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221D

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ID = 28961
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Triode, vacuum   Universal 
Identical to 221D = UV201A
First year 1926 Saga of the Vacuum Tube, Tyne page 295-297

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =
Description

Designed for Northern Electric of Canada. A Western Elecric tube has been found in the Pat Dowd collection. Equivalent of the RCA UV201A tube

 
Information source Tube Lore (II)   p. 235
Saga of the Vacuum Tube, Tyne   p. 295, 297 & 298

uvsockel_5~~2.png 221D: KoBi
Konrad Birkner † 12.08.2014


Just Qvigstad
tubedata1923~~18.png
221D: KoBi
Konrad Birkner † 12.08.2014

Collection of

 
screenshot_20211010_210234_gallery.jpg

221D
 

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