SIXTEENTH STATUS REPORT PERIOD 5 JULY - 5 AUGUST 1956

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A001300090003-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 37
• Document Creation Date: December 23, 2016
• Document Release Date: January 15, 2014
• Sequence Number: 3
• Publication Date: August 1, 1956
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
CPDCT-
Memorandum:
Subject:
CONFIDENTIAL
Sixteenth Status Report
Period 5 July - 5 August 1956
1 August 1956
1. Project Study:
50X1
ILLEGIB
Doc 4 7 WY DATE C37? Byea33
CEA COMP405,5 DPI 5-6 TYPE Alto
CBC CLASS EACIES al/ REV CLASS 0-
JUST -2,1-- NEXT REV ',0P/ Mail: Et.2
As the two mobile units had been delivered, there was but limited
activity awaiting the installation of the mobile units at their
selected sites.
The slave station was established on a more permanent basis.
Some refinement was made in the installation of the horizontal an-
tennas in that a messenger cable has been installed, actually a
1/4" nylon rope to relieve the down lead of any mechanical strain.
Several sections of the Instruction Manual have been drafted and
submitted in this form for consideration by those concerned.
Following a hurried preliminary reading of the available material,
it was requested that much more emphasis be placed on the equipment
time delay factor. This should be emphasized even in the introductory
section.
A description of the methods used and a copy of the results of the
equipment delay measurements were submitted. Because of the impor-
tance of these measurements and the wide variations possible in making
such measurements because of control variations, consideration is
being given a suggested plan to repeat at least some of these measure-
ments. To do this will require moving the mobile units to an area
more readily accessible than they are in their selected locations.
Spare lamp bulbs and extra film casettes were supplied for use with
the Dumont cameras.
2. Trips:
A trip was made to Washington, D. C. on 30-31 July 1956 to discuss
the project with personnel concerned.
3. Expenses:
There were no unusual expenses during the period included in this report.
Distribution: 3 cc
1 cc - file
SECKEr
roject Eng neer
LNTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
,?
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7 STAT
'
For Classified Material Sent to
? U.
ma era
receipt
Ng 2618
Date: 1 Ave* WA
STAT
SiliPPed by
de
Originator
da
Item No.
Copy No./Nos.
Short Title
Date
Classification
1
311
Ur. & 00 81wisd 111
I Aug, 2,956
semi STAT
2
3 410114
&2 00 Wouss
USK 4212116
1 dog, 1956
Semi
STAT
flitasd PP
STAT
I have personally received from
the classified mate-
nal described above. I assume responsibility for safe handling. storage and transmittal elsewhere of this material
in accordance with existing laws and regulations.
Signed
Date
STAT
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part -Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
. - L.Utit I
Attention:
Reference:
Dear
Status Report,I
Task VI,
1 August 1956
311
Attached is the status report for Task VI for the period 5 July -
5 August 1956.
Except for minor activities as listed in the report, there was
little done at the station. However, there is considerable pressure
being put on the manual. Several sections in draft form prior to
any editing and without the necessary continuity were left with you.
We are complying with your request regarding more emphasis on the
equipment time delay.
I do hope that an opportunity will be given to follow through
on making additional equipment time delay measurements as discussed
during our meeting.
With kind regards.
NS:ar
cc: Orig. & 1
Attachments: 3 cc Monthly Summary
SECRET
Sincerely yours,
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
50X1
50X1
50X1
Declassified in Part- Sanitized Copy Approved forRelease2014/01/15 : CIA-RDP78-03424A001300090003-7
SECRU
Memorandwas Contract
Subjects
Task Tr
Fourteenth Status Report
Periods 5 Mr/4 June, 1956
4 June 1956
1. Project Studys
A thorough check has been made of the individual equipments, particularly
the master control unit and the transponder unit to make certain of
their correct performance. This is preliminary to assembling the units
into the system preparatory to the initial time delay measurements.
A few minor changes more required following these checks. For example,
an undesirable feed-back was experienced in one of the transponder
units which was eliminated through the use of a shielded wire and same
rearrangement of the wiring. Other problems of a similar nature were
encountered, none serious, but it did require some time to clear the
problems. These have all been finished. Initial time delay measure-
ments have been started. It is expected that these measurements will
be completed by 12 June. Allowing a few days in 'which to clear any last
minute problems, it is hoped to ship the trailers for the master station
and the slime station about 14 jun. 1956.
The few remaining details of the antenna system were cleaned up. Housings
for the antenna coupling units were completed together with the mounting
details.
A thorough review is being made of the original concept of the system
which will include & detailed operational analysis of the individual
units. In addition, a thorough analysis has been started of the time
measuring techniques and interpretation of the photographic records of
the system operations.
2. Wel
There were no trips made during the period covered by this report.
3. !Xpeneess
There were no unusual expenses during the period covered by this report.
Distributions 3 cc
1 cc . file
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Memorandums Fila Can traet
SECRET
Task FT
Subjects Thirteenth Status Report
Periods 5 April - 5 May 1956
2 May 1956
1. Project StudY1
The modifications of the KW amplifiers to enable then to be operated
on the recently assigned frequencies have been completed. The trans.
mitters are now complete including not only the changes required to
meet the operating requirements frequencromise, but also such changes
found desirable in the keying circuits. The operating characteristics
of the transmitter are improved as a result of the keying changes.
Before these changes were made, there was an objectionable transient
present in the transmitter output, most serious in the follow through
of the keyed pulse, manifesting itself as an overshoot having the
characteristics of a damped oscillation but also present to a lesser
degree in the rise of the pulse. With the changes introduced, these
transient effects have been eliminated. A further improvement has re-
sulted from the changes made to fit the transmitters to the proper fre-
quencies. These changes have lowered the "Q" of the tmned circuite
somewhat, thereby enabling the transmitter to handle a broader band-
width than it could before these changes were made. The peak pulse and
peak carrier output now coincide. This is a considerable improvement
in the operating characteristics.
The transponder units have been modified in order to improve the S/N
ratio. These changes involved a slight rearrangement of circuits,
addition of an amplifier stage which is used to key a bistable multi.
vibrator. A threshold control has been added to provide means to ad.
just to the best sensitivity above the noise level. The combination
of the amplifier stages effectively limits the noise and enables the
threshold to be set for a signal level which is weaker than would be
possible without them.
The output of the bistable multivibrator is used to trigger the pulse
generating multivibrator for the return pulse. This pulse shape gives
an easily distinguishable pulse for film recording.
The transmitter output has been measured with the transmitter properly
loaded and indicates an output approximating 700 watts.
Propagation studies were continued. Results of this activity were re-
ported in part in a letter dated 13 April 1956. These results deter.
mined from the CRPL predictions for the period of interest indicate
that limited useful service may be expected using the assigned fro-
quencies and over the proposed circuits. Further results of thee*
studies are shown on the graphs enclosed with this report. These re-
sults indicate the LUIZ and expected field strengths using the system
as laid out.
61:CHET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
orilDCT
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
- 2..
The LUMP curves hare been determined for two different noise grades.
The normal noise grade for the area of interest is 3. Homier, this
is under normal ionospheric conditions free of disturbances. At the
present time of unusual solar activities and disturbed ionospheric
conditions, this noise grade may vary radically. For this reason, a
second curve was plotted at the next higher noise grade. In making
these determinations, the service factor used was quite severe. In
the absence of any precise information, this had, of course, to be an
assumption. Possibly the service factor may actually be less severe
than assumed. This will be determined after the system is in operation.
A curve of expected field strengths with the transmitters operating on the
assigned frequencies and delivering 650 watts into the antenna is enclosed.
2. Tripes
One trip was made, during the period included in this report, to discuss
the project status with the parties concerned.
3. Expenses:
There were no unusual expenses during the period included in this report.
Mier
Distributions 3 cc .
1 cc . file
oject Ftj.n
Attachementss 3 sets propagation curves
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
11T4
?
'4)4404-4*Ali 47.1/ 4
/11?7441,0"9'
_
14-
_
?
JT
? -
1
!
1.. ---
L i
I
?--
4
-H 1
--
- -
la% 0.6
it".1 "i?O"
iI
_
?
"Ise
_t-
_
. -
h
3
?r 12i ! H
f
- - t-r- t t
21
,
_
;

T 4 44'
--, t :.---I-- I-4-- 4- _il-_-_,_.1 --I ?
il ' --4._ -T
-t--1_ L-7.---1-------,- --I-
1 --, t___1._
r 1
!
I
T-1 ,f
?
7
3
?
-
,I7li".7177
; :14
1r-?
f-T 1IH THH
- _ _ 1_ _
C1? ?r-
1
i I
I
*--? ? ?1
4_'
?
11-
_
IT;
2
1
-r-
H ? I ?
! +- ?
_
It 71 i
!
1
A F.A2d.z.v /irk.
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
fl
Ask
? MULE
? Milltidill?a? IIEMEMIMIEd? ?EprE1.111131.1 ..
arm.. ...... ati.,.....,,,I......L.ijI .1?,...m.,....?.
01 r IMP: Ai MI .!!' IrlW Pit 'TMITt
Nitra16901117-7-iiiiidl- -
dir_i_.: Allt 14M ill ' r 1 i 41?2:771,-11/4 ilr4 ir ..1. di _. NM
III ii?Mil ii?Ellbibb bid III Ma Si ? ME ?
11111
jbT
111110/9409Je,
?
1111VAPIE
r? TA Fkul
ii
EIMP????114
" 4110
-
t .
t
1
r-H
r
HF _
'1
1 r
i
1
i-H-
1-1--t- 1-- I
1- I---- t t- ; t 7 r-r
-1- +
, -1_1 ; _1_, t_t__
4---r , ---', i '
-
- '1--1
_
-4-i --;
1.
'14r
'
Ft
1
-E:
'
-T-1 11-1
ArRil Lit /dirt,
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Memorandum
Subjects
File. Contract
Task V/
Twelfth Summary Report
Period, 5 March 1956 E. 5 April 1956
5 April 1956
1. Project Studp
Three frequencies have been assigned to replace those originally assigned
and which, because of heavy interference, had to be abandoned. The new
frequencies ars:
1.
2045 ko
NCS
2.
2615 kc
Slave
3.
3165 kc
Slays
Crystals were obtained for both the transmitters and the receivers. The
transmitter exciter units have all been modified to operate at these fre-
quencies. Only the 2615 ko gave any particular problem with the exciter
unit, but this has besn solved and all exciter units are operating at
these frequencies. To modify the exciter unit to operate at 2615 Ito,
additional capacity me added in the plate circuit of the 6CL6 tube. /n
addition, the coil in the plate circuit of the final amplifier was re.
moved and a new coil inserted with the proper inductance. This change
limits the frequency range of this exciter unit to this particular fre-
quency. The schematic is being prepared incorporating these modifies.
time. The 1 RW amplifier offers more serious problem. The modifies.
Wins are being made but certain physical changes have to be made in the
components before these modifications are completed.
The transmitters wore also modified to permit a mere effective keying
technique to be used which will permit a mere efficient operatien to be
realised, This modification also resulted in a cleaner pules modulation
in that it has removed a slight follow through transientsehichwas present
with the original keying system.
Refinements have been made in the master control unit which has resulted
in a cleaner mars positive type of operation. A schematic of the Mister
Control Unit as used at present is attached.
Further studies have been made of propagation irregularities which might
be encountered. Several photographic records have been made indicating
the presence of such, but until further studies have been completed thee.
cannot be positively indicated as such. A continued study of expected
propagation conditions based upon the CRPL periodic predictions is in
progress. An increasing concern is felt regarding possible NIP layer
propagation problems in the coming months ahead. It is also realized
that the uncertainties of the 071 layer for the particular operation
with leach this project is concerned rules out its use.
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
Declassified in Part- Sanitized Copy Approved forRelease2014/01/15 : CIA-RDP78-03424A001300090003-7
2. T....ri.zs
Two trips were made during the period of this report to discuss the
project with the personnel concerned.
3. &Pongee*
There were no unusual expenses during the period of this report. It is
noted that the antenna supporting towers for the MCS and one slave were
shipped during the period of this report.
NS tar
Distributions 3 oo
1 oe rile
Attachments;
3 cc Master Control Unit Schematic
dated 26 March 1956
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7 50X1
- 1-1
4 April 1956
7402
Attentions
References
Periodic Status Report.
Task TT,
Dear
Attached is the status report, our
5 March 2956 . 5 April 1956.
for the period
Tou will note that while there was no difficulty experienced modify.
ing the exciter units to operate at the reoently assigned frequencies,
there are some prOblese to accomplish this with the 1 KW amplifiers.
This is not serious, however, but will delay 1 to 2 weeks the initial
local systems tests. This is because the output coils must be changed
as well as certain other componente. Electrically this is simple, but
physically the space limitations make this operation somewhat awkward.
Hewer, a solution has been found which it is believed will make it
possible to complete the modification within 2 weeks.
It is hoped you have received the antenna towers and have been able
to go ahead with the installation without any problems. However, if you
do have any questions, we are, of course, available at all times to assist
you in anyway possible.
With kind regards.
NSsar
cos Orig. & 1
Attachs 3 cc Monthly Summary
SEuki
Sincerely yours,
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Memorandum: File.
Teak VI
Subject: rleventh Summary Remit
Period 17 February 1956 - 5 March 1956
5 March 1956
1. Project Stain
Four frequency bands were suggested as areas in which frequencies may
be found to replace those previously assigned and found to be occupied
'with other services.
A general search was conducted during si four day period with daily
operation between 0830 hours and 1645 hours. The results of this
search are listed.
A. 2000 - 2065 kcs.
For all practical purposes this band DS clear as there lees no
particular activity noted except at 2000 kcs. Some slight activity
has been noted at infrequent intervals at 2038 and one or two other
greasy but none of these are considered serious.
B. 2105 ices . 2335 kcs.
In this bend there were several frequencies in quite active
services namely 2107 km, 2190 km, 2300 km and at 2327 kcs. The
other areas within this band were found to be quite clear.
C. 2505 km; - 2855 kcs.
This band appeared to be quite active throughout.
D. 3155 kcs - 3240 kcs.
At 3160 koss 3180 kcss 3200 kcss 3215 kcs and 3240 kcas there was
considerable activity's *otherwise the band was clear.
:1
A suggested frequency, 2065 kcsoms re ted as the one to be used at
the master stations to be received at the slave. Also the this
might use 2615 kcs to transmit to the mas . Upon receipt of sugges-
tams a careful surveillance was instituted of the 2035 kcs - 2095 Ices band.
Activity of an intermittent nature vas noted at 2038 ices, which later
shifted to 2037 toss and a similar activity appeared on 2 March 1956 at
2050 kegs while one at 2090 kce previously reported disappeared. At the
same times a fairly steady activity of moderate intensity appeared on 2
March 1956 at 2040 kcs; otherwise there was no activity observed. Some
doubt had been expressed as to the practicability of using these lower
frequencies because oft
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
1. Transmitter opening frequency range.
2. Propagation using the 0E, laser and with the limited
transmitter poser.
The transmitter frequency range can be extended.
A study was made of the predicted propagation and it is not believed
that there will be any serious difficulties. A calculation was made
of the LUHF for the particular circuit using the Viking transmitter,
and this was determined to be 1.7 mc.
Improvements were made in the keying of the transmitter found desirable
following the recent tests. These improvenwnts are undergoing 50X1
test. The preliminary res ts are promising.
No further tests are contemplated using the vertical antennas to study
ground wave propagation and all effort will be concentrated on the
horizontal antennas and depending an "E" layer propagation. These
antenna systems are being installed at the slave station.
Time delay measurements cannot be completed until the operating fre-
quencies have been established.
2. Trips*
A trip was made on 23 February 1956 to discuss with those directly con-
cerned the status of the project. This discussion was held in
Washington, D. C.
3. EXpensees
There were no unusual expenses during the period covered by this report.
NS sir
Distribution* 3 cc ?
1 cc - file
SEC 47i
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
;.?
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
5 March 1956
7060
Washington, D. S.
Attentions
Reference $
Dear
Task VI,
Attached are three copies of the eleventh status report
covering the period 17 February 1956 to 5 March 1956.
You will note that we are erecting the antenna support
towers and getting everything in shape to move as rapidly as
possible as soon as we are advised regarding the frequencies
to use. It is hoped this information will be made available
promptly.
With kind regards.
Maser
Oct Orig. & 1
Attschs 3 cc Monthly Summary
Sincerely yours,
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
T
21 February 1956
Memorandum File, Task VI,
Subjects Tenth Summary Report
Period, 5 January 1956 - 17 February 1956
50X1
1. Project Study*
The vertical antenna material was received and installed at the field station.
The impedance matching units to couple the output of the transmitter to the
antenna were installed and tested. With the particular antenna systems used,
a match at 4031.5 Uss was obtained, which gave a 111 SWR, at 3177.5 ko a
1.381 SWR was obtained. These two frequencies had been selected from the
three assigned frequencies for use during these particular tests. Tests were
conducted lustily preparatory to the actual field tests to determine the
comparative equipment time delays and also to insure the proper functioning
of the equipment proper. There was no difference noted in the time delay
through the equipment operating at the one frequency compared to the time
delay through the equipment operating at the other frequency. Item there.
fore assumed that any difference in between the time of arrival of the signals
would probably be due to propagation. However, certain irregularities did
appear in the operation of the transponder unit used at the remote stations.
Modifications were made to correct this situation. The schematic of the trans-
ponder circuit as used is shown on the drawing dated 17 February 1956. It
should be noted that this circuit supersedes the schematic dated 28 Decenber
1955, which was included with the Ninth Summary Report.
The tests as planned and carried out required the simultaneous operation of
two transmitters keyed with the common pulse source. Some difficulties were
encountered paralleling the keying operations through the master control air-
euit. However, temporary modifications were made to permit the desired
operation without affecting the basic characteristics. Installation of the
antenna systems and equipment was made at on 3 February 50X1
1956, and actual tests started on 6 February 1956. The distance between the
Field Station and the installation is approximately 60 miles. A 50X1
schedule which had been prepared in advance included precautions to reduce
to a minimum actual radiation time to avoid possible complaints of interference.
A series of initial pulse transmissions were made over a short period of time
to enable the equipment to be accurately Checked as to tuning and proper
operation. Following the initial test transmissions, which were on the air
less than 3 minutes total, a series of pulsed transmissions were carried on
the two frequencies siemltaneously. Various pulse widths, repetition rates
and various other combinations were used during the tests which were conducted
over a period of several days. Unfortunately, the presence of other operations
in the immediate vicinity of the test frequencies introduced such interference
it was not possible to obtain any meaningful data. Some records were taken
of the interference. There in a MARS circuit on 4025 kc which gave a signal
of some 60 db reference 1 microtolt signal which blotted out any possibility
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
2
SECRET
of our signals on 4031.5 kc. With the pulse used, a bandwidth of 48 kc is
required and accordingly, it was necessary to operate the receivers at maxi-
mum bandwidth of 13 kc. With a broader pulse narrowing the bandwidth require-
ments, there was no improvement. At 3178 there was a teletype circuit in
practically continuous operation making our circuit on 3177.5 useless.
Because of the heavy interferences noted, a general search was instituted to
locate possible clear channels. The results of this search are shown on the
attached charts indicating conditions as they are at the Field Station at
present. Similar searches should be made at the two other proposed sites
and from the combined results, it is hoped that some useable frequencies may
be found.
The tests established that the transponder circuit is satisfactory-within the
limits of the test. It must not be overlooked that there were no return
transmissions, but the results of the laboratory tests indicate that this
control feature is satisfactory in the transponder unit.
The tests also indicated that the keying of the transmitters should be further
investigated as there appears to be a delay in buildup of full output. This
matter is now being studied and it is expected that the desired improvements
will be incorporated and tested by 27 February 1956. It is expected that the
two trailers and accessories such as the towers for the antenna system will
be ready to be moved to their respective final sites 'within three weeks. This
depends on having the necessary new operating frequencies assigned on or before
28 February 1956.
A schematic of the Master Control Circuit is attached for information.
In considering possible new frequencies for use in this system, it was considered
desirable not only to conduct the general search but to review briefly LORAN
experience.
The experience of LORAN has indicated that for other than ground wave operation,
only the "B" layer is sufficiently stable and reliable the year around for
dependable results. Average error due to variability in delay increased
slightly in comparison with ground wave. It was found in LORAN operations
that this error is in most part compensated for by the increased geometrical
accuracy resulting from the longer leg lengths between the sites permitted by
*IP layer operations.
Ground wave transmission by. LORAN feeding 100 KW into a vertical antenna was
limited to 100 miles over land, 500 miles over sea water. The average errors
are law. Considering the limited overland range of 100 miles with 100 KW
antenna power, it is easy to understand the difficulty, even at 60 miles, to
obtain satisfactory operation with less than 1 KW antenna power!
It is believed advisable in the system under consideration that the tests be
confined to "1! layer transmissions and that no further efforts be spent
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part- Sanitized Copy Approved forRelease2014/01/15 : CIA-RDP78-03424A001300090003-7
? 3 -
t
using ground eaves. Using the "E" layer should make possible greater separation
between the master and slave stations resulting in greater geometrical accuracy.
The antenna systems to be used are designed to use sky wave transmission, and
it is expected that the assigned frequencies will be in the 0E* loor range,
between 2. and 3.5 me.
Considerable thought is being given to possible accuracies to be expected using
the existing equipments, time delay measurements, etc. This analysis is not
yet complete but is expected to be completed by 28 February 1956.
2. Dams
Field tripe were made vale the field tests were in progress during the period
covered by this report.
3. Expensees
Except for the materials required for the field tests, there were no unusual
expenses during the period covered by this report.
Tatar
Distributions 3
cc- file
- cc -
Attachments, 3 cc Freq. Search Chart 8 February 1956
3 cc Freq. Search Chart 9 February 1956
3 cc Transponder Schematic 17 February 1956
3 cc Master Control Schematic 2 February 1956
SE WEI
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
beclassified in Part- Sanitized Copy Approved forRelease2014/01/15 : CIA-RDP78-03424A001300090003-7
SL6RE.
Memorandums
Subject:
File,
Ninth
Period
Task in,
January
Is January 1956
50X1
Summary Report
. 5 December 19554
1956
1. Project Study:
There have been delays in the delivery of the vertical antenna material to be
used in the investigation of the possibility of using ground wave propagation.
The material was originally promised for delivery in time to permit the tests
to be started about 19 December 1955. It is now expected that these tests may
be started about 16 January 1956. A tentative site for the outstation to be
used in the tests has been selected at about 60 miles east of theF?field 50X1
station. All towers, wire and insulators, and other antenna accessories have
been received for the horizontal antenna systems to be used in the final tests.
A folded dipole antenna system will be used initially, having an input impedance
of approximately 300 ohms. The antenna system layout has been completed.
The three impedance matching units to oouple the output of the transmitter to
the antenna have all been modified to permit operation at the three assigned
frequencies. SWR measuring units have been received, one for each station to-
gether with low pass filter units to reduce possible radiation, particularly
such as might occur at the higher frequencies. This precaution will, it is
expected, eliminate possible interference with television receivers.
Results of tests made at the assembled control station indicate the need for
shielding and proper distribution of the interconnecting eibles. There appears
to be heavy interference from the unit pulsar wtich is serious. However, in
observing the precautions noted, this problem is apparently solved.
The control units incorporating the transponder circuit for use at the slave
Stations have been assembled. Each control unit is complete on a single chassis
and includes not only the transponder circuit but the carrier controlled relay
circuit together With the required power supply. A schematic of this unit is
attached hereto. One unit is ready for use while the other is short the front
panel. The functions of the slave station control unit are:
1. In response to a start signal originating at the master station, the camera
drive is turned on at the slave station.
2. Automatically distinguishes between a true start signal as received from
the master station and other undesired signals.
3. Following the reception of the true start signal the transponder proper
is activated. A now pulse is generated for each pulse fed into the trans-
ponder. Using a 21)21 thyratron in the circuit together with a control
switch on the front panel, the transponder may be set for either a single
pulse or ten pulse operation.
t
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
beclassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
-2.
SEutiET
Some signals which may be received at the outstation are:
1. Static bursts:
If a static burst is less than 1/3 second in duration, no response is
noted in the transponder.
2. True start signal:
This signal is a pulse of approximately 0.6 second duration and such a
signal 11111 start operations at the slave station.
3. Other carriers:
A carrier on approximately the same frequency as the true signal, if on
longer than 2.5 seconds, will not start operations at the slave station.
The only signals which will give false indications at the slave station are
pulses with durations between 1/3 second and 2.5 seconds.
2. 11:11V
NO trips were made during the period covered by this report.
3. Expenses:
There *were no unusual expenses during the period covered by this report.
NStar
Distribution: 3 cc -
1 cc - file
?+1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
Washington, D. C.
Attention: _
Referencei
Dear
Task VI
is January 195.6
6372
Attached are three copies of our ninth status report covering the
period 5 December 1955 . 5 January 1956.
It is regretted that there has been an unavoidable delay in conduct?
ing the preliminary tests mentioned in our letter 0 6077 dated 30 November
1955. Delivery of same essential parts has been held up causing the delay.
However, these parts should be here within a few days and as soon as re. -
ceived? we are prepared to start immediately with these tests.
The work on the trailers and these special teats has out down appreciably-
on the test period which will be available for the final tests if we adhere
strictly to the specified date of contract termination, namely 17 April 1956.
It is doubtful whether we will be able to collect sufficient data within
such a short time to be of much value in the oval...all evaluation expected.
Under these circumet&nces it is suggested that the contract be extended to
run at least until 1 June 1956, preferably until 15 June 1956. In request.
ing such an extension of time it is not expected that any additional funds
will be required.
With kind regards.
DiSter
CC, Orig. I
Attach, 3 cc Monthly Summary
Sincerely yours,
..?
0, 143 ET
Project Rhgineer
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
OLUiaL:
30 *member 1955
Memorandums File,
Teak VI -
Subjects Eighth Summary Report
Period 5 November 1955 ? 5 December 1955
1. Project Studr
(a) Expected, propagation conditions for the period remaining to completion of
the project have been investigated. The MU? and MT were calculated for
January 1956 based on the CRPL predictions. The results of these calculations
are shown an the attached chart and plotted on the attached graphs. It will
be noted that the expected propagation is not tee favorable for ttoilktique,neiss
assigned except possibly under some favorable conditions sueh as the kg ;Ayer.
However, experience has shown that for only about 50% of the time, perhaps even
for less time, do the precise conditions as assumed in making the calculations
exist. Unfortunately the variations found under actual operating conditions
generally favor the higher frequencies and as the assigned frequencies are al-
ready on the low side, it is quite possible that this condition may be worsened.
This means that the signal will be some weaker than has been estimated. It has
been determined using the antenna system considered, namely a folded dipole,
and a transmitter with an output of about 1 kilowatt that the field strength at
the proposed receiving station site will approximate 1000 microvolts per meter.
This figure in based on the propagation conditions as predicted. It is not
known what the local noise level is at the receiving site, but it is doubtful
that this noise level will be serious. Assuming that this be so, the calculated
field is extremely favorable. It is believed possible to establish a reliable
circuit with a signal level of the order of 100 or so microvolts per meter, that
is, at 1/10th the calculated field. It is believed that fading swings of 20 db
can be tolerated.
The foregoing is based on the assumption that the propagation will be exclusively
by skyways, that is, ionospheric. However, it is believed desirable to inves-
tigate the possibility of using ground wave propagation and accordingly, tests
will be made to determine the practical lurking range depending on ground WM
propagation. For this purpose use will be made of a vertical 1/4 wave groUnded
antenna. This type of antenna has a very low angle of fire with an almost total
&booms of high angle radiation. Of course, every effort must and will be made
to eliminate any high angle radiation as the presents of such high angle radia-
tion together with a low angle radiation can lead to serious interference
patterns which must be avoided.
The results of the proposed tests may indicate a limited range which will give
a very short base line. This will probably so restrict the possible hyperbolic
pattern resolution that the system may be quite impractical using ground wave
propagation with such limited power as is available. An analysis will be under-
taken of the resolution of the hyperbolic patterns using various base lines.
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X11
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
-2
I. T
sJ,L.UilL. I
IWO
(b) A master control unit VAS completed which combines the several individual
units used for control purposes on a single chassis. This unit is at the con-
trol station. The unit has been tested and found to be satisfactory.
The impedance matching unit to couple the output of the transmitter to the
antenna has been received. The results of preliminary tests indicate that the
unit is satisfactory. Control circuits for the accessory equipment such as
the camera at the slave stations have been developed. In addition* a control
circuit for remote operation of the slave station transmitter has been developed.
The components for these circuits are being assembled on a suitable chassis and
it is expected will be tested and installed on or before 12 December 1955.
(c) The two remaining Dumont cameras have finally arrived, although there was
a 5 months delay in delivery from the original delivery date promised. These
have been tested and bund to be satisfactory. Two heaters are still short
although they are 8 weeks overdue according to the last delivery promise.
Assurance has been given that they should arrive not later than 8 December 1955.
Water tanks and developing sinks are being installed in the trailers.
Antenna material has been ordered for the preliminary tests. This material
comprises a number of vertical telescopic masts. Wire for the horizontal an-
tennas is available, and towers to support these antennas should be available
by 10 December 1955.
(d) It was mentioned at a mee ing in Washington on 1/4 November 1955 and again
at the meeting held at the field station on 22 November 1955 that security 50X1
regultions will not permit access by personnel to the two sites selected 50X1
for two of the stations. As this pro ec is largely developmental, this situs..
tion made it impossible for to properly complete the project. In discussion 50X1
of this situation, it was decided that other sites accessible to 50X1
may be used with the understanding, of course, that comparable base Ill:: will
be established in selecting the new sites.
2. Tripes,
One trip was made to Washington on lit November 1955.
3. Expenses:.
There were no unusual expenses during the period covered by this report.
Distributions 3 cc .
1 cc - File
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
5.6
5.6
5.6
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Front
MUF-01,47 WORK SIM? FM PA I15
Tot Washingtart, r. C. Distance,
4aK) KM
OR LFSS
Zone
Date
Predicted
20 November 1955 ?
for
January 1955 STAT
Note: Al].
.?uencies are
ales.
-
2
2
2
2-011
OCT
2000.
2000.
zero-
4000-
for
_,f for for 2000-
far
for
for
for
for
for
fir
mut
out
oaf
oaf
Path
Path Path our
Path
Path
Path
Path
Path
Path
NEM 1111011 MEM MEM MIN 1.113111111111111 NM* MEI=
00
ba
2.0
2.$
111111kAll NUNN
0,5
06
00
1112211123=1123111111111.11111111 111111111161
of tea.
b-14.0 .85
1111.1110011 18.00 2.75
10.0
.0
ft.8
4.0
Th
of kl
.96
no.
Effec'
4.0
MINN MINN MSS INNS MINI MINN= MINIM MIME
114
16
2.5
2.6
0
10
20
22
1.7
/9
21
23
3.4
3.4
3.2
/21'
34.6
?
11.6
17.0
17.0
24.2
16.0
12.11
2.6 .0 t,t,
2 ii.6
lb' ?
3.0
9 t
?
111111111111011111111111111611111111101
IMEA
?
?
? ?
MEM
WAIN
WENN
3.5
3.14
3 45
3 65
2.94
.45
3.59.
f.15
10.6
3.8
14
3.2
]).45
2.94
3.13
?
24.6
6.0
7
0
20.0
29.8
4.6 3.e
5.6
3.6
3. 7,3 7.3 6.6
7.3 0.6
14 *13
9.2
.65
8.9
3685
3.t5 7.15 9.2
7.01 .2
e.6 25.7
4.4 0
9.0
3.5 .4 9.0
7.65 9.0
?
?
7.5 2.0
3.6 105
/.7
1.0
1.55 6.5 7.7
6. 7.7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
10
Date: Nov. 21, 1955
to Washington, D. C.
Distance
Predicted for Jan. 1956:
0 MUF for the Path by Regular Layers.
(Highest Frequency of E, Fp F2)
? OWF for Path: Regular Layers
00
02
04
06
08
10 12
11
16
18
20
22
24
Gmt.
19
21
23
01
03
05 07
09
11
13
15
17
19
Local
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
STAT
STAT
STAT
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Nam/
10
Date ? Nov 21, 1955
tr Wh tnn
Distance -
Predicted for Jan. 1956
MUF for Path with IncluFaon of Effects
of Sporadic E
0 MUF for Sporadic Es
I I I
MUF with Es Inclusion
Es MUF for Path
00 02 04 06 08
19 21 23 01 03
10 12
Gmt
05 07 09
Local Time
14
16 18 20 22 24
11 13 15 17 19
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
STAT
SIAI
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
?
10
8
(.;
6
? I-I
(1)
o-'
a)
4
2
Date: Nov 21, 1955
Wa ghincrtnn T1 C.
Distance -
Predicted for Jan 1956
0 E Layer OWF for Path
.0
I
0 0
02
04
06
08
1 9
21
23
01
03
10 12
14
16
18
20
22
24
Gmt,
05 07
09
11
13
15
17
19
Local Time
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
STAT
Siii
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
btunLi
28 October 1955
Memorandum: File,
Task VI -
Subject: Seventh Summary Report
Period 5 October 1955 - 5 November 1955
1. Project Study:
Crystals for both the transmitters and the receivers for operation
of the frequencies specified in the letter dated 7 October 1955 have
been received- The frequency range of the transmitters has been
extended and all necessary modifications completed.
An automatic ten pulse gate circuit was developed and completed to
permit the transmission of ten and only ten pulses. A brief des-
cription of the circuit developed is included herewith.
Ten Pulse Gate Circuit
The output from a General Radio Unit Pulser(positive pulses) is
amplified through a single stage 6C4 amplifier. The inversion in this
stae is necessary for the proper operation of the transmitter. The
output of this stage is coupled to the input of a Hewlett-Packard AC-4A
decade counter and also to the transmitter through a low pass filter.
The decade counter counts the pulses and upon the receipt of the tenth
pulse, it has generated an output voltage of about 80 volts. This
tenth pulse is used to fire a 2D21 thyratron which has a common cathode
resistor with the 6C4 amplifier stage. When the 2D21 fires the cathode
of the 6C4 is raised to about 150 volts which is quite sufficient to
cut off this tube. This effectively gates the transmitter so that
only ten pulses are transmitted.
The cathode of the 21J21 thyratron must be opened momentarily before a
second train of ten pulses can be transmitted. It is not necessary
to recycle the decade counter as the tenth pulse automatically returns
the counter to zero. The circuit used is:
50X11
ornnrT
Declassified in Part-- Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
- SEC- ET
A circuit is being developed to control the automatic operation of
the slave stations from the control station. Preliminary tests give
promising results and it is believed that only minor modifications
may possibly be necessary to complete this unit. The system devised
requires that the operator at the control station press a button
which activates the local transmitter. The control station transmits
a blank signal for approximately i second. This transmission auto-
matically sets the cameras in operation at the slave stations.
Approximately 1/3 of a second later, a second circuit closes which
initiates the transmission of the series of ten pulses. Provision is
made to include facilities which will permit the return by the slave
station of either the entire pulse train or single pulse to the con-
trol station. Thl.s feature is desirable because it does permit an
accurate check to be made of the system operation and there may be
periods during which there is heavy atmospherics which might obliterate
a single pulse but allow enough of the series through for useful
observation.
It is planned to have local systems measurements completed in time to
permit initial field testing to be underway at the selected sites by
about 19 December 1955. However, this schedule is somewhat dependent
upon the early receipt of the necessary priority for the delivery of
the Dumont cameras. This priority was expected in September 1955 but
for reasons not understood has not yet been received.
2. Trips:
No trips were made during the period covered by this report.
3. Expenses:
There were no unusual expenses during the period covered by this report.
Distribution: 3 cc -
1 cc - File
SECRET
Project gl eer
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
' Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
SEC, :T
0
28 October 1955
5750
Washington,
Attention:
rence:
Dear
iask JI
Attached are three copies of our seventh status report covering the
period 5 October 1955 ? 5 Tovenber 1955.
The various control circuits such as the ten is gating circuit,
signalling circuit to be used at the control station to operate the
slaves automatically have all been designed and the preli-min.ary testing
practically complete. We plan to hae overythAn: completed ane_ available
to start the field installations early- in December. This information
is mentioned particularly as we expect :you to provide the drivers for
the two trailers in accordance with the arrangements made with you and as
agreed upon by you.
We have not yet received the priority you are to send us without which
we will continue having difficulty to ohtain the two remaining Dumont
cameras. Cf course we continue to press Dumont and perhaps we will succeed
in obtaining delivery, but it is uncertain. It would be appreciated if
you would expedite the priority for us.
delayed again in completing shipment of the, heaters for the
tral ers u this is not a serious matter and we ill not delay because of
this.
With kind regards ?
cc: Orig 1
Attach: 3 cc ? Tronthly Summary
SECRET
5:1.ncerely,
Project Ehp:ineer
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
SECRET
Memorandums File, Task VI -
Subjects Sixth Summary Report
Period 5 September 1955 - 5 October 1955
29 September 1955
1. Project Study:
All transmitters are in operating condition as are the receivers, timers
and associated equipment.
One of three Dumont cameras has been received. An inspection and tests
made of the camera indicate that the camera is entirely satisfactory.
The supplier has not yet completed shipment of the materials required
to finish the modifications of the trailers. Assurances have been given
of complete shipment within 10 days.
A study has been made of the factors affecting the signal time delay
through the equipment. Variations in the time delay are due largely to
improper tuning. The system is apparently sensitive to changes in the
tuning, even slight off tuning in the receiver changes the time delay
25 to 30 microseconds, an error of 5 miles. This appears to be unavoid.
able with the particular equipment because of the bandwidth limitation
of the receiver. However, this problem is not considered serious for
this particular project. Operating frequencies have been agreed upon
verbally, but operations cannot be made until a written authorisation
is received.
2. ItliV
No trips 'sere made during the period covered by this report.
3. :Venoms:
There were no unusual expenses during the period covered by this report.
Distributions 3 co -
1 00 . File
rroject zngineer
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
Declassified in Part- Sanitized Copy Approved forRelease2014/01/15 : CIA-RDP78-03424A001300090003-7
aturitr
Washington, D. C.
Attnt
Reference. Task TE,
Deer
September 29, 1955
5511
Attached are three copies of our sixth status report oovering the
period 5 septembeir 1955 - 5 October 1955 of the work dons on Task VI.
We are ready to make field tests but should have from you critten
authorisation to use the frequencies agreed upon before we actually go
on the air. The reason is given in our letter 5490 dated 28 September
1955 teF7with a copy for you.
supplying some of the material required for the trailer
medileaslon, have been inexcusably slow in completing deliveries but
even with a shortage here we can go ahead.
The operation, as you know, appears to be over sensitive particularly
to tuning. Further study of this problem indicates that the limited band.
width of the receiver is probably the most important factor. U. do not
believe, however, that this problem is too serious for this particular
study.
With kind regards -
NS/er
cc. Orig & I
Attach. 3 cc ? Monthly Summary
S.FERET
Sincerely,
Project Engineer
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Memorandums File,
SECRET
31 August 1955
Task V/ -
Subject $ Fifth Summary Report
Period 5 August 1955 - 5 September 1955
1. ,Projark.S.
Tenure of a switch in one of the kilowatt amplifiers ham temporarily
put this unit out of service. A replacement has been ordered and is
expected to be delivered before 10 September 1955.
Racks on which to mount the receivers, timers and associated equipments
were received. These have been assembled and the equipment mounted.
The various necessary cables were assembled and installed.
Measurements were made of the overall time delay through the initiating
transmitter, through the remote receiver, through the remote transmitter
back through the receiver at the sourest. It was found that this overall
delay is 235 microseconds. This does not include the actual space props.
gation time. There is a distortion present in the finel received pulse
which is due to the bandwidth limitation of the receiver. However, it is
not believed that this distortion will affect the overall operation of
the system nor its usefulness. The material required to complete the
modifications being made in the trailers was received. The actual work
modifying the trailers is expected to be completed before 12 September 1955.
The Dumont cameras originally scheduled for delivery on or about 10 August
1955 were delayed and shipsent is now expected before 9 September 1955.
Local systems tests over a 15.25 mile circuit are being held in abeyance
awaiting receipt of the necessary authorisation to be on the air.
2. IdEV
No tripe were made during the period covered by this report.
3. Expenses:
There were no unusual expenses during the period covered bythis report.
Distributions 3 cc
1 cc - Contracting oficer
1 cc - File
SECRET
Project Engineer
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
SECRET
Washington, D. C.
Attn:
Reference: Task VII
Deag
August 31, 1955
5254
Attached are three copies of our fifth suranary report covering
the period 5 August 3955 5 September 1955,
The damage found in the Idlommtt amplifier noted in our
letter #11981, dated 2 August 1955, was repaired. Unfortunately
there was a recent failure in a switch temporarily putting the
unit cub of service. This is mentioned in the report*
System tests over a local circuit are being held up until
you send the authorisation from the FCC to be on the air.
This will remind you that we are expecting you together with
on friday, 9 September 1955. Please advies us of your ex-
pectec time of arrival and whether or not you wish hotel reserva-
tions to be mots.
With kind regards -
Sincerely yours,
!'ojest ng1near
cci Orig dt 1
Attache 3 cc- Monthly Summery
MSfiess
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Memorandum File,
SECRET
Task VI
1 Augmt 1955
Subject i Fourth Smemerr Report
Period 5 July 3.955 - 5 August 19%
1. itoject Study'
Two ace kilowatt Amplifiers were received thus completing the
total of three required on the project. Both units were re-
city-ed in slightly damaged condition but the broken parts have
all been replaced and the units tested. They were found to be
satisfactory.
The pulse distortion found in the receiving sqWpment and as
previously reported upon appears to be the result of interference
from the nearly pulse generating equipment. Reversing the pulse
character and improving the shielding has improved the general
situation.
A local test circuit has been established over a triangular system.
The distances are 10 to 15 mils*. This oircuit will, be used for
a preliminary system operation.
Measurements of the bandwidth of the transmitter output indicate
it to be somewhat in excess of 100 kos.
Two trailers topther with tractors were received an 26 July 1955.
It is expected that the required work on those trailers will commence
about 8 August 1955 and it should be completed within one week.
Time measurements as well as stability measurements were held up
to permit the necessary repair work to be made on the transmitter*.
2. Tripes
No trips were made during the period covered by this report.
3. 34Kmessi
There were no unusual expenses during the period amoral by this report.
Project Engineer
svsw
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Washington, D. C.
Attu*
Reference* Task VI,
Dearl
SECRET
August 2, 190
Attached are three copies of our fourth summary report covering
the period 5 Jay 1955 . 5 August 1955.
You mill note that two pieces of equivalent, namely the recently
ordered one Kilowatt Viking amplifiers mere received in a damaged
condition. Although it was a simple matter to repair these units, it
did take up some time preventing us from comapleting the time delay and
stability measurements mentioned in cnir third summery rePart?
Sincerely yours,
taneer
cc: Orig & 1
Attach* 3 cc Monthly Suaewiry
Wass
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1
50X1
Declassified in Part- Sanitized Copy Approved forRelease2014/01/15 : CIA-RDP78-03424A001300090003-7
SECHE.I
Memorandums File
Task VI
30 June 1955
Subject $ Third Sunman, Report
Atrial 5 June 195 5 Jar 1955
1. "reject
The one kilowatt power amplifier to be used with the Viking
transmitter was received,. Preliminary tests indicate that
the amplifier will be satisfactory and accordingly an order
was placed for the complete set of equipments required.
Slight modifications in the output circuit will be made in
the power amplifier to maks it more readily adaptable to the
particular antenna system.
Measurements will be made as to bandwidth occupancy of the
transmissions as soon as the modifications have been made.
Delay mesaurements were made on the receiving aptsm indicating
a time daisy of approsdasately 125 microseconds. In addition
there is a slight distortion introduced to the pulse in the
receiving system which although not serious will be more
thoroughly investigated. It may be possible to eliminate or
at least reduce this distortion by recording the output *head
of the audio output.
More detailed and accurate delay measurements are in progress
to determine the stability of the 'system.
The multivibrator unit is successful. A gating systma is now
being assembled. It is expected it will be completed and
tested by 20 JUly 1955.
A layout for the trailers was prepared and approved. It is
expected that the trailers will be available at by 15 July
1955. Preliminary systems tests made locally are scheduled to
take place during the 2nd meek of August 1955.
2.
A trip was mods 9 June 1955 and again on 29 June 1955 to discuss
the project with the project manager in Washington.
3. Expenses*
Two Viking one kilowatt power amplifiers and accessories were
ordered on 21 June 1955 at a total cost of 0437. Spare tubes
and other necessary items were obtained at an approximate total
cost of $100.
RFT.RFT
Pr ojoes zngLneor
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
Washington, D. C.
Attns
References TOR vis Project 45
Dear
June 30, 1955
4699
Attached are three copies of our third summmnrreport for the
period 5 June 1955 *5 Jai' 1955.
The method used in deli, measurements will be written up
separately and sent to you as requested. Measurements of the bend.
width of the transmission will be completed within the next ten
days, and the results forwarded to you at that time.
Consideration in being given to the question of modifying the
pulse transmissions for the reasons discussed during csu. meeting on
29 June 1955. As soon as our ideas have crystallised they viii be
presented for discussion.
cci Orig &
Attacht 3 ca Monthly StunlealT
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090003-7
50X1
50X1
50X1
50X1