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・ WD 2359-434
・ WD Anywhere Access
・ WD Austerity 2-10-0
・ WD Austerity 2-10-0 73755 Longmoor
・ WD Austerity 2-8-0
・ WD Austerity 2-8-0 79257
・ WD ex-LMS Fowler Class 3F
・ WD J0651+2844
・ WD Mersey
・ WD postcode area
・ Wd repeat domain 91
・ WD repeat-containing protein 11
・ WD repeat-containing protein 77
・ WD Scott
・ WD TV
WD-11
・ WD-40
・ WD-40 Company
・ WD40
・ WD40 repeat
・ WDA
・ Wda
・ Wda Landscape Park
・ Wda Świecie
・ Wda, Pomeranian Voivodeship
・ WDAB
・ WDAC
・ WDAD
・ WDAE
・ WDAF


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WD-11 : ウィキペディア英語版
WD-11
The WD-11 vacuum tube, a triode, was introduced by the Westinghouse Electric corporation in 1922 for their Aeriola RF model radio and found use in other contemporary regenerative receivers (used as a detector-amplifier) including the Regenoflex and Radiola series.
The WD11 and "RCA-11" (and later simply named "11" by RCA and Philips/Miniwatt) have the following characteristics:

==Drawbacks==
The WD-11's design was somewhat ill thought out, when the filament burns out it has a tendency to contact the plate, feeding high voltages back through the heater circuitry. It was replaced just a year later by higher performance tubes which were less likely to encounter this problem, Westinghouse Electric's WD-12 and General Electric's UX-199. No radios using the WD-11 tube were designed after 1924, RCA ceased production and issued a service bulletin describing how to retrofit existing sets to use the newer UX-199 triodes.

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「WD-11」の詳細全文を読む



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