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UY221

Information - Help 
ID = 83701
       
 
   
Tube type:  Triode, vacuum 
Identical to UY221
First Source (s)
Jun.1929 : Radio Retailing (Radio & Television R.)

Base UY-Base, 5 Pins (USA, April 1927)
Was used by Radio/TV-reception etc.
Filament Indirect
Description

With renewable heating unit.

 
Text in other languages (may differ)


Just Qvigstad
usa_quinn_tube_typ_uy221.png
UY221: Internet
Peter Kahlich

Collection of

 
uy221_rm_org.jpg

 

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