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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.
==History==
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.〔http://www.vmarsmanuals.co.uk/new/bc348.htm Vintage & Military Amateur Radio Society Technical Information Service〕 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 УС-9 (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.〔http://nj7p.org/history/bc-348.html BC-224 AND BC-348 AIRCRAFT RADIO RECEIVERS〕
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.〔http://aafradio.org/flightdeck/b29.htm U.S. Military Aircraft Avionics from 1939 to 1945〕 Today, many examples of the BC-348 are restored and operated by vintage and military amateur radio enthusiasts.〔http://www.vmarsmanuals.co.uk/ VMARS Technical Information Service〕
The AN/ARC-8 system was still in service in older USAF aircraft in the early 1970s. At that time, military surplus dealers near Davis-Monthan Air Force Base in Tucson, Arizona, had stacks of the BC-348, that had been removed from aircraft, for sale to the public at $17 each.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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