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ANTENTOP- 03- 2003, # 004
RBM Radio
Radio RBM is one of the most famous Russian military radio that was used in the WW-II and after the war as a
surplus radio. RBM took place in the WW-II, after the war RBM was used as trial radio for military teaching
centers. Lots of Russian hams know well the radio. I want to give some information about RBM and its antennas
at ANTENTOP.
73! I.G.
History:
Radio RBM, firstly named as RB (Radio,
Base), was designed before the WW-II, in the 1938,
in the Research Center of Communication of Red
Army, by a special research group guided by colonel
Sosunov. Special variant of RB named as RB-40,
that had low weight because it was made in an
aluminum cabinet was produced from end of 1939
for spy and partisan. It was made near 1000 RB-40,
but then its producing was stopped because the
aviation need aluminum. In the 1942 some
modifications were done in the radio, and RB was
named as RBM (Radio, Base, Modified). In the 1943
both with RBM was produced RBM-5 that has 5
watts power compare to 1 watt that RBM has. After
WW-II other modification of RBM named as RBM- 1
was produced. RBM-1 was produced until end of
50s. Some samples of RBM-1 was produced for
export (see
picture with Latin letters on the front
panel).
RBM –1 consists of from two
boxes, one is the transceiver other is its supply unit.
WW- II. USSR, Leningrad Front, 1943.
Radio RB
Composition:
Transceiver
has dimension of 345x195x260-mm,
weight of 13 KG. It works at two frequency ranges, I-
5.0- 2.75 MHz, II - 2.75-1.5 MHZ, has CW and AM
modes. Transmitter made on vacuum tubes
Transmitter
has 1 watt output(in reality 1.5 watts),
plate current 35-mA and heater current 1-A.
Export Sample of RBM-1
Receiver
has sensitivity of 10-µV at AM and 3-µV
at CW, plate current 10-mA and heater current 0.5-
A.
Transmitter and receiver use common units as: an
antenna and output audio transformer, that does
modulation for transmitter at AM mode and audio at
receiving mode.
Power
supply has three batteries of BAS-80 for
plate and a NiCad accumulator 2NCN-24 for heater,
weight of 14 KG. The Power Supply run the radio
during 24- 36 hours.
Purpose
of RBM is to do reliable simplex
communication at any conditions. Distance of the
communication depends on antennas that use with
the radio.
http://www.antentop.bel.ru/
mirror
:
www.antentop.boom.ru
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ANTENTOP- 03- 2003, # 004
Short Whip Antenna
does communication near
10 kms on AM and near 15 kms on CW.
RBM Radio
I live near village Prohorovka, Russia, where at
July-4- August 5, 1943, The greatest tank battle
of WW - II was. As I know, near 500 samples of
RB radio took place in the battle
German tank Elefand/Ferdinand
Destroyed by a tank mine.
Prohorovka, July, 1943
USSR tank KV-1
Destroyed by a German tank Tiger.
Prohorovka, July, 1943
Russian RBM-1
http://www.antentop.bel.ru/
mirror
:
www.antentop.boom.ru
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ANTENTOP- 03- 2003, # 004
RBM Radio
Schematic of RBM-1
Ground Dipole Antenna
does communication near
17 kms on AM and near 35 kms on CW.
Mast Antenna
does communication near 30 kms on
AM and near 50 kms on CW.
http://www.antentop.bel.ru/
mirror
:
www.antentop.boom.ru
Note:
The distance of communication is shown for
daytime at middle level of interferences. At nighttime and
at high level of interferences the distance of
communication is decreased in two times.
Page 88
ANTENTOP- 03- 2003, # 004
RBM Radio
Picture from Russian Manual
http://www.antentop.bel.ru/
mirror
:
www.antentop.boom.ru
Page 89
ANTENTOP- 03- 2003, # 004
RBM Radio
Picture from Russian Manual
Winter, 60s, XX- century, Russia
http://www.antentop.bel.ru/
mirror
:
www.antentop.boom.ru
Page 90

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