BC-348

The BC-348 is a compact American-made communications receiver, which was mass-produced during World War II for the U.S. Army Air Force. Under the Joint Army-Navy nomenclature system, the receiver system became known as the AN/ARR-11.

The BC-348 is the 28 vdc powered version of the 14 vdc powered BC-224. The first version, the BC-224-A, was produced in 1936. Installed in almost all USAAF (and some USN, some British and some Canadian) multi-engined transports and bombers used during the fifteen-year period from before World War II through the Korean War, BC-348 radio receivers were easy to operate and reliable. Designed as LF/MF/HF receivers for use in larger aircraft (B-17, B-24, B-25, B-26, B-29, C-47, etc.), they were initially paired with a BC-375 transmitter in the SCR-287-A system. Late in World War II, the AN/ARR-11 (BC-348) was the receiver and the AN/ART-13A (ART-13) was the transmitter in the AN/ARC-8 system.

They were also used in some ground and mobile installations such as the AN/MRC-20. The BC-348 series ran to several variations during its long production history, which included the BC-224. More than 100,000 of these receivers were produced, 80 percent by Belmont Radio and Wells-Gardner and the balance by RCA and Stromberg-Carlson. BC-348 receivers were copied and manufactured by the U.S.S.R. following War II by the Russian Vefon Works and labeled (US-9 in English, US as Universal Superheterodyne, not United States.) The УС-9 continued to be produced in the Soviet Union through the 1970s, with such improvements as a solid state inverter to replace the dynamotor.

Enola Gay, the B-29 Superfortress bomber that dropped "Little Boy", the first atomic bomb on Hiroshima, Japan was equipped with the AN/ARC-8 system. Today, many examples of the BC-348 are restored and operated by vintage and military amateur radio enthusiasts.

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