NEW RADIO TUBE DESIGNATION SYSTEM IN THE USSR

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A000600030003-9
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 15, 2016
• Document Release Date: October 2, 2001
• Sequence Number: 3
• Publication Date: April 14, 1953
• Content Type: REPORT

Approved For Release 2002/02/05 : CIA-RDP80-0081OA000600030003-9
CENTRAL IN.TE.LL.I.G.ENCE AGENCY
INFORMATION REPORT
SECRET
SECURITY INFORMATION
25X1A
New Radio Tube Designation System
REPORT NO.
DATE DISTR.
14+ April 1953
in the USSR
NO. OF PAGES
4
REQUIREMENT NO.
25X1A
REFERENCES .
25X1A
THE SOURCE EVALUATIONS IN THIS REPORT. ARE DEFINITIVE.
THE APPRAISAL OF CONTENT IS TENTATIVE.
(FOR KEY SEE REVERSE)
25X1A
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 contents
to or receipt by an unauthorized person is prohibited
by law. The reproduction of this form is prohibited.
25X1X
 Approved For Release 2002/02/05: CIA-RDP80-00810A000600030003-925X1A
SECRET
-2-
1`. The Soviets ado ted a new s stem for designating radio'tubes early
in 1952. 25X1X
25X1X
25X1A 2. a sketch [seersketch; on,page 3_] which illustrates
the symbol or descriptive designation that appeared on the tubes
and includes a detailed explanation of the characters. This symbol
or designation usually consisted of .five characters in units
or blocks. The first of these was numerical, the second and third
alphabetic, the fourth numerical, and the fifth;. alphabetic.
The second unit of the designation.. was usually omitted on tubes
allocated for civilian use. From this I assume that tubes having
the second unit of designation were intended for military use.
I do not believe many Soviet civilians knew of the second unit
no blank space for that symbol appeared on the tubes used by
civilians. The meanings of the units area
a. The first unit designated the filament. voltage of the tubed
b. The second unit, when it appeared, designated the power.
characteristics of the tube.
c. The third designated the type of tube.
d. The fourth was a number for the type of tube.
that experimental tubes were given numbers upward from 17.
Therefore, the numbers of the tubes issued for military
use would not run consecutively.
e. The fifth unit indicated the size and shape, as well as the
material,, of which the tube eras made.
ti
th
i
i
t
d
t
es
escr
p
llustra
~. Another sAe
e
oh see sketch oft. page, tj
ve jj~~((1q
designations of the American RCA tube X1X
25X1X and the corresponding old Russian
and new ussian designations. in 1948
only'the American type tube designations were known and being used.
These same designations.were later translated into both the old
Russian designations and into the new system presently in use.
25X1X 4. 100-page manual written by G. Wulfinkel 25X1X
explained the characteristics of the Soviet commercial radio re-
ceiver tubes. It was published in the USSR before the new Soviet
designation system was completed, probably in 1949 and no
reference was made to the new system. This particular publication'
was not obtainable on the open market because of its limited
distribution. However, I believe it is presently used exclusively
by the military and has been ammended to include new radio tube
designations.
SECRET
Approved For Release 2002/02/05 : CIA-RDP80-0081OA000600030003-9
 Approved For Release 2002/02/05 : CIA-RDP80-0081OA000600030003-9
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25X1A
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RUSSIAN RADIO TUM UESI NATIONS SYSTEM
Approved For Release 2002/02/05 : CIA-RDP80-0081 OA000600030003-9
`- L CO G-.45
 Approved For Release 200202/05: CIA-RDP80-00810A000600030003-5X1 A
RC6 Dest na t ov old Russian Deli nation New Rassia0 peSi ha oh
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R U S S: IA N
RAbIO T-VbM "DESIG NAT I01 1 5Ys-reM,
Approved For Release 2002/02/05 : CIA-RDP80-0081OA000600030003-9