The SCR-189 was a mobile

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 ...

tested by the

United States Army The United States Army (USA) is the primary Land warfare, land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of th ...

before

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

. 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 the original radio components are unknown, so what or how many tanks were fitted with the SCR-189 also appears to be unknown.

Use

An early tactical vehicle radio, it was the first Army set to utilize the

Superheterodyne A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original car ...

receiver. As the M1917 tank was phased out, the new

M1 Combat Car The M1 combat car, officially Light Tank, M1, was a light tank used by the United States Cavalry in the late 1930s and developed at the same time as the U.S. Army Infantry Branch's very similar Light Tank, M2. After the Spanish Civil War, mos ...

and

M2 Light Tank The M2 light tank, officially Light Tank, M2, was an American light tank of the interwar period which saw limited service during World War II. The most common model, the M2A4, was equipped with one M5 gun and five .30 cal M1919 Browning mac ...

were equipped with SCR-189's. The SCR-189 was replaced by the SCR-245 in 1937.

Components

* BC-175 Receiver * BC-176 Transmitter CW/voice, 2.200 kHz, to 2.600 kHz at 7.5 Watt, range 8 Miles * BC-177 Control box * BC-206 Control box * PE-48 Power supply * Battery box BX-3 (Battery BA-27)

Variants

* SCR-190 Receiver only set

References

{{Reflist

External links

* https://web.archive.org/web/20100413132056/http://www.gordon.army.mil/ocos/museum/equipment.asp scr and bc lists Radio systems of the United States Army Amateur radio transmitters Military equipment introduced in the 1930s Military electronics of the United States

Use

Components

Variants

See also

References

External links