The SCR-694 was a portable
two way radio
A two-way radio is a radio that can both transmit and receive radio waves (a transceiver), unlike a broadcast receiver which only receives content. It is an audio (sound) transceiver, a transmitter and receiver in one unit, used for bidirec ...
set
Set, The Set, SET or SETS may refer to:
Science, technology, and mathematics Mathematics
*Set (mathematics), a collection of elements
*Category of sets, the category whose objects and morphisms are sets and total functions, respectively
Electro ...
used by the
U.S. military during
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
.
History
The SCR-694 replaced the
SCR-284 The SCR-284 was a World War II era combination transmitter and receiver used in vehicles or fixed ground stations.
History
The Crosley Corporation of Cincinnati, Ohio manufactured the Signal Corps Radio set SCR-284 that consisted of the BC-6 ...
and was later replaced by the
AN/GRC-9. Designed to provide communication between moving or stationary vehicles or as a portable field radio set, the SCR-694 was originally intended for use by mountain troops and
airborne forces but soon became the Army-wide standard at
battalion
A battalion is a military unit, typically consisting of 300 to 1,200 soldiers commanded by a lieutenant colonel, and subdivided into a number of companies (usually each commanded by a major or a captain). In some countries, battalions a ...
level.
The SCR-694 saw use all over the army in many different theaters; notable instances include at regimental division headquarters during the
Normandy invasion and the
Cabanatuan prison raid as well as by scouts and reconnaissance units in the
Pacific War.
Specifications
The SCR-694 "Radio set, Portable/Vehicular" consisted of the BC-1306
vacuum tube
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
The type known as ...
transmitter/receiver capable of
AM and
CW mode operation between 3.800 and 6.500
MHz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...
.
*Weight — 19.5
pounds.
*Range — up to 15 miles on AM voice. Up to 30 miles reported on
Morse code between moving vehicles
*Transmitter —
Crystal
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macro ...
control, frequency doubler
*Power supply — 6, 12 or 24
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827).
Defin ...
s DC, PE-237
Vibrator Power Unit
*Optional accessories — hand crank generator with seat, antenna system, spares tube kit, canvas bags, Jeep mounting plates.
*Manual — TM 11-230C
[{{cite web , url=https://www.youtube.com/watch?v=LACLE6YTV28 , title=Radio Set SCR-694 U.S. War Dept. Training Film , access-date=3 June 2015]
See also
*
Signal Corps Radio
Signal Corps Radios were U.S. Army military communications components that comprised "sets". Under the Army Nomenclature System, the abbreviation SCR initially designated "Set, Complete Radio", but was later misinterpreted as "Signal Corps Radio."
...
*
SCR-300
The SCR-300 was a portable radio transceiver used by US Signal Corps in World War II. This backpack-mounted unit was the first radio to be nicknamed a "walkie talkie".
History
In 1940, Motorola (then the Galvin Manufacturing Company) received a ...
*
SCR-536
The SCR-536 was a hand-held radio transceiver used by the US Army Signal Corps in World War II. It is popularly referred to as a walkie talkie, although it was originally designated a "handie talkie".
History
The SCR-536 is often considered th ...
Notes
References
* TM 11-230 dated 15 Aug. 1944
* TM 11-227 Signal Communication Directory. dated 10 April 1944
TM 11-487Electrical Communication systems Equipment. dated 2 Oct. 1944
External links
* https://www.youtube.com/watch?v=LACLE6YTV28 training film
* http://www.olive-drab.com/od_electronics_angrc9.php
* https://web.archive.org/web/20090205020349/http://gordon.army.mil/OCOS/Museum/ScrComponents/scrPart1.asp SCR list
Amateur radio transmitters
Military radio systems of the United States
World War II American electronics
Military electronics of the United States