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The BC-342 was a World War II U.S. Army Signal Corps high frequency radio receiver. It was a 115 Volt AC version of the BC-312 receiver that used the RA-20 rectifier instead of the BC-312's DM-21 dynamotor. 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 at Fort Monmouth, New Jersey by the U.S. Army Signal Corps, it was built by various manufacturers including RCA. Many of the later units that are encountered today were manufactured by the Farnsworth Television and Radio Corporation of Fort Wayne, Indiana. Its low frequency counterpart is the BC-344 radio receiver that is almost identical to the BC-342.〔http://oak.cats.ohiou.edu/~postr/bapix/BC342.htm BoatAnchor Pix, Signal Corps BC-342N Receiver〕 ==Specifications== The BC-342 could be operated from fixed and mobile positions. *Power - An internal RA-20 AC rectifier power supply unit is fitted providing 250 volts DC and 12 vo;ts AC for the receiver tube filaments (three pairs of the 6 volt tubes are wired in series and three in series / parallel). *Manual Reference: TM 11-850 *Components: RA-20 Power Supply *Weight: 58 lbs. *Frequency Range: 1.5-18 MHz *Power Input: 110 VAC 60 Hz *Part of: SCR-197, SCR-237, SCR-277, SCR-299, SCR-399, MRC-1 10 vacuum tubes〔http://www.antiqueradio.com/Nov03_DAntuono_BC342.html Antique Radio Classified〕 included: *RF amplifiers - 6K7 (2) *Mixer - 6L7 *Local oscillator - 6C5 *IF amplifiers - 6K7 (2) *CW oscillator (BFO) - 6C5 *Detector/1st AF - 6R7 *Audio output - 6F6 *Rectifier - 5W4 The BC-342 was similar to the BC-348. Heavy chassis design was employed to minimize drift and oscillator instability due to temperature changes and vibration.〔http://www.gordon.army.mil/OCOS/Museum/bc1.asp Fort Gordon Military Museum〕〔http://www.nj7p.org/cgi-bin/millist2?mode=normal&name=BC-342J7P Military List Database〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BC-342」の詳細全文を読む スポンサード リンク
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