TRANSMITTING AND RECEIVING RADIO SET RM-31-P

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A037200650001-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 6
• Document Creation Date: December 22, 2016
• Document Release Date: June 8, 2010
• Sequence Number: 1
• Publication Date: September 23, 1957
• Content Type: REPORT

Sanitized Copy Approved for Release 2010/06/08: CIA-RDP80T00246A037200650001-7
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.
S-E-C-R-E-T/NCr~?ORN 1 RUC[,li "'1v/O ,
VPY
COUNTRY Czechoslovakia
SUBJECT Transmitting and Receiving DATE DISTR. 23 SEP
Radio Set RM-31-P
NO. PAGES 1
REQUIREMENT
NO. RD
DATE OF
INFO.
PLACE &
DATE AC
t. The latest type of Czechoslovak transmitting and receiving set designated
for use by artillery, infantry and antiaircraft artillery is the RM-31-P.
The set is the product of Tesla, Pardubice. Technically, except for a. few
minor changes which allegedly simplified the functioning, this set resembles
the Rini-31-A set used in vehicles and tanks, It is a 6-watlt set with 'a range
of frequencies from 2,000 to 6,000 kilocycles and a smallest possible change
of 5 kilocycles. The set has 16 miniature electron tubes belonging to the
series T-1, T-2, T-3, and T-14-,all of which are army types (the corresponding
civilian types are probably 1-F-33 and 1-H-31)o The end electron tube is of a
normal size. There are two accumulators for the supplying of heating current;
the accumulators are of the 2-KN-10 105-volt type with nine hours of working
capacity. Thus the set can be for 18 hours in continuous use. The
transmitter is supplied with 300,-volt current from a hand-operated dynamo.
paragraph above and additional details on this radio set including technical
data, a description of the components of the set, a description of the
accumulator and spare parts case, a description of the dynamo used to
operate the set, and a description of antennae used. These descriptions are
keyed to accompanying sketches.
STATE .~, ARMY
S-E-C-R-E-T`NOEJRN
NAVY AIR
I IFBI AEC
(Note: Washington distribution indicated by "X"; Field distribution by "#".)
I
A
Sanitized Copy Approved for Release 2010/06/08: CIA-RDP80T00246A037200650001-7
 Sanitized Copy Approved for Release 2010/06/08: CIA-RDP80T00246AO37200650001-7
July 12, 1957
"rransnitting and ;receiving .radio Set.
1. The laitest tie of Cssechoelovalt transmitting and receiving Set
riesignated for use by artillery, infantry and antiaircraft artillery
is the }?M-31-P. The set is the pros t of eal a isd
?Technical]y, except fors" dew minor changes which
t the functianimg, this set resembles the M -31-A met (mod in vehicles
and tanks). it is a 6-watt got with r range of 'frequencies from
2,000 to 6,044 kilocycles and the smallest possible change of 5 kilo-
cycles. y}e set has 16 miniature electron tubes belonging to the
series T-1, 'I-2, r-3 and T-4 ,all of which are ar r type.
civilian types are probably 1--F-33 and 1-H-31)- The end electron tuba
is of a normal size. There are two accumulators for the supply of
heating current; the accumulators are of the 2-,igN-10 1.5 volt type
with nine hours of working capacity ? Thus the set can be f=-M-
in E continuous usze% /~' transmitter is supplied with 300 volt current
from a hand operated moo.
2. Technical data:
3?
odels idL 31-'
'ooaser: 6 watt
~'requgney range: 2,000 - 6,OOO kilocycles
Tubas s 16 miniature elctron tubes, 1 normal. size and tube
:eating voltage: 1.5 volt
Sources of electric currants 2 accumulators 1.5 volt, 1 hand operated
dynamo 300 volt