RESEARCH AND DEVELOPMENT LABORATORY August 1966

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-02820A001200040015-8
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 8
• Document Creation Date: November 11, 2016
• Document Release Date: September 25, 1998
• Sequence Number: 15
• Publication Date: August 1, 1966
• Content Type: PERRPT

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August 1966
1. Laboratory travelers this month include Mr.
M TDY to _ for the purpose of installing the
25X1A9a 25X1A6b PD-1 predetection medium-speed base station receiving
25X1A9a system; o Harris-
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burg, Pa., for the purpose of visiting , in con- 25X1 A5a1
nection with the Laboratory case-to-case connector design
25X1A9a project; and to Philadelphia, Pa.,, where
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he visited in connection with minor
problems being encountered in the micro-miniature assembly
activity.
25X1A9a 2. Mr. , R&D Laboratory senior engineer, completed
a course in Digital Systems Engineering given locally by = 25X1A5a1
25X1A5a1 during this reporting period.
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3. Two new Laboratory engineers enterqd__on___duty is month. Mr.
have been as-
signed to the A&A unit for training prior to assignment to
design.
1. A second version of the HARK-l, 100 wpm Baudot coder/keyer/ 25X1A6a
transmitter is being constructed for the forthcoming
operational tests. The HARK-1 is the CK-36 brevity code
coder/keyer mated to the ASR-100 VHF transceiver. The new
version will have a simplified coder/keyer, designated CK/A-36,
mated to the ASR-100 and will differ from the original in that
it will only have six information switches instead of seventeen.
The electronic assembly, however, will be identical to the CK-36.
The CK/A-36 contains improvements which will be incorporated in
future CK-36's as well. These are: elimination of the coder
ON/OFF switch by the substitution of a momentary push-button
which will initiate transmission of the coded message without
the need for using the ASR-100's push-to-talk switch. Message
length has been shortened by the reduction of the activation
sequency to 1-N-T Figs. and by the elimination of the S-T-0-P
deactivation sequence. Both the original HARK-1 and the revised
unit will be used in the Lests.
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which makes a simultaneous monophonic recording if desired.
Improvements incorporated in the DD-2's IF converters will
result in recordings of increased quality, through the elimin-
ation of overloading in the IF converters. The DD-2 contains
two Racal RA-117 receivers interconnected for diversity
operation.
2. A design project for the development of secure voice/
facsimile terminal equipment received successful opera-
tional testing this reporting period. A system was
assembled for testing which demonstrated the use of the
KY-8 in a commercial cover installation. This system has
in uts both voice and facsimile equipment 25X1A5a1
The KY-8 was then interfaced with a prototype
gallium arsenide (Ga As) infrared communications system.
The system is very simple. It consists of a Ga As diode
(with optics and amplifiers) on the transmitter end and a
semiconductor IR detector (again with optics and amplifiers)
for the receiver. It has an information bandpass from 3 kHz
to 25 kHz. This was needed to pass the KY-8 signal.
A system test was conducted over a two- and a three-mile path.
Operation over the three-mile path was adequate but would not
have worked if degraded by weather. The two-mile path was
stable and operated during a moderate rain.
3. The design project, initiated in February of this year, to
provide a dual diversity medium speed receiving system was
completed this month. This system, designated the DD-2,
was delivered to the warehouse for shipment to - The 25X1A6b
DD-2 dual diversity receiving system is designed to add the
advantages of space diversity reception to the techniques
presently in use at base stations for receiving and recording
300 wpm Morse traffic. The DD-2 produces a stereo recording
in which phase relationships of signal and QRM at the separated
receiving antennas are preserved. Upon reduced speed playback
with a stereo BP/A-12 and stereo headphones, the operator is
greatly assisted in copying weak and fading messages. The DD-2
also provides an alternate channel containing a diversity switch
)4 A new project was initiated this month for the development of
the PD-2 medium-speed base station receive system. The PD-2
will combine and utilize to best advantage the features of the
DD-2 (space diversity reception) and the PD-1 (broadband pre-
detection recording).
The space diversity reception is accomplished through the use
of two interlocked Racal 117 receivers. Predetection record-
ings of the receiver IF's are then made on a two-channel re-
corder capable of a 100 kHz response. The 100 kHz recordings
are then played back through two interlocked tunable narrow
band VLF receivers with an output of 15 kHz. This output is
recorded on a high speed stereo Spotmaster and played back at
low speed on a BP-12 stereo playback.
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One system is being assembled with a targeted completion
11 -
5. A second prototype of the RR-59 agent receiver was completed
and delivered to OC-OS for operational evaluation. Prior to
this delivery, it was subjected to a cursory A&A evaluation
and it equalled or surpassed the first prototype in every
respect. The RR-4+9 is a 2-16 mHz agent receiver with its
own self-contained ten-channel crystal matrix. Physical
measurements are approximately 1 8" x _25/16" x 1 516".
Pending a successful operational evaluation, ten service
test models will be constructed.
6.
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1.
Six evaluations were published and distributed during August.
Seven other evaluations were completed and the reports written.
These are in process of being published. Six evaluations are
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presently in the testing phase.
0
2.
A breadboard model of a battery charger for the ASR-100 Nicad/
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batteries was developed by
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4
4
The unit is designed to charge four 1
.
-
volt battery packs at a 50 ma rate simultaneously. It is also
capable of accepting power line voltages from 90-240 volts at
50/60/400 Hz. One switch is required to switch input voltages
above or below 160 volts. Temperature range is 00 to 600 C.
The charger met all the above specifications with no malfunc-
tions. The unit has additional versatility in that outputs can be
paralleled to provide charging currents of 50, 100, 150, and 200
ma for various size batteries. One accelerated life test was
given the unit. The four outputs were tied together and a 7-
ampere hour battery was charged for 48 hours. The unit performed
excellently throughout the test and maintained a constant 200 ma
charge current throughout the test.
A previous unit had been checked and rejected because it failed
to meet any of the specifications. The success of this project
is, in large part, due to the excellent coo_eration of the con-
tractor with the various units of the Engineering Staff.
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1. One production project was completed this month. This was
a rerun of the ruggedized AN-58B agent antenna. The AN-58B`s
are modified for use with the Delco 5300. Eighty-three units
were modified.
2. Five production projects had partial deliveries this month.
The first was for the CC-15 crystal case. The CC-15 is a
Lexan molded case with a vinyl insert designed to hold Liii
crystals using the HC-6/U holders. One hundred and sixty-
five units were delivered to the warehouse for stock.
3. The second partial completion was for the HG-48A hand-
crank generators. Thirty-two units were delivered to the
warehouse for stock.
4. The third partial completion was for the CL-48 universal
clamp for use with the HG-)+8A. One hundred and thirteen
units were delivered to the warehouse for stock.
5. The fourth partial completion was for the RS-72 transceiver.
The RS-72 consists of a G.E. Porta-Mobil mounted within a
waterproof case and the controls adapted for external opera-
tion and made waterproof. This system is intended to provide
communications from small boats or rubber rafts. Nineteen units
were delivered to the warehouse for stock.
6.
7. The value of equipment fabricated in the Laboratory and delivered
this month was $47,760.
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25X1A6b
8-31 August
Harrisburg, Pa. 4 August
Harrisburg, Pa. 4 August
Philadelphia 25-26 August
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RESIGNATIONS
N.A.
EFFECTIVE PROMOTIONS
N.A.
TRAINING
1 August 1966
15 August 1966
1 - 6 August
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Co-Op students returned to duty:
22 August 1966
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available broadcast quality tape recorder. The master storage
film, of course, is a fixed memory and can not be changed other
than by replacing films. The films are currently prepared by
from a prerecorded tape recording supp.ied
us. However, we are investigating the possibility of preparing
these films ourselves.
Further operational evaluations will be run before the SY-3 is
produced. Preliminary price estimates of $5,000 each in
quantities of ten, less output tape recorder, seem realistic.
It appears that the SY-3 will prove a reliable and convenient
device for field stations.
2. VHF SPREAD SPECTRUM TRANSCEIVER
Approximately one year ago we entered into discussions with
as to the
i i y or constructing a developmental VHF transmitted
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and interference on a spread spectrum system. The transceiver
was to be delivered to us for evaluation and to remain in our
reference noise modulated~spread_spectrum communications
sZstem to augment our speech privacy developments. M had 25X1A5a1
previously constructed and tested a breadboard feasibility
model of the system. They proposed to redesign the s
stem
y
into a 75 cubic inch package for 136,000. At this time the
price and size seemed high in view of their previous work.
Upon re-examination of the situation by both and ourselves,25X1A5a1
it was decided that a more cautious approach was in order. A
contract was let to= for $17,525 to package the system into
a conveniently transportable breadboard to be field tested in
Washington, D. C., to give us a feel for the effects of multipath
possession for not less than 30 days. _ is not to make known
demonstrate or attempt to market to any possible customer,
quite well. The system utilizes a transmitted reference technique
which uses a noise diode as a random source of noise. Two
frequency bands of random noise are transmitted, each 10 MHz
wide and one band being a frequency-shifted version of the other.
They are transmitted side by side in the spectrum centered at
235 MHz. One band is the reference for the other band, which
2
commercial or Government, this system within one year from the
date of delivery of the breadboard to Washington, D. C.
The breadboard was delivered and is now in the process of being
evaluated. The preliminary tests indicate that the system works
1A5al
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carries the informat/ on via narrow band FM. These two bands
are then correlated-in the receiver, resulting in a, simple FM
signal that is fed to a discriminator. There is no obvious
way to derive any intelligence from the signal if intercepted.
The receiver will work when the received signal is as much as
16 db below the ambient noise level. The only way one can
tell the signal is being transmitted is by a, rise in the noise
level in his receiver when very close to the transmitter.
In view of a possible requirement for mobile and body-worn
surveillance transceivers, we have asked for cost and
development time information from _ We have not at this 25X1A5a1
writing received this information, but it will be available
soon.
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TRANSFERS
N. A.
PCs
N. A.
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Dallas, Texas 1-2 August
Torrance, California 22-23 August
Hawthorne, California 24 August
Chatsworth, California 25 August
Buffalo, New York 25 August
16 August 1966
RESIGNATIONS
N. A.
TRAINING
N. A.
EFFECTIVE PROMOTIONS
N. A.
OTHER
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