 1.)(% 110 220 A4C. 220 (EOPTCETL-
220 "." 220).
Resistor R24, shown in Coe lagramp serves to
to
broaden D.C., voltmeter measurement range,, Capacitors C21
and C22 oerve for blocking the ship mains A resistor
R2-2 serves to align tho instrument readingn,
2. Circuit Operation at Antenna ivc:ception
(with the function switch in HA if position)
As it was noted above at antenna reception the
direction finder operates as a conventional superhete-3
rodyne receiver. At the reception of an unmedulated
signal the second heterodyne is '.'xitched on in 4.1
r ceiver.
3 0
C
'cult L1)erHAion at Aural Direction
???
0
,
FiRding (with n l
o unction switch in
IT" position)
At loop antenna roc.eption which takes place with
the function switch in 11C" position R.D,F, APH-50
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?
.04e.
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-36-,
operates as an aural direction finder4 In this casog the
switch disconnects the antenna irom the antenna tank
circuit and connects it to the manual antenna effect
compensation variometer (zero cleaning) and a capacittp
or 01-257 equivalent to the antenna and antenna leadvzin
capacitance, is connected to the antonne4 eircu to
Simultaneously the owitch cuts in the plate supply
circuit of the phasing commutator valves and loop
amplifier One of the phasing commutator valvas is cut
off by large bias voltage applied to the control grido
In this case, the phasing commutator operates as a
conventional highw?frequency amplifier and serves to
amplify signals received by the loop antenna unit
A signal received by the loop antonna unit, amplified
by the phasing commutator and loop amplifier is -Ped to
the :receiver input. In the receiver the sinal is
amplified again converted detected and fed to the
telephone and dynamic loudseaker.
Furthemore, with the function switch in "C" 1)osic,
tion the circuit which provides the manual rotation of
the goniometer sec:a-eh coil is switched on
To control manual rotation of the search coup
*witch B1-6 SEARCH COIL ROTATD:M (11PAIIIEHE KKATEXE)
is used which connects the motor winding (3-sl) to au;
of the'Tp3043 transformer legs (56-4 or 3-4 of winding
5-4-3)0 As voltage phases in the TO-$3 transformer
legs 5-4 and 3-4 differ by 180?1 current phases in the
motor winding (3-1) will differ by 1800 as well and,
consequently, the motor rotor will assume Tight-hand
or left-hand Totatione In this way the search coil
rotation is controlled manuall4y4 Uhon turning the
switch knob to the Tight or to the loft as far as it
will go'contacts 3 and 4 or 2 and 3 (See Fig 8) are
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?36?
aperates as an aural direction finder. In this caBog the
switch disconnects the antenna from the antenna tank
circuit and connects it to the manual antennae-Xrect
compensation variometer (zero cleaning) and a capacitm,
or C/-25p equivalent to the antenna and antenna lea din
capacitance, is connected to the antonna
Simultaneously" the oveLtch cuts in the plate oupply
circuit of the phasing commutator valves and loop
amplifier, One of the phasing commutator valves is c0
off by large bias voltage applied to the control gridc4
In this case the phasing commutator operates as a
conventional high.ftfrequency amplifier and serves to
amplify signals received by the loop antenna unit
A signal received by the loop antenna unit, amplified
by the phasing commutator and loop amplifier is fed to
the receiver input. In the receiver the signal is
amplified again converted detected and fed to the
telephone and dynamic loudspeaker.
Furthemoret with the function switch in "C" posico?
tion the circuit which provides the manual rotation of
the goniometer search coil is switched on.
To control manual rotation
switch B1-6 SEARCH COIL EOTATION
is used which connects the motor
of the'Tp3-03 transformer legs (5
5.--4-3)0 As voltage phases in the
legs 5-4 and 3-4 differ by 180?,
of the search coil9
(BRWEHEE ENATERH)
windin (3-1) to on
4 or 3-4 of winding
Tp3-13 transformer
current phases in 1,ho
motor winding (34) will differ by 1800 as well andg
consequently., the motor rotor will assume right?hand
or left?hand rotation. In this way the search coil
rotation is controlled manually /hon turning the
switch knob to the right or to the left as far as it
will gofcontacts 3 and 4 or 2 and 3 (See Fig,8) are
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ciosedo
Wies
curfent
motor rt
rotate
or
close II'
the res:
oi:euit
the sea:
at grea
12
tion by
In this
the pha
and car
111-13
molt
bias r(
3uffic:
Phasini
voltagE
antenlla
circuit
les8
e
st
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37
closed This connects two resistors R180 and R1-81 in
series with the motor winding circuit reducing the
current in the winding to a low value and causing the
motor rotor aletd# consequently the search coll to
rotate slowly. If the switch B1-6 is turned to the righ
or to the left, as far as it will go, contacts 2 and
close with 1 or 3 and 4 with 51 thus shot-.-circuiting
the resistor R1-80 and increasing current in motor
circuit 1-03 which causes the rotor and, consequently
the search coil to :rotate to the right or to the left
at greater speed than in tho first case6
4. Circuit Operation at Automatic Direction
Yind'ing (with the function switch in N.Pv
12,opl4on)
In automatic direction finding simultaneous recep?
tion by the loop and non?directiona antennas takes places
In this case the switoh 'cuts in the circuit supplying
the phasing commutator, loop amplifierp audio oscillator
and control valvess
Furthermore the switch connects a leak resistance
RI-13 in the control grid circuit of one phasing
commutator valve to the unit body with tho result that
bias resistance values in both vE0ve3 become equal and
sufficient to facilitate cutting off and ooening of the
phasing commutator valves by AsC. audio oscillator
voltage fed to the phasing commutator grids*.
Simultaneously, the switch connects the non?directional
antenna to the antenna tank circuit and shunts the loop
circuit by a resistor R1-18 to make the direction finder
less sensitive to some dotunings in the loop circuit
which cannot be excluded during operations
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IA this :Mode of operation the control grids of the
phasing commutator valve's are supplied with a signal from
the 2.66p input and A.C. Voltage from the audio oacillatort
the latter ensures periodic 180??-phase shift of the signal
rvolta& across the loop amplifier grid every half-period
of 1ow.11;equenc'y
This ,voltage, amplified by the loop amplifier is
fed to, the antenna tank circuit where it is added to a
'nont;ftdirectional antenna signal. Thu sg the resulting
voltage across the high-frequency amplifier grid appears
MOUlated by audio oscillator gommutating frequency, An
envelope phase of this amplitude-modulated oscillation at
'the receiver input shifts by 1800 deDending on the side
the shilydeflects to with relation to the transmitter
,directian.- Modulation depth depends upon an angle of
rotation of the ship from the transmitter direction. Tho
amplified signal passes the receiver where it is detected
and Is fed to, the direction finder output aMplifier gride
The transformer Tpll tuned to audio oscilfator frequency
is _gonnected to the valve plate 4rcuit of this stage
It discriminates the voltage of local modulation
'frequency from ,the signal. This voltage is supplied in
phaae, to the control valve grids. Magnetic amplifiers
,are connected into the control valve plate circuits.
These amplifiers :are the balance bridge legs in the
diaganal of which control winding 3-1 of the motor driving
the search coil is connected The control circuit has boon
,diScussed above.
Automatic 'compensation of the antenna effect 13
provided by:capaaitive coupling of the compensating wire
'of the 'twowire 'non-directional antenna with the field
coils,
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39
aeration of the Tuning Indicator Circuit
at Signal Reception
? Direction finder Is tuned according to the tuning
indicator The tuning indicator is connected into the
cathode circuit of the H1-12 valve Bias is applied to
the control valve grid from the detector load w With the
direction finder tuned 'finely9 maximum voltage is developed
across the load which corresponds to the maximum negative
bias applied to the tuning indicator valve which in its
turn is related to minimum plate current in the right hand
triode of the J11-12 valve.
-
The indicator pointer is at the extreme rightmhand
position when the apparatus is off The maximum current
position corresponds to the extreme left-hand deflection
of the pointer
Thus; rotating the tunine; knob until the tuning
indicator :i)ointe'r deflection is maximal (right-hand
deflection) the position corresponding to the minimum
current flowing in the tuning indicator valve cathode
circuit is found? i.e exact tuning of the direction
finder to the transmitter frequency is achieved
The more the indicator pointer deflection to the
ist the larger is the signal value0
69 Circuit Operation at Modulated and
"...1ght
Unmodulated Oscillation Recelltion
Thp.directiOn finder .ma?7:es it possible to receive
Jnodulated-and unmodulated Biinalso To listen to
lznmoduI'ated 'signal a switch TEMPHONE-TELEGRAPH (TAO-TXr)
?is 'set .in a TELEGRAPH TIP ? Dosition* In this case-the
seCon4 hete'redyno.c'athode,circuit is grounded and it
arts_generaftn. Due to the f5econd heterodyne, the
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frequency of the unmodulated signal is converted in the
detector into audio frequency which i8 heard at the out-
putt When TAP is switched on automatic gain contTol
IS made inoperative. To align a beat note the second
heterodyne trimmer shaft is brought out to the direction
finder front panel.
In "A. mode of operation the second heterodyne does
not operate and only modulated signals are audible
VI. BRIEF DESCRIPTION OF PARTS Va INDIVIDUAL
UNITS OF DIRECTION FINDER
The dipection finder reolves itself into parts
enumerated in Section IV of this Description.
I, Receiver-And-GTaiomoter Unit
The receiver-and-goniometer unit is
made sida3h.i.
proof. All cables led to the unit rLre ::-eceived through
glands and the control knobs brought out to tho front
panel are provided with gaskets. The eablo let.Lds are
A
fanned out in respective casing coffoartments on sDecial
distribution terminal blocksA, By means of thc; cable plui!
connectors the casing is coupled to the chassis, The
chassis includes separate screened compartmonts for
wiring different high:6-freciti one y stages of the d iTOC ti on
finder . This is found necessary in order to decrease
random couplings between the stage to which the receiver
self-excitation and direction i:inding errors may be
attributable. Provision of both secttono of the variable
capacitor assembly of tho loop circuit with isolAtod
axles serves the same purpose. The upper part of the
chassis houses all the high-frequoAcy circuits;
intermediate-frequency circuits transformer units;
Oriable
Vider
ii thc
br3vg
61gq
0410.5at
03?
n-;
1a,ve
:23ad:;USi
[j4.45,11113.
6
,
I
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variable capacitor assemb1y0 goniometTrvalves) etc4
The under side of the chassis houses the wiring and
in the mai:11p all the blocking capacitors. All control
are brought out to the direction ffinder front panel with
the exception o:r! the automatic antoilna effect compenaa
tion trimmer) coupling capacitance switch of ilho
compensating wire (arranc:;ed in the antenna comartmeAie
of the casing); regulator (screw-driver operated) of
control circuit senaitivity (1ocate41 in the crit3i-v- powe
compartment), radio deviation compensation clioes; whi-ch
,
01-e located lorITN comi)artont of
", cwAns
balance regulatoa? (screw-driver (J)erazed) of the control
circuit located on the left ii(Ac3 wall of tho ch7-u7331.54
The direction finder front panel bears:
1 Tvopairs of telephone jacks it,A.J.,.oc
PHONE and DYNALIC
1-101_,Ti.).t.' \.1% -a111-15 /3 ? Tr)
-t
T-1and r r \
2. Tumbler switch TN-TAP (PHoN7 .ULEGR:LPH)
34 Volume control marked VOLUM (PPMEOCTL)
(R1v-30a and R1-306 )
4 Ad iscrew-ng screw RECEIVER
*
G.NT-r(%.elp ;11tono)
- -
T
e I
for adjusting the receiver jaIn (c)c.-0,-Aw-dal.iver O) ated
5
Adjusting
sorow MODIMATION DEPT'J (PHYB:10V-11 )
Lor adju3ting modulation fact or (screw-driver
Ri 24,
a
Tuning. knob.
Band selactov switch (J31,-2).
Function
switch 11,11" nA" nr
4,
i
onts--.1-ateu)
9. Zero sharpening control markea fftERO SHARPENING
(HOMEHCATOP PA3MLiTOCTI4).
10. Knob BA AT NOTE (TOR EVIEHn)
11,$ Knob SEARCH COIL ROTATIUN (BPAUHME KOKATEAR)
(316.06)6
12 On Off 3WitP11 CRYYLL C IMAM (31-.4)
130Knob COMB SETTIWG (ETATO-al YYPCA)
for rotating the movable goniomoter scale (B1-1)
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U7) tt
0
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
e- 42
140 Terminal GROUND (.SEM)*
15. Knob SHUTTER (3AT3OP) 2 pjecos.
Fig. 10 (a9 bt c and d) shows a gene.ral view of
the receiver-and-goniometer unit,
(a) Front panel view%
(b) Top view in the casing with the lid openo
(C) Top view with casing removodo
(d) Under side view with the casing removedo
The receiver-and-goniometer unit uses
ing valves:
Type j 6116e
~0.44..0wesods.
Quantity
3
5
MoM
0Wp
the 1.'01
6118C
Pviln
QA0V0
Let us analyse the design and principlo,o:t opera-
tion of the basic parts of the roceiver-aad-Lon,mel',r
unit,
(a) Goniometer.
The goaloweter i3 a principal part of the receiverw-
and goniometer unite, It consIrsts of two field coil; fixed
at right angle to each other and of a search coil which
rotates inside theme The goniometer is lonvided with
movable and fixed scales. Radio relative b?J.aring is :read
on the axed scale and true bearing - on the movable
scale. Gyra--conrpass angular reading al-e transmitted to
the movable goniometer scale emplcrying the Fielsyn system
through a step-down reducing &ear. To match gyroo4comparla
and movable goniometer scale readings a blob COUR3E
STPTING is provideaa
An indicator is mounted on the search coil axle
to read radio bearing and radio relative 1)earinj4
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The goniometer is made small-sized and uses a
carbonyl iron core. Its scales are made of plexiglass,
To rotate the search co1.1 a motor is provided type APR 627
The goniometer indicator is coupled to one end of the
spiral spring of the mechanieal radio deviation compensat-
ory whereas the compensator rotating disk is secured t5
the goniometer axle o (See description of the mechanical
compensator in VI,le). The goniometer scale assembly is
illuminated by means of five lamps type CM-36 arranged
circumferentially in five pointsw
(b) APH-627 motor is a motor rotating the
**00tea*00
goniometer search coil.
This motor is two-phase induction motor with a
short-circuited rotor* Motor engagement with the search
coil Is made through a step-down reducting gear4
(c) Tuning and band switching system* ,
464,64.ftegatirpo?tsta6666110t1664066vooc.66,04
The tuning system consists of a scale assembly with
a gear and a band switching system in the highmfrequency
circuits combined in a common unit, The tuning scale is
toupled to the rotor axle of the variable capacitor
assembly. A cursor is fixed in front of the tuning scale,
The scale and the cursor are covered with a blind having
three observation windows according to the number of
bands... The blind in connected with the axle passing
through the high?ofrequency circuit unit and ts fixed to
a specIA1 bracket on the receiver chassis, The blind
drive axle is brought out to the front panel of the
receiver-and-goniometer unit. When switching from one
band to another the drive axle turns simultaneously the
blind and axle which passes through band switching
plates in the circuits, thus providing switchin on'of
any band.
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The variable variable capacitor assembly rotor is rotated by
means of a toothed gear. On rotating the tuning knob
the tuning scale disk and assembly rotor begin rotating4
The direction finder tuning scale is divided into
three bands. The first band (lower) covers frequenciet.
of 187,5 Kc/s to 375 Kc/s, This band is calibrated
every 20 Kc/s. The second band (middle) covers freQuencies
of 375 Kc/s to 750 Kcis. This band is calibrated
every 50 Kc/s. The third band (upper) covers frequencies
of 270 Kc/s to 320 Kc/s calibrated every
Besides, ten index lines are plotted on the scale of the
third band marked by first ten lettorr3 of the Latin
alphabet, Each of these index lines corresponds to a
frequency at which according to the Intenational Standard
one of the beacon groups oi)erates, Altogether, there
ten such beacon groups, The index lines on the scale
correspond to the following frequenciest
A oft fz 2910 Kc/s
B f = 2940 Kc/s
= 29745 Kc/s
D f= 300,5 Kc/s
f 3036, Kc/s
306.5 Kc/s
f = 30965 Ws
H f - 312.5 Kc/s
4.?
315,5 Ke/s
f = 318.5 Ke/s
Electrical compensation of quadrantal radio deNria-
tion and mechanical compensation of residual radio devia.-,
tion are provided in tho direction finder.
(d) Electric compensation of :radio deviation.
0 4 4 0 4 0 6 4 4 * 0 0 4 4i 0f 4 t t# *4* 0 ci & b 0 4 vs 4 4 .
Three chokes are voed for electric compensation of
quadrantal radio deviationo One choke is connected in
par
of
sor
jilt
are
tio)
cho)
corn
Coq,
one
the
radi
NET
devi
radi
omp
by
dee
dire
COU
Slid
disk
Tollt
later
body
tim
th;,?
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parallel with one of the field coils (according to siga
of radio deyiation)p the other two are connected in
series with the search coil to compensate for detuning
introduced by the first choke t These compensating chokes
are calibrated in degrees of radio daviation compensa?
tion, Sign of radio deviation compensated for by the
chokes changes with the field coil the chokes are
connected. to* While connecting them to the field coil
coupled with the fore?and?aft loop, radio deviation of
one sign is compensated foi, while connecting them to
the field coil coupled with the athwartships loop,
radio deviation of the other sign is
Section VIII 3 describes how to connect the
compensating chokes to different loop antennas
To reduce direction finder errors caused by radio
deviations to zero, mechanical compensation of residual
radio deviation is provided
(e) Mechanical radio deviation compensator
49()06Of9?0 99 49 Og994 m**00, V e 9,04 90,V999i
The purpose of the mechanical radio deviation
compensator is to change the goniometer indicator position
by an angle the value of which is equal to residual (after
electric compensation) radio deviation for the
en
direction of the goniometer indicators
The mechanical compens6.tor (Fi11) is a mechanism
consisting of a rotating disk with a slide inside, The
slide can travel radially on the guide rollers along the
disk. A rdIler is coupled rigidly to the slide; this
roller MOVOS along a template body positioned on the
lateral surface inside the compensator& The template
body shape can be adjusted with 36 screws, A correc
tion scale is plotted on the disk, The compensator
mechanism functions in the following way: rotating
the 'goniometer search coil turns the disk fixed on its
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axle. When the soarohcoil turns through some angle, the
compensator disk and the indicator, provided the
temp/ate shape is roundp turn through the same ang1e4 If
the template is not round, the slide roller rolling
along the template body will have simultaneously linear
movement Due to this movement :the slide will cause a
spiral spring to rotate the indicator through some
additional angle. A value and sign of this additional
angle of rotation will deDend upon the template body
shape. Employing 36 screws the template shape -can he
adjusted in. such a way that additional change of the
indicator angle will correspond to the law of the
residual radio deviation change for the given ship. The
adjusting screws are spaced 100 apart against the
divisions corresponding to Op 20g etc degrees of
the relative bearing scale. The correction scale from 0?
to 01:5? is graduated on the disk. A correction, while
adjusting the template body shape, is read on the
correction scale with the help of the indicator
(Signs o. the ci)rrection scale show the direction
the Indicator must rotate in, when the template body
shape is being adjusted). To adjust the template body
shape it is neceosary to plot a residual radio dvia?
tion curve for the given ship and to check the radio
deviation comensator against itt
(f) The zero sharpening contro1.
&* 4, 6 4.004o*ft**46voileivir
The direction finder employs automatic zero clean
ing For this purpose a compensating antenna iG
provided in the direction finder assembly which is ono
of the wires of the two?wire non?directional antenna.
The compensating antenna ia coupled to one of the
goniometer field coil through a coupling capacitor The
current flowing in the circuit formcd by te (!om.oensat?
'r-
oll".
2.ttrit
p1
Wo
antrin
vItro:
siU
g
tris
W.Nit
fia
,r4;17:1
r414,
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47
ng alytennaf, capacitor and' field coil is opposite to the
currentto'which-blurred -or displaced minimum is
.attributable i The value of the current applied in this
way ds controlled by adjusting a value of the coupling
-capacitor and by the final tuning of the trimmer C1-.137.
,The compensating antenna has the same dimensions as
the prin4pa:4 one and is connected to the receiver-and-
goniometer unit likewise with the help of the lead-tino In
the-antenm(compartent of the casing the compensating
antenna is connected to the contact
Tk./. compensating
antenna is coupled to the automatic zero sharpening
control ,and trimmer C1*-137 through a highi-frequency choke
connected between, contacts 3 2 of the terminal stripe
Either of capacitox3C14369 C1439 Cl-1401 C1-141 can be
connected in parallel with the trimmer by means of a
switch :B1.4, These capacitors are interconnected with
the-help-of their second ends and are connected to
contact 15 in the loop compartment of the casing which
can he connected to contaets 14, 121 10 or 8 by means of
a flexible conductor in the same compartment, ie e to one
the goniometer field coils6 (The contact to which the
jumper of contact 15 is coupled is determined during
compensation),
With the function switch in C position, in addi-
tion to automatic antenna effect compensationt manual
antenna effect compensatiOn is provided by employing the
princiDal antenna and variometer. During direction findwr
ing the principal antenna is disconnected from the
receiver antenna circuit and is connected to the stator
of manual zero sharpening variometer. The rotor of this
variometer is constantly connected to the loop kiircuit
in series with the goniometer search coil. Thus, the
compensating voltage, which is in antiphase with the
'voltage which affects the sharp minimum, is fed into the
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search coil. By rotating the variometer rotors
possible to adjust the zero sharpening so that the minimum
it is
is sharp,
(gl Matching
# 4 * :# 4 wtate,teosot
dovices6
The matching devices serve to compensato for detunim
of the direction finder loop input caused by ;reduced oc47,
feeder length aa compaTed with the length, to which
apparatus was adjusted.
A matching device is a mounting strip
and chokes fixed on it,
Conductors with tips numbered according to ti-lo
of the loop compartment mounting strip contacts of the
receiver?aad?goinometer unit to which they should be
connected t are soldered to the strip contact3, The tips
aro secured on respective contacts with tho help of nuts
Seven matthIg devices numbered Woolp No,2 NoOr NO
w44'h
T,T^
AVV,1
t No.6 and No,7 are included into the direction. .I'indc;.r
set 4 The matching devices are included into the shipboard
n4et of spare parts tools and acces5ories. Matching device
Noel ia inatalled in the casing by the Maziu4actureT. The
matcaing devics are chosen during wiring acaodirlg to no
notes giYen. in Section VIII?) of this instruction.
(h) Selsyn
390tyV
The selsyn semls to :rotate the movable goniometer
scaie
./.1 step with the gyro?compass follow?up nystemv Int
the gyrocompass follow. op system ] turned through 1?
rotor of th6 gyro?compass transmitting selsyn turns
through )500 employing a 3tep?up gear . To rotate the
compass follow?up system in synchronism with the movable
goniometer scale a step?down gear is used with a gear ratio
1:360* Fig12 shown the electrical connoction diagram of
th.0 selsynot CA L a transmitting .6elsynoal is a receiving
selsyn. The selsyn excitation windino3 are connected into
the AtC. networks They set up magnetic fluxes fixed in !pace
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4
res
49-,
and pulsating in time. These fluxe8 induce alternating
electromotive forces in the three?phaso selpyn stator
windings, the values o the induced voltages depend upon
selsyn rotor positions o When the rotors of the transmitting
and receiving selsyns are in the same positions, electwo.-
motive forces induced in the stator windings will (in the
respective phase windings) be equal in value for the
stators of both the selsyns and opposite in direction,
thus the resulting electromotive forces will be at zero
in each pair of the coupled phase windings. With the
rotor in this position there is no current in the stator
circuit 4 If the transmitting selsyn rotor rotates through
some angle with respect to the receiving selsyn rotor,
?electromotiVe forces different in value will appear in the
respective phase windings and the resulting electromotive
force will not be at zero; therefore, equalizing current
establishes in the stator circuit and a torque is developed
which tends to bring the receiving selsyn rotor in the
position identical to that of the transmitting selsyn
rotor. Thus, with the forced shift of the transmitting
selsyn rotor the receiving selsyn rotor will rotate in
step with the first one.
The movable goniometer scale
rotated by a receiving
selsyna
2. Loop Antenna Unit
The loop antenna unit includes two screened loops
fixed at right angles to each other .with diameter either
1.2 in or 0.6 m. The loop antenna unit may be installed
either on a special suppOrt 1.6 in, in height, or without ita
The support is a' duralumin tube 84/76 mm in diameter. The
connection of the support upper flange with tht,. loop
lower flange is provided with bolts. For mounting on the
deck, the corner laa.tes of the upper support flange have
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towa ,frop
two holes to receive guys To adjust tension the guys
are provided with turnbuckles. Thc support lower ha-3e
terminates in a connector with a gland. When the loop is
installed on the support the connector with the gland
located under the loop lower flange is removed. The loop
winding (1,2 In, in diameter) has 4 turns; the loop wind.
ing (0.6 m in diameter) has 6 turns.
The looD winding is wound on distance pieces inGide
the duralumin tubes (30/27 mm in diameter) which serve as
a screen g The upper assembly is insulated.
The loop antenna (102 m. in diameter) uses a metal
rod arranged in the centre for rigidity. The loop winding
ends are connected to the terminal Danelo The winding mid-
points are coupled to the chassis through two 0025 g
capacitors which makes it possible to check insulation
resistance of the loop and loop circuit without disconna('
ink; the loop winding mi point
The external connection of the loop antenna unit with
the receiver-and-4goniometer unit is made by a feeder* The
feeder end& are soldered inside the feeder head to the wiying
conductors running to the terminal panel ( See Fig424)
For the general view of the loop antenna unit;
Fig. 130
3 4ion--Direc tional Tvio-ogire Antenna
see
The direction finder uses the two*-wire non-directional
antenna made of an antenna stranded conductor. One of the
wires serves as a principal antenna the second Wire is used
fox. compensation. The length of each antenna wire is 7 in
for directfon finders with loTp antennas of 1,2 m. An
diameter, and for direction finders with loop antennas of
0.6 m in diameter the length of each wirc is 3,5 m, Minima]
distance between the wires is 300 mm.
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7
? r
The length of taps leading from the antenna wires to
the antenna box t I Me'..^ 100 InA1
The antenna wires are 2lot necessal-111/
this case
taken fox
..;. .
the 1011.0014a 0r.= )a ra,4 .1
A. ta
parall
al section of the
the antenna wi:re
; gtv, rrn., w
."1 "11 ???",
can
length from nominal stinllati3(1
dimensionn by 10 prJa:
and
,,c=1)%r
c,
Fla 14. (versions 2 arid -
04 . .rfe shows -c,L31,bt'A t-t11-01-",A
-
of ron-(iirectional antaana
el 41 r
4
With any antenna deign minimum 3-Dace betwin the
wires should not be 1Psr, than 3on mint
The ends of the non-direc ttonal twow.J.4,e ant t.7,???Jicl
.1.
con-Lect,eu to 6,,,e cvilLeaqc;., 1.ne latter 18 coupled tic
reeeivar-and.-goniometeY unit
uc3ing the feeder m.
by
Y.
7 ir.'21
of an ante-Ana lea La
t",- r-1,-.4 , t p.-4'n
7, ?t,
f the feeder conneeting the receivell-an ,
duicimot)7,r unit
with the antenna box may be ine-oeascA up to
oassel the
i
length of the non. -directional w.:Lce
be increased in accordance vith
P'1,1's VIT. 4 of this Manual ;e
44,
thA?-? -
J. L c, ) (
Supply Un..ct..
C.:11
The supply unit is designed as a combjnaton of
units and components -i)o6itioned on two sepaD-ate cha:sis
horizontally located; the chassis being arranged in one
casing which is installed on a mountin frame with the
help of dampers.
unit
The principal ol
are
14
2 6
r,
der
as follows
Valves
i1 0
a
en= 9
* 0 0 0
Transformers
1)
included into
0 3
iyt 4 4 11, 3
dposse .44 rave) 45 e kt 4 P ?-/
0
Selenium piles for rectifiers
40 Capacitors of various types ? a ? 214
5
ituses
4> t C? 3
the 2pflly
piecea
OCQS,,
Oft0004:73
?
Diecost
pieces and
othc:Nr elements.
in
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The two chassis are located horizontally One benoath
the other. The upper chassis mounts 0nsformera' and
valves i The lrower chassis mounts a power tranmfo3m6rp
selenium rectifiers capacitors, The wiring of the SlIpplz
unit is made of the mounting strips and is coupled by n
di$t ibuting frame which is connected to the two mountinn,
strips that serve to fan out the cable ends leading frcm
the control-distribution boareiThe compoa'tment in wilich the
cable is fanned out has a gland to receive this cabl
For convenience during nrpairs the framo securing tiQ
chassis
and wilda6
thrown on hinges :forwa:cd pa:cividing
an access to Lie wiring',
In the .operating position the frame 13 secured by .mo
screws and 4s sealed; only the valves being left
accessibleb
The uppor ca8ing lid covers the entire supply uni?,
and is oecurod by four locking screwrot
The supply unit catiing is made of hard aluminum aa0
is a riveted-welded box with a 5teel frame. For rildity
the box walls are provided with ribs.
The supply unit casin is inst lied on tho mountilln
frame using four dampeYs*
The mounting 'Tame is made o:C angle section
stock and designed for attachment of the :uoply unit tu
the bulkhead Pig 15 (a o,nd b) shows the exte:rill viev:
of the supply unit (wool-led arid closed).
5# CGnverter OH-120
The converter OR-120 i8 a Lingl.aluature conveTter
which converts ship main: direct current into single-Tihase
alternating current of 50 c.p.s. Thc! D,C. ship mains is
applied via the control-dt8tribution board to the motor
Th
he
lit
Elea
(:2
the
TO
tht
on
o
Coy
of the converter, its generator being connected to the
supply unit through the same boardo
Qt,0
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The converter 011-120 is shown in Figs 16 (a) and (b)
64 Control-nOisribution Board
The control distribfltion board is an aluminum box,
The front wall of the ho x is providQd with two lids which
hermetically close it; arranged on the inside of the upper
lid are main elements inclut-led in the board and their
wiring e Located under the lower lid aro mounting strip3 to
which the distalibuting frame is led, The external connoct9,,
Ing cables are fanned out on these mounting stips.o.
The control-distribution board includes:
le
A?C. voltmeter5, typo nB 46 9
meaaurement limit 150 V
400 c p.s,, with a
2, DC voltmeter
type M r)".) with measurement range
300 V (AT-
(B2-01
SwitchVOTTI.,
- :2) MONITORING ( KOHTP0I6
4. Switch A?C? INS ( CETI= /-*.j ) for connecting to
the AC4 main (B2-2).
/ Tumbler SKIP ;S DoC? le_DIS 110 220 AC 220 V
0
( BOPTCETB =110? 220 fA/ 220). ON --- OFF ( BIL?BUICAe )
6e Two fuses - for 5 A and 2 A ( HP"1 and Ilp224
respectively).
The board box is divided with a Da:ctition separating
the upper compartment from the lowe-..tk one vihere the connect.
tag cables are fanned out An accerJs to the wirins is
provided by throwing the upper lid and removing the lower
one; to receive the cables the board compartment is
Drovided with five glands which eufiuro hermetic sealing,,
The under side of tha control distribution board is
covered by a bottom with a :rubber gasket. The bottom haa
a hole with rubber bushes to secure the hoard.
For the top view of the bor,lrd with the lid Open
see Fig#174,
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-054
70 SignallImEjoards
To control and signalize switching on and off the
other antennas on board the ship two signalling boards
are provided .0 one is installed in the chart house ana
the other in the radio operator room These boaT0
differ in inscrtptioas4 the board in the radio opeatc 'o
room bears DISCONNECT ANTENNA ( MAJAPORAM AHTEHITY )
whereas the board in the chart house xeadt; ANTENNA
DISCONNECTED (AHTEHHA MORPOBAHA )0 The in8crlptlon8
become visible only when the lamps located beneath thg
detachable board lids are switched on,
The lids of both boards are interchangeable becauE30
they are attached to the bottom in the same waya
The bottoms of both boards are ar/sembled likeiic
Tumbler switches are arranged on the board lids and
their positions are marked ON and OFF ( 1.31C.L, BUHL),
If the tumbler switch of the board installed in the
chart house Is in ON position a lamp will flash on the
board mounted in the radio operatorts room and vice
versa, switching on the tumbler switch on the board
located in. the radio 6pexatoris room and vice versa
switching on the tumbler switch on the board located in
the radio operatorts room flashes the lamp on the board
in the chart housef
For Gupplying One of the boards is. connected to
the ship's mains according to the connection diagram
(See Key Diagram of the Direction Finder shovn in Fi
and General Diagram in Figft2)6 The boards are supplied
with illumlaation lamps depending on the voltage applied
from the ships main:3 which are ratd for not more
than 25 Wo
For a general view of the boards see F1g4 18(a)
and (b)0
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Ise
the
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55
8. Dynamic Loudspeakers
SG I
.r1
.44
V
? ?
? `?,,,,,,,Ar? ? t
! ?
S1 4
?
The dynamic loudspeakers included into the APfl-50
set azo made aa separate umits one is located in the
chart house and the other in the vicinity of the- belmsman
Power conveyed by the direction finder telephone
channel to the loudspeaker is about 0025 Wt The loud?
speaker is provided with the ON?OFP tumblor switch and
volume control knob.. The loudspeaker is connected with
the receiver?and?geniometer unit in such a way that both
loudspeakers cannot operate simultaneously. One loud?
speaker Can operate only when the other is switched
off. The general view of the loudspealJer is given in
Fig419. The loudspeaker connection "diagrani IG given in
the keydiagram.
Anterrta Box
The antenna box serves for connecting the two?wire
antenna with the antenna feeder. It has a glanu and two
partition insulators. To ensure hermetic sealing the lid
and each 'partition insulator I130 rubber gr.kots0 Two
-resistors on the mounting strip and two neon lamps are
arranged inside the box. For the general viow of the
antenna box in the opelied acid closed positions seo
Figs 20(a) and 20 (b).
10, Autotransformer 220/127 V
The autotransformer 220/127 V serves to sunply
the direction finder from tho A.C, mains 220 Vo The
autotransformer in mounted on a bracket that is secured
to a metal plate. It io covered by a lid with holes for
cooling. Benea-011 there are two glands. The autotransformer
is attached to the bulkhead.
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56 --
Fig. 21 shows the externa/ view of the tester TT 1.,
Fig. 22(a), (b) and (c) illustratesthe case of the shipto,
board spare parts t tools and accessories.
VII t INSTALLATION OF DIRECTION FINDER ON SHIPBOARD
For the direction finder wiring diagram (general
aiagram)- ee Fig.2 and for the external connection
diagramp Fig*3. The direCtion finder compone4ts should
be connected according to these diagrams
Installation af Receivert-And-0
#0.41... kw b...p .... 'WV
Goniometer Unit
Wftf*VMaA?Amo
The receivori-and-Toniometer mounting frame is
secured in the horizontal position on a table or on a
special bracket with screws ?passing through mounting
openings. The receiverand-tgoniometer unit is installed
on this mounting frame and secured win throe looking
seTellis4 Whon installing it make sure that the damper
travels freely and secure the receiver-and-goniometer
unit on the dampers in such a way, that it should not
strike against the chart house walla and other things
during storm.
The ground terminal located on the front panel
should be connected with tho'ship hull*
The receiverwiend-igoniometer unit iu connected
the loop antenna unit by means of a feeder which enters
the loop casing compartment through glands and is falillati
out in the following way; the feeder t)11(1.s coming from
the athwartships loop are connected to mounting strip
contacts 1 and )4 The feeder ends coming from the fore
and--aft loot) are connected to contacts 4 and 6; connec-,
tions being made according to desinations provided in
C
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04.
-.57-
the loop compartment The feeder screens are brought
to contacts 2 and 50
The receiver.4%andvogoniometer unit is connected to
the non-directional wire antenna by means of a feeder
via the antenna box. The feeder running from the ante-Ana
box enters the casing antenna compartment through glands
and J.s fanned out in the following way; the feeder end
coupled to the compensating antenna is connected to
contact 3; the feeder end coupled to the principal
antenna, to contact 4. Conn tion of the receivert-andcd
goniometer unit with the control-dt8tribution board
should be as shown in the external connection diagram
(Fig03). The cable terminals are secured with nutso
The receiver-and-,goniometer unit is connected to the
telephone directly and to the dynamic loudspeaker by
mean of a special cord whose ends terminate in plugso
Figs 2, illustrates the fanning out of cables in
the receiver*-and-goniometer unit casing,
To take the receiver out of the casins proceed as
follows:
(a) disconnect the ground busbar;
(b) open the locks (unscrew the bolts);
(c) pull the handles on the ixont panel to remove
the unit out of the cactingo
When it is required to test the direction finder
efficiency with the casing removed? connect the casing
with the receivell-androgoniometer unit making use of
special spare cables Provided in the set (in the case
of the shipboard spare parts, tools and accessories)0
2, Installation of Supply Unit
The Bupply unit is installed on a mounting frame*
The mounting frame fo.; sacured to the bulkhead or to
a bracket with four screws in. the vertical position t The
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supply unit is placed on this mounting frame and secured
with two screws with wing nuts. The supply unit i8 coupled
to the controlftAdistribution board by moans of a cable;
zonnections should be as shown in the external connection
diagram (Figo3). The cable terminals arc secured with nuts,
To check the unit wiliing proceed as follows:
(a) open the lid by removing the locking 80.1'.eW5;
(b) remove two screws securing the unit to the cas-
ing and pull the unit out of the casing.
3, Installation of LOOD Antenna Unit
The loop antenna unit Tday be installed with the
support and without it (depending on the direction finder
set used and the conditions of the unit installation on
board the ship).
The exterior wiring is assembled and installed in
the following way;
l. Choose the place for the loop antenna,.
2d Orient the plane of the :fore-and-aft loop 80
that it should colncide exactly with the centre line of
the ship
In this casey the marking 0,IP'S HEAD ( HOC ) on
the head of the looD assembly must be dtrected towards
the ship bowt
30 Mark and bore holes for attaching the lower
flange of the loop or supports
4* Measure the cable Tun and cut off two lengths
of the feeder to suit the length of the cable run with
small reserve,
5, Remove the feeder head together with five
Jumpers from the lower asseNbly of the loop antenna and
unsolder the feeder ends from the jumDo2:3 as shown in
tl
10111(
705i
nrin
v?bic:
sim
31171(
r:
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?
Fig.240 The feeder sheaths are interconnected and soldered
to the Jumper marked ?Kn.
6. The feeder head is vaseline?seated and secured
in the lower part of the loop by means of three screws.
The jumper tags are bent and secured with contact screws
of the porcelain panel in the loop head window acco:rding
to their designation.
7* The feeder ends running to the receiver and-s.
gonioMeter unit are preliminary marked which makes it
possible to determine the contact of the loo.:1 terminal
panel to which a feeder conductor is soldered,
8. When the loop is mounted on the support the
connector is removed from the loo-o lower sleeve and a
cable is pulled through the loop suppol-t. The loop is
secured on the support, the feeder is pulled through the
support glands after which the gland bush is tieatoned
9. The loop flange uurface is filed (in case the
loop is mounted on the support the loop and support
flange surfaces are filed) and so is the ships hull
surface near the holes under bolts in order to ensure
reliable contact between the hull and the loop screen,
Upon filing the loop is attached to the hull. The
feeder is laid out and secured; the feeder ends are
taken to the chart house and connected to the receiverandgoniometer unit. The feeder is cut off to suit the
cable run and its ends are fitted with tags.
10. The feeder ends running from the forew-andb-aft
loop are pulled into the loop casing compartment in the
receiver,-*and?goniometer unit through the gland C7 while
the ends running from the athwartahips loop ? through the
gland C6. The tags with the feeder leads are clamped
with the help of the contacts of the mounting strip of
the casing compartment of the loop so that the markings
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?
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6O
Lnthe loop compartment should correspond- to the eliValF1
ment on the jumper tags running fxom the feeder headp?
The wiring is made as shown in the external connection
diaZTam (Pi) and in the diagram on fanning out cable
i2-1 the casing (IT1g.23).
Note: While laying out and securing the feeder care
should be taken to protect the external fecde
sheath from mechanical damage$
4 4 Installation of TwoWire Antenna wnd
Ante4na Box
The description of the two?wire antenna is given in
Para. VI.3 The direction finder two?wire antenna ia
erected and secured as instructed in the suggested erection
diagram for the given ship,
The non--directional two?wire antenna is erected as
shown in Fig L4
The antenna wires are secured through an in3ulatin2:
chain on the deck or 8, ,speciaa br4cket4 The upper end is
Dulled by means of a frame th'Pow;h a block with a hook and
fixed. Then the antenna has to be tightened. Depending on
the length of the antenna lead in i$e. OR the feeder
length from the antenna box f].and to the receiver?and
goniometer unit casing, the antenna length can be altered
The antenna lead-min is considered normal when it equal3 345
If this length is reduced below 345 m. the resonance of the
loop amplifier plate circuit occurs in the operating rang
which is impermissible. It is possible to incy!oaso tho load
?
in length up to 5 mo Further increase of the lead?in length?
is not. permissible as this brings the resonance of the
circuit formed by the antenna lead?in and zero sharpening
variometer stator into the operating range.
th
ro'
ow"
urt
bEl 3pa
zlIns
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When changing the antenna lead-..in length it is
required to change the antenna height respectively (See
the table)0
owe ftm4impo, eat wt....0 *owe.* ...J....0
Antenna lead in
length
365 me
4 rn.
met
Antenna he ir4 case
of a logo 0 1,2 atc,
Vt.kt 00.1.4 HP iiii
5 m .-
Antenna height
in case of a
loopt 0 046 IT4
As the feeder length Is restricted in some cases
vertieal antennas are substituted with inclined ones
When the antenna i8 arranged in this way its
effective height deceaseso Therefore it
to increase somewhat the effective wire leneth using the
same wire guys as with the vertical antanna, The data
on antenna extension in relation to 4.1
aAgle of tilt iS
given in the table
tag.fwvey,mtez opovraktyVv,i,,Q.Megreia,r21,M1.164.20C7
Angie of tilt
with the ho?
rizontal
plane
90?
60?
45?
al. ovIt. n .1114...P.11,01.411-,,,, OnyvisiAltorwl,t,..* aw.t."1...t,V0~????VI,Krtli 5.oson.a-?844 VverS/144....*#,Vi 6.+4 0.84 vs&
Extensionff.,in
v%094,qW.beo01.,.iaaAte4-40.mow#1+,*.r.wa..Att04
With the rated
length 7 m.
?4> on.fm.q ... **..44
,.er"
2
3
With the rated
length 395 m9
gyn. am I.* VW* W.I. ? WO.. %v. b*t; ii va. ft. Tv2, .4 P.... towavvi 404.499 0045.4
The antenna may be designed as two wires which can
be spaced not less than 300 mm x.pirte
The length .of. each wire shovld correopond to the
dimension given above0
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-* 62
The antenna must be in3talled as ohown in Figel4
?where possible alterations of the non directional antenna
realization are given.
The antenna box is secured by four screws to the
outer bulkhead wall. Upon boring holes it is necessary
to file #10 antenna box flanges as well as the bulkhead
in the place where the holes have been bored in ordea? to
?ensure reliable contact between the box and the hul"J.,
Having fanned out the feeder, SCTOW the antenna box lid
all the way in to provjAe hermetic sealing; the lid
'screws having been first coated with vaseline, After the
erection of the antenna the antenna leads must be connected
to the antenna box terminals.
5. installation of Control-Distribution Board
Tho control-distribution board is s'erowed to the
bulkhead or a special bracket in a vertical position the
screws being provided with space-zso
Depending on the ships mains voltage control
-
distribution board is sup:)lied in the following way!
(a) '?hen supplied from the D.C. ship ts mains, voltage
is fed, to terminals 22 and 23 of the mounting strip on the
contxolo-distribution board. From terminals 23 and 24
voltage is taken to he converter OU-120. The converter
feeds A0C. voltage to texidinals .25 and 26 of the board
in st:4p.
(b) When supplied from the 1L.0 ma:?..nep220 V
terminals 22 and 23 of th.t control -distribution board
mounting 3trip are connected to the maiD, The autotransfovW
primary winding (contacts 1
- 2) is conunctod to terminals 2)
and 24; the. autotransformer secondary (contacts 5 ? 6) is
cOupled to terminals 2, and 26 of the mounting strip.
(c) When supplied from the mains 127 Vt. the
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vol age is connected to termina13 25 and 26 of the mounto,,
ing strip.
Cables are used to connelwt the controloodistribution
board to the receive3,-and-goniometer unit and to the
--spply unit. Wiring is made as shown in the general
diagram (F1gv2) and in the external connection diagram
(Fig. )4
6, Installation of Dynamic Loudspeaker
The loudspeakers are mounted on the bulkhead or a
bracket attached to the bullhead one being inatallod in
the chart house and the othe.z in the wheel-housev
tion of the loudspeaker with the receiver-andt-goniometer
unit and
interconnection of the loudspeakers is given in
the external connection diagraffl,
7t Installation of Converter Oflf420
The converter 011-120 is screwed to the floor
through the mounting holes in the converter bottom, The
converter ,011-120 is connect;ed to the control--distribution
.board with the cable as shown in the external connection
diagram The cable terminals ace secured with nuts
8. Installation of Autotranforme:rp220/127 V
The autotransormer 220/127 14 is mounted on the
bulkhead or secured to the bracket fixed on the bulkhead
with four screws. A cable is used to connect the
autotrans former to the control-distribution hoard.
VIII TESTING AND ADJUSTING DIRECTION FINDER AFTER
ITS INSTALLATION ON BOARD THE SUIP
After shipboard installation of the direction finder
it is necesaary to test it serviceability and to adjust
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m064.-
zero sharpening and compensating for radio deviation.
10 Testing the Loop Antenna and Exterior WirThr7
.4. 000 0.1.0.0 004 0, 4.4..4 100 0,-4. *Z. 100 0.0 01000. 0.0 ?011 000 r0:04.0 *AO, MI IF.M....."44M 4".Sklf $$$t CM; P10,1 $
for Proper insulation and Hermetic Sealing
(a) Test the loop and antenna feederG aa well as
the loop antenna unit for proper insulation using a
megohm-meter with the test voltage of 500 V4,
(b) To test the iciop antenna unit and loop feedeT
for proper insulation dioconnoct the feeder terminals from
mounting strftp contacts 1004 and 6 (in the loop compart
ment'of the receiver-andr-golliometer unit casing) and con-
nect the megohm-meter contacts between the feeder torn,nao
and the receiver-and-goniometer unit body,. Insulation
resistance between any terminals and the body must be not
less
than 50 megohms.
(c) To test the antenna feeder insulation unscrew
the antenna box lid and remove the neon lamps; in the
antenna compartment of the receive-and-goniometer unit
casing disconnect the feeder terminals from contacts 3
and 4 and connect the megohm-meter contacts between the
feeder terminals and the hull. Resistance between any
feeder terminal and the hull should be not less than
800 kilohms,
2. Testing the Direction Finder Serviceability
(a) SwitchinL; on direction finder
.y gictdOCIBOR14 ot110.40 3044004 St?tia.Cot
When .supplied from the D.C. ship 2's mains; set the
switch MAINS; A,C. ( CET% ) on the Control-distribution
board to OFF ( REA. ) position. Set the switch VOLT:1n
MONITORING ( KOHTPOn HAHMEng)
in the position oTri-Dt3
MAINS, D.C. ( BOPT--CETL ). Aftex. that o:perate the
tumbler switch SHIPS M.INS DC k 110 220z A0C. 220 V
r:
IJ'
-:-
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- 65 -
( BOPTCETE = 1104 220; 'i 220 V)? When the D,C4
voltemeter reads necessax7 mains voltage 3fA the switch
VOLTAGE MOUITORING to MAINSsv A.X.? On-120
Ing on the AC 0 voltage applied (readinga are taken with
.
rl Li 1 1 0 Dep
the AC voltmeter) tuna the switch A4C. MAINS to the
respective position?)
(1) When supplied from the mains 220 7), met
the switch VOLTAGE mOMITORING on, the contvol
mm board to
switch A
ab.
!leas and accordin8 to the voltage applied:using the AC4
oltmeterp set the switch AC ip MAINS in the l'e8pefltive
0t position,
(2) When supplied from the
6 C 011'4 2 0 positions, whea:oas tl/e
&UINS
.C. MAINS to OPP position,. operate he
ombler switch SIIIPtf.-.;
VO
ty
ion
th3 switch
tior. board
BINttoh
,gt C 0
-,"
to MAILN4,
A,C, mains: 127 Vt. pllt
ONETORTNG on the control-d itribum,
\
1,J 011120 po.eAtionf the
.t1.0vp
MAINS to OFF .0ositiuno Depending on the A0?;
voltage applied (:nadings being taken with the Aee;
voltmeteT); set tho witch AcC. MAINS 4,;, the respec,ive
position. The Dosition of the 1.,umble:e switch SHITS
MAINS DC 0 110, 220p A.Cit 220 V is arbifraxy- 1
-
int
after the direction finder has been switched
on and the valves heated, check voltage values taking
readings with the help of the instruments arTanged on
the coiatrol-diatribution board Fox this purpose set the
S witch VOLTAGE
subsoutintlyt
MONITORING to the following positions
I. SHrlyS KAITS
741?Yr
S IC 01Ft 1.2 0
3 m
210 V4
PLATEt 110
4.
56 RETARDLTION,
6, 400 c,kpas.
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st4f$
s.a
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?66
(Set the function switch Bi 3 in the re( eend
goniometer unit in 1,,A" position)Q
volt
e ;0 -
In the first Dosition ti D (3
meter on the board should tadicate the D ritrtiml voltago9
With the %J 6 mainc vo)ti-1" anTAtod the
in3timen?,4v
should remain inoprative/
in the second position
voltmeter should indicate tha shipls 41.Ctc main voltage or
*C0 voltge, 127 VI appliccl frOM the con,vete 0R-120
or autotransformero In the thi71:d. positim PlJTEI 210
( AWAH. 210B) the DC e voltomter should in_ticate
voltage from 230 to 190 V; ia the fourth Do3it1on PLATE;
100 V ( AHOWie ION) from 110 to 90 Vtl, In the a,fth
tion RBTIYADATTON (TOPM ) the DC 4 voltmeter should
indicate DoCe voltage from 20 to 10 '1st; In the oixth po i-
tion 400 ccp980 the A.C?, voltmeter should indicate 90 V
(fluctuations of the instruTent pointer aro permissible
within 135 to 65 17)0
If measured voltages correspond to the values given
above the apparatus is considered to be switched on
correctly
Note: The possible erro of the inztrimont DB-46
OH
the
(the AtC0 voltmeter) is 4205 per cent at the temperature
of 420?05?00 With temperature changes from v-50? to I-50QC
the accuracy falls by 1 per cent of the rai.raum stale
value for each 10 of temperature CM1-10a
The po:3sible error of the M0-63 instrument (the DCeo
,4.r)op
voltmeter) is 14 per cent at the temperature of +200u'"
At ambient temperature fluctuations from -400C to 4450?C
the instrument accuracy decreases by 2 per cent of the
maximum scale value for each 100 of tem.00ratuxe changoe
(b) Tuning direction filidor
(tQf 44 4 d *4940000044,? 04 ter401
To tune the direction finder proceed aa follows:
10 Set the band selector switch in such a position
that the transmitterequency is within this bande
-
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fre
the
in
WI]
aoh
to :r.
ach
0:
V*3
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... 67
2. Turn the function switch in ;a position
30 Operate the tuning knob to set the required
frequency by bringing
the corresponding index .line of
the tuning scale in line with the cursor llns arranged
In front of the scale
40 By rotating the turning knob within narrow
limits obtain maximum deflection of the tuni. iniicaton
pointer (In this case the h1ghw3t tuning accuracy is
achieved when the maximm defJectioD of the tuning indica-
to :1 Dointe2. occurs in
achieve this ol)o.xate
fliOdie of the scale, To
the knob voLuif (I1P0i1NOCTT-)
:(75, Make r_wro the dirction findei is tuned correctly
to the requied :cadio station by listening to its call
signals, Durin6 reception of unmodulated oscillation put
the tumbler switch
Note:
it
in MT -ooition,
is not advisable to operate at frequencies
of 260 Ke/s1 390 Ke/s 520 Ws and 650 Ke/.3
with the tumbler switch in VT position,
(e) Testing telegraph operation
0,06%9641a4069004a60*104 4-000a 4
Put the tumbler switch Tlib-Tur in TAr position
during "A" or "Co !node of operation (in ,IAIT mode (If
operation the second hete:codyne does not operate); in this
ease beat note :3hould be heard in tht3 telephones which
changes as the knob MAT NOTE ( TOH Bnia ) is turned to
the right or left to attain the frequency of 2p000 e,p,s.
Haviug been sue that the diroction finder is
fully serviceable in t;Aq mode of operation, proceed to
test it semiceability in pan and AlCu modes of operati0no
(d) Testing operation in 0Au and oCu modes of
13#17430 41 00 444 449 4a3a4 4 goa va6a-o ao4a444.
operation
Without diL;tul'bing the tuning p turn the function
rj
;
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:g
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switch in HA')
position e The goalometer indicator should
read the transmitter bearings Turning furtheT tho
function swith in nV position and operating the knob
Of the ZERO SHARPENING CONTROL, make sun that the
manual zero sharpening control is operative o If the
zero sharpening control is effective the sound dur:,.ng
the rotation of this control should rise and fall (in
ca$e the manual volume control should be adjusted
to obtain the sound level convenient for the operation)
Theni, manipulate the SBARCR COIL ROTATION C BPAillEHNE
MC-RATER ) knob (B1-5) to deflect the gonionieter
indicator to the right and left from zero :J!eception;
in both cases the sound must rise as the indicator
MOVG8 away from the bearings
finder operation with
crystal on.s,
- With the func,tion switch in Ra" position put the
:switch CRYSTAL Iii ON- 'position and tune using the tuning
The,toniometer.indicator should indicate the same
bearing as without the crystal,
(f) Testing the goniometer indicator setting
*00?40.?? a? a* 6 0 t ?P004 000 ?? 0 ? **? 00 6 4 0
Having ascertained that the direction finder Is
'fully serviceable in all modes of operation, check the
gonlometer indicator for proper setting* For this purpose
short?circuit terminals 1 and 3 in the casing compart?
ment and then take bearing from some radio station,
In this case the radio relative bearing obtained
has to be about 0 or /80? (on he fixed goniometer scal)
If the radio relative bearing will differ from 0? OP 1809
t is necessary to remove the glass cover, to unscrew
the 14dicator lid, to loose the nut, and to set the
indi
oator in 0? or 1800 position; than to screw in the
nut
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and lid and to fix
the loop antenna
- 69
glass cover. After that un5hort
Testing the loop
4614644%ii ta444/ 4g 149014
tion to poniometox
rp$ 47010'04 ilP,064?5
antennas for correct connec:-
t Ir tp e f? t it t?I 4004r:4:r
Evan being completely sure that all the oollnections
during the direction finder inntallation have been mao
as instructed 7 it J_LI necessary to chock the direction
finder for -proper opeTation. For this purpose take bear-
ings from two or three radio stations whose -elat-ive
bearingo, are known. For conveniences sake choose stations
located either to port or starboard Supposts that the
-radio relative bew!illE for radio otation Noel equals 250
and that for radio) ston U002p6 ?. Helco, when tak-
ing bearings from Tadio stations No.1 and Nci?2 in turn,
radio rPlative beaTings obtained must increase clockwise.
If radio relative bearings obtained for stations No.1
and No.2 do not Tar ie the relative bearing for
both stations is tho same, it means that the ends from
both loop anteanas ars connected to each goniometer field
co-J, To eliminate this defect interchange the feeder end
Pi-a with the eLd P11-14 If after that radio relative
bearings obtained do not diffor it is necessary to return
the end of the second /00D antenna PlIv*1 in it former
place and to intorchange the end of the first loop
antenna PI-,41 with the other end of the second loop antenna
PII-2 and to takt, test bearings once move. Now 9 radio
relative bearings obtained for radio stations No;1. and
.2 should differ. In case radio relative bearing;
change not clockwiL!,e hut counter clockwi e it is necessary
to interchange either the end Pi I with the end
the and PII4 with the end PII-20
s, r
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?1,
These readjustments completed; radio relative
or ,C
bearings-p, when taking bearings from radio stations I
and 2in,turn? should change clockwisoe
It should be noted, that if the pointer does not
WO
A.eflect, wIlen one of the field coil ends is closed it
Iengt
'means-that this end is shorted to the body, It is
NOY
nede,ssary to remove the short?circuito
in th
unif,
The next step to be taken is to check the sense
40
ra -1
de:bermination4 It is checked by taking bearings from
the radl.o station whoso approximate direction i already
an4 --? indicator
o
ra:
ends froaLthe lopp4 ie to interchange PI-1 with PD2
nI1 with P112 or to turn the goniometer leng
through 180 using the method referred to in Section VIIIif
knowna If the sense 'determination is wrong (shifted ai
by-180?) it is necesbary to interchange all the four
o letigth=
feeder ,
,These .operations ,comp4.etedt the direction finding
shb,ul0. be corrects
(h) Testing sense determination
S4)0,000000#0**01,900000000000.
?Ldjustment of Direction Finder
'Having checked the dil,,ection finder for correct
lstallation it iri.required to adjust the direction
-
Cinder p Ie to Match the length of the loop feeder and
o adjust modulation.depthe
tchiniloop'-feeder length
0,a44?0*PO4ag000pteeppopP$00
length of the loop feeder to which the direcu-
ionfinder.haS:been adju3ted; is shown on the name plate
e loop comp mont of the' casinge
1*.phdin -.onthe'indexr, 4rection finders are
deltNidred.:adjljs-4,0 t the fo1Jowjt lengths of the loop
1114(ina0x 4 .1'6m)- ,26 mr (index 16 ? 26)
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Matching'
dote?
Noi
IWW0*M$110t1.4#%11.1
from.
?lith
not t
devie
above
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
71
or 30, mo (index',26 30 in) e If during the direotioa
,finder'installation,on shipboard the loop feeder
length occurs to be reducedas compared with that to
whiCh ',the given apparatus has been adjusted 2 it is
necessary. to'match the direction ander with the present
length-of the feeders, For this purpose it is required to
'remove matching device Noel installed by the Manufacturer
In the- loop compartment of the receiver-andoToniometer
_unit and,tb insert in its place one of the matching
Adevice 6 -in accordance with the table below
consgagultegm4mmus,w0.9+11..wamt
Difference
between
real loop
feeder
length and
adjusted.
length
4mire,
W4rti; $030.04 4.4,0,41 WOO
Matching
device
No.
0,040.
ling~....?~0.40.0010,4X4M.44.40.0
04 44, ..06 .....0 **TO ...41, 1~ 4.4411 0000 i W .1 k 4~ .44 0.0 ..4a ~ ~ I400 .0 ...
I
0
cc\
4.10.10 WA*
0
pe-N4, r4
H
t????
*, .*4 *aft
Nos3 Np.04 No405 1ot6 Noa
1
0.e.1110,K0.4....oper4....1000
Permissible deflection of the real feeder length
from the -adjusted,length,should not exceed 1.1 in,.
The increase. of the real feeder length as compared
with that to which the apparatus has been adjusted, can
,not_be,readily compensated for by mplacing matching
devices and therefore use of feeders haying length
'above.:ratedrip:aqt allowed*
Use of feeders shorter than 3,ms for index 4-15t
lort,er than, 13 me .for indo 16-26, and,shorter.than
r -index 263O: i6..not:allowede
thematcl.iiii.gdevi'ce does not correspond to
66p feeder'lenc;th.aui.al and automatic bearings
not coincido Ttis observed, during operation over
?
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
,
72 -4
the second band at frequencies 6%0 750 Kc/so
(b) Adjustment of modulation depth
i44,440006.0,0 60*****/****0** 4 00
Prior to adjustment of modulation depth it is
required to check the bias voltage across the valve
grids of the control circuit (R1*-74 screw-odriver operated
control) The sorew?driver operated control is locatad
in the power unit compartment of the casings Bias v:aue
measured by the tester TTI between the middle terminal
of the regulator and the body should be within 14-15 11.
Modulation depth is adjustoa in the following my;
1. Put the function switch in "A" mode of ?Der:It:ton.
2* Tune to a sufficiently powerful station in the
beacon band, To do this proceed as follows:
(a) Turn the knob VOLUM about 900 to the left from
the maximum volume position)
(b) Tune to such a station that the tuning indicator
pointer should deflect over the full scale
30 Uso the modulation depth regulator to obtain the
followingt
(a) The goniometer pointer oscillations should not
exceed :40?0
(b) The difference between the bearing positions
when the bearing pointer approaches this position from
different sides should not exceed 1003?$
For this purpuse the direction finder is adjusted
to operate in "C" mode of operation the goniometer pointer
deflects from the boaring position and the direction finder
ia adjusted again for "A" mode of operation0
It should be noted that the maximum output voltage
in "C" mode of operation appeares to be of the same
order as in " mode of operation
,
rig)).
VI 0
plat
reee
ara
RECE
not
dire(
coPP(
ti
foil
tot
tion
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
Note: The modulation depth control is in the lower
tftahand Corner of the direction finder front panel and
is covered by a turnable name plate o Under the same name
plate there screw?driver operated control of the
receiver.snsitivity marked Cle..I.IN6 These controls
are arranged s shown oz i the name plat6: The control
REdEIVER GAIN is mounted by the Manufacturer and it is
not recomMeinded to readjust this control during the
direction finder installation, on board the ship4
) 4lutomatic zero sharpening and radio deviation
-6t4,0'0$.440000044001,0000000u4s)0 00,61+0444:4*4600
compensatiog in the dixection finder$
ttti/%*v06.00,140,60.16 :%406***00000a000
Prior to the calibration of the direction finder
it ia required to check the zero sharpening and radio
deviation 'compensation controls for proper operation4
Antenna effect (zero cleaning) is automatically
compensated fOr on,shipboard at frequencies of about NO KtV5
with the transmitters abeam and with the deviation chokes
switched off&
The zero sharpening control is checked in the
.following Way:
10"Rdmove t4e'easing lida
Put the dumpers in the loop compartment in OFF
-poSitionti-Terminals 16, 17 and. 19, 20, 21 close and the
compensatiOn:chokes are switched off
torminal 5 of the antenna compartment
to tlie_ch:assist
InijVi mode of. operation set the goniometer
indicatcir, in the minimumivolume positiona
uthezero'pharpening control (B1-7) in posi4-
While switching the second end of the jumper
frOU terminal to terminals 8, 10? 12 and 14 be 81,1TO
at an output signal changes with the jumper in different
?
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
output
(B1-7)
driver operated trimmer CI-,137 with the zero sharpening
control in position I make sure that it operates lorol-,ela?
80 Unshort terminal of the antennat
The radio deviation compensation elemen
checked in the following wayt
Is Put the jumpers IftiTii2 and n1-3
vs. 7 4. Rrii)
74 In one of the jumper positions make
ignal changes with the zero sharpening
set to different positions. By rotating
sure an
c ont
the 3 crew-)
;
t.na
loop compartment in ON position4 Terminals is r:rptta
22 close and the compensation chokes are switched
on
20 Tune to the radio stations whose radio l'o_ativo
bearing approximates a quadrant at the .Lc,quency of
about )00 Kc/s and mark this radio relative bearin&:?
34 Rotating the compensation chokes with the
of a screwdriver make sure the indicator pointer
deflects4
4. Having checked the compensation choke for
ability put the jumpers to OFF position
f5c, Adjust the mechanical compensator to read
correction 4 To achieve this proceed as follows:
(a) Rotate the disc (by the knob SEARCH COIL ROL,
TION in DCH Dosition of the function switch) and set
zero division of the correction scale against zero of
the fixed scale* Holding the goniometor indicator by hand
remove the lid from it, unscrew the nut and remove the
clamp keeping the indicator in a zero position o When rem0Y?4
ing the clamp the goniometer indicator should be 10
to the left ( sign) from
ho
sear;
zero
f.2131
zero of the correction scalee
if it is not sor set the ,goniometer indicator at 1? ?
division from correction scale zero (by rotating the
adjusting screw, which corresponds to fixed scale zero
and thereabouts).
'2
a
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(b) Make the same adjustments for lep 20?I, 30?,
.etcf, to see that the adjustment is correct 4 U. while
rotating the disk; the goniometer indicator will be fo4'
all 36 points 10 fto 20 to the left from correction scale
zeroit means that the adjustment is made coxrectly
(e) After these adjustment put the clamp on the
onimeter, indicator so that its index line should
coincide with correction scale zero, secure it with a
nut and screw up the indicator lid,"
6 Cover the goniomcter window with the glans cover
and put back the lid of the compartment where the cable
^is fanned out,
it shoulci be noted thaL, the radio deviation
compensation chokes are usually connected to fore--
and-aft loop PI and compensate for the negative radio
deviation erros the wires with tips being connected to
terminals 1/v 12? 131 14 and the jumpers with tips clos-
ing terminals 7, Elt and 9; 10.
First adjust zero sharpening, proceeding as follows;
lt Tune to a well audible radio station operating
the frequency of about 300 Kc/ a (in the beacon band),
2o Assume the radio relative bearing of 900 or 2700v
3$ Put the function switch in UC positions
4. Find the aural bearing by using the manual zero
sharpen/mg contr61.
*3 Remove the lia from the casing*
6 Short.A.circuit terminal 5 of the antenna in the
casing.
Put the zero sharpening switch (B1-7) in posit-0
By changing the jumper of the compensating wire
from terminal :0 te terminals 8? 10, 12 or 14 find a
positions in which the voltage in the telephones
core ases when the jumpor is conneOted,
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4
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76"
9, Select such a position of the zero sharpening
switch p in which the volume in the telephones is at
minimmo Final tuning is performed by the trimmer CL
10* Secure the jumper with the help of a Putt
11. Unshort terminal 5 of the antennae
12. Cover the casing with the lid*
After zero sharpening adjustments del; ermine
deviation using one of the methods described (with
function switch in uAll position), Having calculate
valve of radio deviation plot a curve of
radio deia
? ()
1 P.71
tion in relation to a radio relative bearingp and fii
value and signs of radio deviation coefficient
To compensate for received radio deviation
an follows:
l. Move the goniometer indicator in accordm
kj,
the calculated value of the radio deviation coefficient:
by the method described in. Section (VIII; f),9
- 25 Open the lid in the casing and
put the jurcoe=
riii n1-,2 and 11-3 in ON positiont.
3,, Compensate for the radio deviation coefficent on "
employing the electrical compensation chokes for whch
DulApose!
(a) If the quadrantal radio deviation coeffcic-nt
Is negative connect the leads from the terminal block
where the compensation choke onds are fanned out (in the
casing) in the following way:
terminal 16 with terminal 111
terminal 17 with teTminal 12;
terminal 19 with terminal 13;
terminal 20 with terminal 140
Put jumpers between term:LI-laic) 7 8 and 9 *- 10
the terminal block for the loop ends,
In this case the radio deviation compensation
chokes will be connected to the fore-and-aft loop.
th,
th
of
fo
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
If the quadrantal radio deviation coefficient is
negative the leads from the terminal block for the
chokes should he changed from terminal 11 to te=inal
from terminal 12 to terminal 8f from terminal 1) to
terminal 99 from termillal 14 to terminal 102 the jumper
from terminals 7? 8 to terminals II cw, 12 the jumper
from terminals 9 10 to terminals 13
In this case the radio deviation compensation
chokes will be connected to the athwartships loop
(b) Release the locking screws of the radio devia?
tion compensation chokes&
(c) Rotate the adjusting screws of the chokes with
the hell) of a screwdriver to set the cursor of all
the chokes against a figure corresl)onding to the value
of "A" coefficient of radio deviation being compensated
for
4, Repeat procedures for compensation of radio
deviation once MOTO and having calculated corrections
for radio deviation plot a curve of residual radio
deviation Maximum value of residual radio deviation
should not exceed 1--5?0
59 Having opened the goniometer glass cover, remove
the clamp from the indicator and adjust the mechanical
compensator by means of the adjusting screws consulting
the plotted curve of residual radio deviation, Tvile
adjusting the mechanical cowensator the following
should be borne in mind:
(a) It is not allowable to turn an adjusting screw
more than through 20 -4 30 of a revolution of the gonio
meter indicator, If this rule is not Oserved the template
may be damaged as turning any of the adjusting screws
by a value higher than required for the indicator revolu?
tion through 20 3?f bends the template spring
fr
"sx
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18 : CIA-RDP80T00246A064800280001-2
.78.
excessively and may break it and damage the clamps of
the neighbouring screws. Therefore compensator adjust-.
ment should be made not at once but in several step04
For this purpose the residual radio deviation curve
must be replaced by a series of cux.ves approaching the
principal one. Perform consecutive compensator adjust?
ments consulting these curveso
(b) At the first adjustment step the following
sequence of adjusting 3QTOW rotation should be observod:
100, 340? 20?f 3)0? -0 3002 320 ? 40?, etc,
When the compensation is carriecl out in this way the
template body will approach the centre in one section
and move ii,way from the centre in the other, as positive
correction for radio deviation is introduced in one
section and negative in the other, Suggested sequence
of adjustments protects the template body from excessive
mechanical tensions
Taking into account all mentioned above attempt
to adjust the compensator observing the following
proceduret
(a) Apply corrections according to the residual
radio deviation curvet To do this set correction scale
zero division against 3500 on the fixed scale and by
rotating the adjusting screw corresponding to 350? set
the goniometer indicator according to the correction
scale to an angle corresponding in value and sign to
the radio deviation plotted in the direction of 3500
on the curve4 By the same method determine corrections
for all 36 adjusting screws keeping the sequence given
above: 350? ? 10t 3400 ? 200, etc, and setting the
correction scale zero division in turn against all the
divisions with figures on the fixed scale
(b) Cheek mechanical compensator for proper adjust
co:
Peel
IVO
to
by
mol
via
go
is
tic
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?
?
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79 twe
mento For this pnrpose set the compensator disk
subsequently at, the divisions 0% 10?, 2e, etc e and
ohetk to see the goniometer indicator readings
correspond to the radio deviation curve 4 If necessary;
perform readjustments simultaneous1y0
(c) Having ascertained that adjustment L performed
orrectly close the goniometer window with the glalis
'cover and place the clamp removed, from the indicator
in 3pecial clips located on the inside of the asing lids
(d) Setting the goniometex movable scalec
000601t a 69e
090aaa0 a a a a. al 4 0-0 a 4 6 4 0 *
After radio deviation has been compensated for one
must match a goniometer movable scale -oosition with ship
greo.-compase readings, For this purpose it ts necessary
to unscrew the cap to release the knob COURS SE,TT1Ni.
by turning it counter?clockwise and thenp rotating tha
movable scale by the knob, to set against zero o?C the
goniometer fixed scale that degree on thp movable scale
which corresponds to a ship gyrocompass readings
Having matched in such a vay, secure the knob COURSE
SETTING by pressing it to the direction findor front
wall and by turning it clockwise as far as it will
go and then screw up the cape
IX. APPENDIX
Instructions on Testing the Directiou
Finder Valve Characteristics
The test of the direction finder valve chaTactexbistics
is performed by the tester TT?1 when the complete direc?
tion finder et io used
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
, Prior to testing the receiverw4ando-goniometer unit
is removed from the casing and is connected to the teter
by means of connecting cablesp supplied with the sot o
spare parts tools and accessories*
The ipolume control j
set at maximums and the function switch p to position itAllt
Prior to taking measurements allow 2 ? 5 minutes
to elapse after the direction finder has been switched on,
this time being necessary for the valves to warm ups To
monitor supply voltage;instruments arranged
distribution *board are used Ease connection of the
valves, employed in the direction finders is siven in
Table 1*
Testing valve characteristics is performed by means
of th,eteSter'TT-1 according to the following rules;
'.140H0..aterVoltage (A4Cs) is measured between the
valvo. heater pins according to Table No 4l.
2G Plate voltage (11Q).. is measured between the 1
pins and receiver body*'
Screen grid voltage (DC.) is measured between
the screen grid pins and receiver body0
. (There is.XeC0'. voltage across the control valve
Hscregrias)* ?
4. Bias '(D004) is measured between the cathode 1)i1
and receiver body
In the control valves, GHGC bias is
between valve pin 5 and the receiver body.
Rated characteristics for valves
Table Nos$20
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Suppress OT
grid
plate
pe._..4-Mtsfr,qfm.,qtr,yampstxeppp,r4..rpzoipgay.v_=twr,,z?-=,z-.,e,g,agtvA.t.w.hjmt,f.r.,.-Aie,_tk&rrpwtcm,rs,rxa*;yvar,a-3.Vf_,_,,:p,VfaFZ....es., _
?
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?'?!
? ;'?
? ? ?.,1 -
;?" ?
82
Table No92
Characteristics of Rec eiver?.41nd.ftiGeniom et er lJnft
t..44.1.00 *WS vaoslisot W. N. vent weer
ctw
Valves in tfilit Mode of Operation
ipajrip.vpao e.4.4..414. 0.6 IR.O......odiveir.* 1.0....11.44 4.4 .4 4.4 %Mt W.. IP* "Makb
40.14,..411AZA. WO( 4.10"1.41,????? ClegirrOtn....0 .???? tome amid6.444MIT.
?-?on "wawa* lawir ?01.-.4.0j14.0, *oat am.
Heater Plate Screen
Stage voltage voltage, grid
V voltage,
eleitataretike *we mat r-we
.4.0t 0.4.1.40 1....4.14 v.* OM% ----.
Direction
finder output
amplifier
C ontrdl plate
detector 1
aim: II -
.41.uado oscillat?
Phasing
c ommutat or I
and II
- Loop amplifiers
iligh-ofrequ. enc y
amplif or
,Mixer
ist het-erodyne
1st :int
- f2,equexiCy
' ?,;? :1_4 ? ,
prool.t.sai leas, 4.11. Weal 4.//46 4011100 0,Y .01.0. 11...1 *OM
2
4.1.6 or* ow....
603
6.3
6.3
3
170
160
6) lepo
6.3 160
643
63
6.)
6.3
85
90
70
90
4
85
70
160
124
90
5'3
36
70
40
01.0.40.111........A.......114...,11.,*0 Awe 411... sow. maw.* Its
Bias
V
Ins. /My ?10.6?10.1,
?14
VC*
few.
Cathode
voltago
S., .01 Sn
441...11
6
To), glee wavre, 4,4,141
et"
+505
;
".?
,????4?
wooed"'
Pete
11911?.!
am:
Tele)
PIT
2nd
Ono(
ti(
cont:
oper
set
ION,*
Motol
i3one.,1
(1-ex
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1.01440 40,144,
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errattryaingArtak.004***;41,04tert.00.. frtret0.001.*********
cm.** womi **Atoms awn ytts Oft* war.. 0****1 4.0 Walar*****
2nd intermediate
frequency
amplifier
Detector
L.0w7frequency
amplifier
TelephoAe out-,
put amplifier
2nd heterodyne
(mode
tion
of opera-
Tuning indicator
amplifier
Note:
00111410?1124.1V0p.k.
4 '1
k../
603
6t3
3
00.1.3.4.0.10.0 .1.870POIND
85
$704
60
90
85
603 75
orryylari. otatt
4
...411.fteria6rot.0400*****M
55
tan
65
3 .
bat
OA,
0tPrY
+5 rs
s
Irtrrt
+14
Valve characteristics are taken with the gain
control knob? modulation depth control (screw-driver
operated) and receiver gain
set at maximum
4***********60,0.**
Stage
641,..V0***0***000.,40.10
1
Driver
Motor supply
r'enerator
1 and 11)
knob (serewo4driver operated),
Table No,3
Characteristics of Power Unit Valves
Heater
voltage
IT
torn a.* two. 41.1?14 ???411 ? WO. gm.* own am* 3
Plate
voltage
V
t.?
...St .. 0`..
** **** .** **Y.** O.** rtry. Yr, try** yr*. ryyr rr........* ....*,
3
61,3
1. *4 Yeaplo
3
.4.14. loamy ...A 0????? be.
105
225
.0.411 0041
Screen
grid
voltage
V
4
0.4
223
Irnr+4 CM) Mt
Cathode
voltagey
V
5
yttry wow.
statmey49.410.*******.***40
Bias, V
6
?L
oast' 8
-34
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
Symbol
according
to key
diagram
i.
Tp
(- 7 )
Winding No3i
(relative
to core)
1 _ .g.lawacprAlacpepta ? ~.0gesr4...g.R.-4111..~,e6
AISROVIARe.0.1067,...4.10,1,3:4ANgli.OMAKtro.aity
I Beginning
I End
?,,+,...........................4 --.........-
3 I A
...............,... 01........anor
......v..,
Winding Data for Transf
Panel contacts
4,01,11.00
1
:al) 1-3
Tp12
Tp 1-3
(T-76)
woraakt..K
'Pp 1-4
Winding is
wound on
middle -rod
Windtro. Is
wound an
end rods
101/q"
2
woe*
5
3
2
rmers and Chokes
?045.6;???????.bersasftp...**
Number
Wire, ala. of
0.07 mm
1
Ira ___________
7 6
1
I 1
3
1
turns
5200
1 4.51.40:1..43400.04.....57PV.Ift ft... +Nine* cotivaaraoadSaln,.....*maeargo.LVI -
,o.06 mm
11500
5280
2 0006 mm
; 8900
?sier44.........* ?????? AlPyr ....rwasooma.,.......71...asasproune.".
4
3
4 A
?41,0..7.11.000...Wh....i."POr....e??? Om*
,? ?
??????? 9104.01
--
4
..????????1.????????0??
500
turn
in one
yri
--,Ord.....c.***.verr,".....htiecenar0.0.wikr.craya,..4.4251itewoNormor.
800
1 ?1110
ova mm
' 1600
.11b13.4.4.16,
NotQ,
In common
screen
1Trans-
Izormer
lues
Lao
-
iyandings
'common
iscreen
..mr-o...eognurnal*. ?wrsir?roga. ne?????.??????.???????..?.',0 YAW
6
OD
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18 : CIA-RDP80T00246A064800280001-2
_
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
'17-"""",.:,r , 7,-7'7'.7`-',-",""7-^.--4.-4---i--,-f,-,,,, -,-.-.. .........x.......-.,,,-,--,,,:r...::.-7,--?,=.,"',72.:7_=';::74: :Z.,.'";;;": '''-'7,-`7,'''',",'''''''''''"'"''""'":7 +.:.'--4,-,;-.".,-,?,,,-,:-3-',--Z.:,V,.....,-44.1:;,.......-,,,,.:,.-,:;.'....,.;,,h.".....v.r.,',!? ::.1.-.E,.:,,,',4,...4.,..-.5;;-,?....?;?,.,,,:,::....,,,",,,,,',S;,,,,, ,',,,,,-,,,,;,':,
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Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
_ ?
. ?'?'?
oft 87 p.m
3e Trotibl Chart
opitmaltavvviplormewolioulwilft-Are049-400,10.
1.4441,4001.44104.746=044.41.420.4%44,g4~44.44-Mmow**.lais44**m110*.4.044*.mg;
Trouble
tellistVA0
4,04n1P****W49**
2
WM 4..4 N.44.,4446144444p.40,*46 444!.
With the
AP& =Vamp * Agoo
4,4*.
Possible cause
44******.O.O* IPftMe
****************
twaM..4**OMIA
Remedy
function witch in
The direction
finder is
switched on
but no
Yoltages on
the control,
distribu--
tion boards
$ag .140 *Mr} 4th
(1) Contact fault
in the supply
circuitss
(2) The fuse in
the board is
blown out4,
simbi
In the -nresence
of voltages
-
on the
.control
distribution
'board the
'direction
finder does
not 'operate,
irrespective
'of a 'band
switched on
,***************
1) No contact in
the supply
plug of tha
receiver?and-A
goniometer
unitl
One or several
valves are
faulty.
No contaCt in
the telephone
and loud--
,speaker pluga.
(2)
******.w.4.44.-.***
a. 4.44* * * Swig
i"rectidi
finder (doer;
not ope rat a
4
40-6,1rwoc4mW00.11,0m*ON*4104Witcwa*e4W4.0.4..440.weveR,W
4
11 position
Check circuit
continuity
in the board.
Replace the
fuse.
..*****W4*****400
Tighten up the
Iocks on the
receiver?and?
goniometer
unit.
Replace faulty
valves
Repair the plugs.
*..** ***************~
No contact in Replace the
the band circuit.
seloctor plate
?
44!
511
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18 ? CIA-RDP80T00246A064800280001-2
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18 : CIA-RDP80T00246A064800280001-2
of any eircuitso
) 0/c in coil of'
one of the
circuits.
(1) 0/c, in wire
.running to the
:tumbler -
.1A04-TAP;
the second
heterodyne
connection2
replace the
faulty valve
Change the
tri)11111eil, C1-.98)
Teplace the
(1) Valve 6118?C
J11-12) is
faulty,
(2) The tuning
Indicator is
faulty,
:Omission loss
of one or
seve-ral receiver
valves
Change in
:caacitance of
one- or several.
capacitox's
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
high intemediate
or low frequency.
stageso
(3) The antenna is
not connected
Failure of manma (1)Failure in the
circuits of the
rotation of the vi1tch SE1IRCH
search coil, COIL ROTL.TION?
bTeakage in the
circuis
the APN
motor wind?
ing:5,
2)Faulty ve.ives
of the Cixivel%
or power
? amplifier i4
S upply unit.
(3)110 contact in
the oupply
pliig in the
-recoiver?and?
coniomoter
Restoro the
connectiono
RtoT:e the
?itti
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18 : CIA-RDP80T00246A064800280001-2
4o?
2
8 NO180 is heard in
telephones, but
no signal
reception at
any po,sition of
the search coil,
Strong cracklings
when the
goniometer search
coil is rotated
4R4.4.
10 Minimum is blurred
when taking bear
ing in 11CH mode
of operation
far.
4-- 90
(1)Failuro of the
circuit of
voltage
transmission
from the loop
antenna unit
in the feeler,
in :-:;oniomete-r,
slip ring,
faulty valves
of the loop
Li' put,
(I)Poor contact
in the collec
slip rings,
Oil
(2)The rotor
brushes come
off the
collocto
(1)The antennu
ia disconnect-q1
or broell
(2)The antenna
is oholit,
(3)Breakau,e in
the variometer
circuit,
4
0.45
Reatore the
conection,
restore the
contact in
the
ter,
cnt3
va 1 v- e
can the
groove of
1:11-1
I
11 t ? 1 1
LI) 4
1.,fle
Drushe.
Connect the
antenna,
remove the
breakage.
Raolace the
antenna,
Romove the
broaka6o,
1)
14...frar
14
Declassified in Part - Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
Via war
ii
tfact
Declassified in Part.- Sanitized Copy Approved for Release 2013/03/18: CIA-RDP80T00246A064800280001-2
evi 91 ix,*
9
14
4.4**,..4,rwn mom wmw .roo4m*0
Minimum axis bend
exceeds 1Of
46.4.
44.4 .4
The antenna is largeo
1
4.^..*W.i'ep44or*..egrPI4WW.s.
I
447.4444~.444.4.....v.4~0.44.4.VOisNm