翻訳と辞書 Words near each other ・ Grieg Hall ・ Grieg Music Education ・ Grieg Seafood ・ Grieg's music in popular culture ・ Grieg's Piano Concerto In A Minor (song) ・ Grid River (Părău) ・ Grid Runner ・ Grid Security Infrastructure ・ Grid Systems Corporation ・ Grid Trade Master Agreement ・ Grid view ・ GRID-Arendal ・ Grid-connected photovoltaic power system ・ Grid-Enabled Measures ・ Grid-hpa ・ Grid-leak detector ・ Grid-oriented storage ・ Grid-tie inverter ・ Grid-tied electrical system ・ Grid.org ・ GRID1 ・ GRID2 ・ Grida Dance ・ GridApp Systems ・ Gridcentric, Inc. ・ Gridchinhall ・ Gridcosm ・ Griddhraj Parvat ・ Griddle ・ Griddle scone Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Grid-leak detector ： ウィキペディア英語版 Grid-leak detector A grid-leak detector is a thermionic valve (UK, Australia, NZ etc.), or vacuum tube (USA), circuit used in older vacuum tube AM radio receivers, which served as a combination amplifier and detector (rectifier) to extract the audio signal from the modulated radio frequency signal. The tube used a grid leak circuit to generate the DC grid bias voltage necessary for proper operation from grid current that occurs in all vacuum tubes due to electrons attracted to the grid during the positive part of the RF cycle. == History == The heyday for grid-leak detectors was the 1920s, when battery-operated, multi-dial tuned radio frequency receivers using low-mu triodes with directly heated cathodes were the norm. The Zenith Models 11, 12, and 14 are examples of these kinds of radios.〔(Schematics of Zenith models 11, 12 and 14. ) Three battery-operated Zenith grid-leak models of the 1920s.〕 When indirectly heated cathodes and AC powered receivers were introduced in 1927, most manufacturers switched to plate detectors, and later to diode detectors. Although the regenerative grid-leak detector was one of the more sensitive detectors of its day, its ability to radiate radio frequency energy when improperly adjusted limited its use in urban settings where multiple receivers would be operated in close proximity. The RCA Radiola III and IIIa and the Crosley Model 51 are examples of regenerative receivers from this period. 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「Grid-leak detector」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.