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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク National HRO ： ウィキペディア英語版 National HRO The original National HRO was a 9-tube HF (shortwave) general coverage communications receiver manufactured by the National Radio Company of Malden, Massachusetts, USA. ==History== James Millen (amateur radio call sign W1HRX) in Massachusetts was in charge of the mechanical design. According to several accounts, Herbert Hoover, Jr. (amateur radio call sign W6ZH), son of US President Herbert Hoover, and Howard Morgan (of Western Electric) designed the electronics in Hoover's garage in Pasadena, California.〔http://www.ibiblio.org/pub/academic/agriculture/agronomy/ham/BOATANCHORS/OLDER-ARCHIVES/2001-BA/2001-2ndQtr/20010401.ba.v03_n136 Boatanchors Discussion〕 Dana Bacon (W1BZR) was also involved and wrote about the receiver as second author with James Millen. Some of National Radio's tool makers marked their overtime slips with HOR for "Hell Of a Rush." Management decided that a version of that abbreviation should be the name of the new receiver, choosing the slight alteration HRO to make it less objectionable.〔() Antique Wireless Association〕〔http://jproc.ca/rrp/sradequ.html Antique Wireless Association〕 That was quickly countered by saying that HRO stood for "Helluva Rush Order".〔http://www.qsl.net/jms/bio_rem/bhnc.html Antique Wireless Association〕 The HRO receiver was first announced in QST magazine in October 1934 and shipped in March 1935, incorporating many design features requested by the fledgling airline industry 〔http://www.qsl.net/jms/bio_rem/national.html National Receivers〕 that were also attractive to the amateur radio community. According to the 1935 instruction manual,〔ftp://bama.sbc.edu/downloads/national/hro1935/ National HRO Manual〕 the HRO price was US$233, the external power supply (to reduce heat in the receiver cabinet and hum) 〔http://www.radioblvd.com/National%20HRO.htm Radio Boulevard〕 was US$26.50 less tubes, and a 7000 ohm speaker in a rack panel was US$30.00. The HRO found widespread use during World War II as the preferred receiver of various Allied monitoring services, including Y-Service stations associated with the code-breaking group at Bletchley Park (Station X) in England.〔 An estimated 1,000 standard HROs were initially purchased by Great Britain, and approximately 10,000 total saw use by the British in intercept operation, diplomatic communications, aboard ships and at shore stations as well as for clandestine use.〔http://www.prismnet.com/~nielw/HRO_BarryWilliams/HROArticle.htm The Evolution of the National HRO and Its Contribution to Winning World War II, by Barry Williams, KD5VC〕 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「National HRO」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.