The SCR-245 Radio was a mobile
MF/
HF 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."
...
used by the
U.S. Army
The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cla ...
before and 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 opposin ...
, for short range ground communications, It was one of the first
crystal controlled
A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable cloc ...
sets used by the Army.
Use
The SCR-245 was standardized on 10 June 1937, and used by Armored forces for command and control of tank units. It replaced the earlier
SCR-189
The SCR-189 was a mobile Signal Corps Radio tested by the United States Army before World War II. It was designed for armored forces, and mounted in the Six Ton Tank M1917. The original production run of these tanks included 50 "radio tanks" but ...
and was used primarily in the early M2, M3 light tanks as well as the early M3 medium tanks. Their large size required them to be mounted in the tanks
sponson
Sponsons are projections extending from the sides of land vehicles, aircraft or watercraft to provide protection, stability, storage locations, mounting points for weapons or other devices, or equipment housing.
Watercraft
On watercraft, a spon ...
s. It was replaced by the
SCR-508
The SCR-508 radio was a mobile Signal Corps Radio used by the U.S. Army during World War II, for short range ground communications. The SCR-508 series radio represented the Army's commitment to both FM and crystal tuning, and was used extensively b ...
sets.
Components
* BC-223 Transmitter
**Modes: AM, CW.
**Frequency range: 4
crystal-controlled channels, 2.0 MHz to 4.5 MHz.
**RF Power output: 10 Watts.
**Range: CW 45 Miles. Voice 20 Miles.
* BC-312 Receiver (See
BC-342
The BC-342 was a World War II U.S. Army Signal Corps high frequency radio receiver. It was used primarily as part of field installations such as the SCR-188A, but could be used with mobile sets such as the 2 1/2 ton mounted SCR-399. First designed ...
)
* PE-55 Dynamotor (12Volt input)
* MP14 or MP37 mast base and 15 foot whip antenna.
Variants
* SCR-210 Receiver only set
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."
...
*
Crystal oscillator
A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable cloc ...
References
{{Reflist
General references
* TM 11-487 Electrical Communications Equipment
TM 11-227 APRIL 1944 Radio Communication Equipment (Directory)TM 11-272Radio to free Europe
External links
SCR List (archived)— US Army Signal Corps Museum
BC List— US Army Signal Corps Museum
Amateur radio transmitters
Military radio systems of the United States
World War II American electronics
Military electronics of the United States
Military equipment introduced in the 1930s