The SCR-694 was a portable
two way radio set used by the
U.S. military
The United States Armed Forces are the military forces of the United States. The armed forces consists of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. The president of the United States is the ...
during
World War II.
History
The SCR-694 replaced the
SCR-284 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
Airborne forces, airborne troops, or airborne infantry are ground combat units carried by aircraft and airdropped into battle zones, typically by parachute drop or air assault. Parachute-qualified infantry and support personnel serving in ai ...
but soon became the Army-wide standard at
battalion 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
Operation Overlord was the codename for the Battle of Normandy, the Allied operation that launched the successful invasion of German-occupied Western Europe during World War II. The operation was launched on 6 June 1944 (D-Day) with the Norma ...
and the
Cabanatuan prison raid as well as by scouts and reconnaissance units in the
Pacific War
The Pacific War, sometimes called the Asia–Pacific War, was the theater of World War II that was fought in Asia, the Pacific Ocean, the Indian Ocean, and Oceania. It was geographically the largest theater of the war, including the vast ...
.
Specifications
The SCR-694 "Radio set, Portable/Vehicular" consisted of the BC-1306
vacuum tube transmitter/receiver capable of
AM and
CW mode operation between 3.800 and 6.500
MHz.
*Weight — 19.5
pounds.
*Range — up to 15 miles on AM voice. Up to 30 miles reported on
Morse code
Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code is named after Samuel Morse, one of ...
between moving vehicles
*Transmitter —
Crystal control, frequency doubler
*Power supply — 6, 12 or 24
Volts 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
*
SCR-300
*
SCR-536
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