SOVIET AND SATELLITE-MANUFACTURED RADIO EQUIPMENT

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP82-00046R000500090007-0
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 7
• Document Creation Date: December 27, 2016
• Document Release Date: May 30, 2013
• Sequence Number: 7
• Publication Date: June 13, 1955
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release @ 50-Yr 2013/05/30: CIA-RDP82-00046R000500090007-0
INFORMATION REPORT? INFORMATION REPORT
CENTRAL INTELLIGENCE AGENCY
This material contains information affecting the National Defense of the United States within the meaning of the Espionage Laws, Title
18, U.S.C. Secs. 793 and 794, the transmission or revelation of which in any manner to an unauthorized person is prohibited by law.
COUNTRY Rumania/USSR REPORT NO.
SUBJECT Soviet and Sate11ite7Manufaotured DATE DISTR.
Radio Bquipment
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j3 June 1955
NO. OF PAGES 7
DATE OF INFO.
REQUIREMENT NO. RD
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PLACE ACQUIRED
REFERENCES
DATE ACQUIRED
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SOURCE:
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STATE
ARMY
NAVY
AIR
X FBI
AEC
(Note; Washington distribution ind
ibution by "#".)
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INFORMATION REPORT INFORMATION REPORT
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CONFIDENTIAL REPORT NO.
COUNTRY Rumania -
SUBJECT Soviet and Satellite-MaTnufactured
Radio Equipment
DATE OF INFORMATION
PLACE ACQUIRED
THIS IS UNEVALUATED INFORMATION
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DATE DISTR. 24 May 1955
NO. OF PAGES 6
REFERENCES:
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SOURCE
NOTE: All receivers had 10 to 15 meter-long antennas 6oxi
which were ground-connected and used a single wire. No pravisions
were made for the use of coaxial or doublet antennas.
1.
raaio equipment:
the following Soviet and Satellite-manufactured 50)0
a. Soviet-manufactured RSB transmitter and receiver
b. Soviet-manufactured SRKS transmitter
o. Soviet-manufactured US receiver
d. A seven or eight-tubebattery-powered receiver Which source believes
was manufactured by the Soviets although its name and identification
number had been removed from its panel.
e. Hungarian-manufactured Philips transmitterand receiver .which was pos.'
gibZycma of the first sets made by Hungary under reparations to
the Soviets.
f. Old German-manufactured PUO-10 transmitter and receiver equipped
with a new antenna-tuner, power supply, and control box.
5. A Czech-manufactured receiver possibly made by Tula'
h. Rumanian 75-watt short-wave transmitter manufactured by the
former Standard Radio and Telephone Factory in Bucharest.
i. Direction finder battery-powered short-wave receiver also
manufactured by Standard in Bucharest. Source believes that the
Standard sets were designed for the use of the security services.
-arIXIPZIRILTIAL
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CONFIDENTIAL
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RSB Transmitter and Receiver
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The aerial system consisted of a single-wire Marconi antenna with
counterwi, This antenna, about 12 m. in length, worked efficiently
and was tuned by a variomettsr included in the transmitter. Tuning
was checked by a thermic amperemeter (ammeter), Because the thermo-
couplings of the ammeters were of such poor quality, they broke down
after a few tunings; therefore, operators preferred to use neon tubes.
.Source considers that the RSB offered amazing performance. A friend
told him in 1947 that he had been able to maintain short-wave contact
with Bucharest almost daily with this transmitter while on a voyage
to New Yerk. However, the operators complained because this battery-
powered transmitter used directly-heated cathode tubes; these tubes
became overheated frequently and led to premature breakage of the
oscillator tubes. Also, a shift of frequency always occurred when
the key was depressed.
Tuning to a frequency was very difficult because ?the RSB receiver was
not new and because it had a very small dial scale. It had no
crystal filters or variable tuning controls. Reception sensitivity
on short wave was poor but that for medium and long wave was adequate.
Although there was a possibility of using the transmitting aerial for
receiving by building a special antenna relay into the transmitter's
case, SOVROMTRANSPORT operators never used it because it interfered
with the break-in system.
IA general, the RSB radio set_was completely
reliable bu c a as a o operate it efficientlza skilled operator
with iron nerves was needed. Maintenance was easy but slight
difficulties occurred when the oscillator tube broke down and had
to be exchanged.
6. In Rumania, nearly all tugboats were equipped with RSB sets.
learned from the Soviet director of SOVROMTRANSPORT's Radio es on
and saw in the booklet, Direction for Use, that the Soviets used these
sets in their aeroplanes, tanks, and army trucks. When they were used
in trucks, gasoline generators were used to charge the batteries.
Until 1949, SOVROMTRANSPORT used these gasoline generators on their
tugboats but discontinued that practice later because the generators
were defective.
CONFIDENTIAL
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CONFIDENTIAL
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SRNS Transmitter and US Receiver
7. The aerial system for abort waVe con$1*ted,02,4fiAng1;t
wire Marconi-type antenna. For medium wave, a 10 to 15-meter-long
antenna was used. This latter antenna consisted of two single
wires connected in parallel. The original aerial used for the SRKS
transmitter was designed for medium wave only and had the regular
Marconi-type antenna; however, it was difficult to mount and dis-
mount aboard a ship and was,therefore, discontinued. (See- page .5
for.. a sketch of this aerial.)
8. The transmitter was constructed on the same pattern as that of the 50X1
RSB but, in addition to short wave, it also worked on medium wave.
The transmitter used indirectly-heated cathode tubes but, in
of this,frequency shifts occurred during the keying period.
qpnate this set only on short wave and it seemed to him to
efficient as the _ RSB model. He learned from radio operators that
contact on medium wave was good up to 400 sea miles. The SRNS seemed
to be more reliable than the RSB, especially on small sea-going ships.
Maintenance of the SRNS transmitter and its US receiver was easier
than that of the RSB because of the better quality of the SRNS.
Philips Transmitter and Receiver
9. --...... It used a
1V 6V .1.-mezer-1ong antenna for short wave and .a 20 to 30-meter-long
Marconi antenna for medium wave. Both of these antennas were tuned hY
variomoters included in the transmitter. (See page 6 for a sketch of
this aerial.) To obtain the proper antenna capacitance on short wave,
various fixed capacitors were usedwith the aerial. For medium wave,
various plots on a Special coil gave the proper antenna inductance.
4.
10.
The Philips* set 104 of very poor quality And was the 'result of bad
workmanship, possibly due to the raot that it was. "oulat by the Hungarians
as reparations to the Soviets. . The'receivemwas improperly construct-
ed and there was bad contactl)stween the variable 'coils and the tuning
contacts on the short-wave transmitter. This resulted in frequent
-intermittent transmitision and even auto-oscillations. The medium-wave
change a fret:1126mm-- winfiulated continuous wave wa= .. and " 50X1
transmitter was very diffioult/to tune and.it.tOok a long time to
?rpm
medium wave, this set off ? ?rma .con act within 200 to 300 sea
Mlles. Source is of the opinion that these Philips sets were unreliable
and were very inferior to the SRO, Maintenance.and repair of the
Philips set was'difficult. The numbers -Of the tube sockets and those
on other parts did not Correspond to the blueprints because various -
parts with completely different numbers had been taken from old German
sets. The wires connected to the generators-and batteries were not
marked and also made identification very difficult. "
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FUG-10 Transmitter and Receiver
21. The German FUG-10 was Manufactured prior to or during World War.=
with the exception of the antenna-tuner, power supply, and control
box all of which were manufactured in East Germany after the end of
the war.
12. The transmitter and receiver. had Marconi antennas which were about
12 m. in length. For antenna tuning on short-wave trans lesion
(sender kurz), two variometers, one radio frequency amperemeter? and
various fixed capacitors were used. The proper antenna capacitance
was obtained by turning a swgtoh.
CONFIDENTIAL
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iinterrig 63-s tem on the kaLak. fire SULINii.
10-15 met
radio room en starboard side
lari antenna
receiving
tern
00 oo
MIDIA
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4ntenna System on the CONSTANTA and UNGALIA
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