WERK FUER FERNMELDEWESEN HF (OSW) DEVELOPMENT OF ELECTRON BEAM TUBES FOR THE USSR

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A002800170001-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 27, 2016
• Document Release Date: June 28, 2013
• Sequence Number: 1
• Publication Date: November 13, 1953
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2013/06/28: CIA-RDP80-00810A002800170001-5
CENTRAL INTELLIGENCE AGENCY
INFORMATION REPORT
50X1-HUM
This Document contains information affecting the Na-
tional Defense of the United States, within the mean-
ing of Title 18, Sections 793 and 794, of the U.S. Code, as
amended. Its transmission or revelation of its conteilt,s
to or receipt by an unauthorised person is prohibited
by law, The reproduction of this form is prohibited,
SECRET/CONTROL - U.S. OFFICIALS ONLY
SECURITY INFORMATION
COUNTRY East Germany
'50X1-HUM
REPORT
SUBJECT Werk fuer Fernmeldewesen EF (OSW)
DATE DISTR,
13 November
1953
Development of Electron Beam Tubes for
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The USSR
NO. OF PAGES
2
DATE OF INFO.
REQUIREMENT
PLACE ACQUIRED
REFERENCES
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THE SOURCE EVALUATIONS IN THIS REPORT ARE DEFINITIVE,
MI APPRAISAL OF CONTENT IS TENTATIVE,
(FOR KEY SEE REVERSE)
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A. 221212pment of an electron beam, tube for pulse code modulation
1. In 1951/ when the present VEB Work fuer Fernmeldousen, Berlin-Oberschoeneweide,
Ostendstrasse 1-5, was a Russian SAG Kabel concern/ the Russians placed an order
there for the development of an electron beam tube for pulse code modulation.
2. The task was assigned to Ing. Fiedler of the HF plant; he worked
left for the Heinrich Hertz Institute of the East German Academy
autumn 1952.
development of the tube was part of a task given to the NEF (the
HF plant devoted to research and development of signal equipment
a communications system using pulse code modulation.
t e speci ications set for the tube were
at it until he
of Sciences in
the
section of the
to develo
Pulse width:
Pulse edge steepness:
/
about 1.5 p.sec
about 0.512sec
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which gives a beam diameter of about
0.1 mm 50X1-HUM
There were no specifications for Uao and Ia,), and the pulse amplitude was
unknown. It was remarked that a tube had values of Ua, 1000 V
and Ia, ? 10juA. The
3. Construction of these tubes was started in 1952, but the results were unsatis-
factory. The first passable results were obtained in spring 1953, when three
laboratory models were made in OSW.
4. In July 1953, no development work was in progress/but Walter Wenderoth of OSW
had taken over the three tube models and was going to test them. It was also
known that the apparatus associated. with these tubes was being developed in
another section of OSW.
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STATE
ARMY
NAVY
AIR
FBI
AEC
OFtREv
051 Ev
(Note: Washington Distribution Indicated By "X"; Field Distribution By "#".)
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- 2 -
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B. Production of metal ceramic valves
5. Although the USSR earlier this year stopped acceptance of all metal ceramic tubes
from the VEB Werk fuer Fernmeldewesen, new orders for the same items were later
placed with the same firm. In July 19531 the Russians placed an order for 40000
metal ceramic tubes type LA-7. This caused some difficulties in the German
factory, because the metal ceramic tube department had by then been dissolved,
as a result of the lack of Rusdian orders, and the workers assigned to other
departments.
6. Russian acceptance officials
Two Russian acceptance officials were sent to OSW for the LA-7 and LA-9 tubes,
which the Russians had also ordered. They were Engineer Erechenko (Thu) and
Engineer Novotvurskiy (fnu) (both names phonetic). Engineer Erechenko was in
the Svetlana tube factory, Leningrad, in 1950; he was at that time working at
Svetlanaon a temporary transfer from his normal work at the tube factory in
Novosibirsk.
7. Production fiiHEEE
the Metal Ceramic Tube Production Department of OSW, production
(exclusively for the USSR) totaled 1,000 LD-7 and 1,000 LA-9 per month during
July and August 1953. production of these two tubes was
then to cease, and LA-11 and LA-12 tubes were to be manufactured. Planned
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future 1953 production was as follows:
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LA-11
LA-12
Production/
August, and the reject rate had been considerably lowered.
September
1,000
1,000
October
1,800
1,800
November December
2,000
2,000
2,000 2,000
was running r11 at the end of
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2.
Comment: It would appear from paragraph 71 above, that a total of 41000
tubes of types LA-7 and LA-9 were finally made; it is not clear whether the
second sentence of paragraph 5 is incorrect, or if the Russian order was at
some stage modified.
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I__ Declassified in Part - Sanitized Copy Approved for Release 2013/06/28: CIA-RDP80-00810A002800170001-5