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401 Info
Country:  United States of America (USA)      Brand:  Sparks-Withington Co. (Sparton) 
  Tube type:  Triode, vacuum   Universal 
Tube ID = 33550
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Identical to 401
Predecessor Tubes 400  

Base UX-Base (4 Pins (2 thick, USA 1924, UX) 2 Sidecontacts
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel, (AC/DC) / If: 1.35 Ampere / Vf 3 Volts /
Description see Radio College of Canada, Sparton Tube Characteristics. 
Literature Taschenbuch zum Röhren-Codex 1948/49   NOT CORRECT !
Babani, International Radio Tube Encyclopaedia

usa_sparton_401_sparton.jpg
O.F.
Otto Frosinn

 
401_sparton.gif
KoBi
Konrad Birkner

 
Usage in Models   2= 1926 ; 3= 1927 ;
Number of Models with this tube   5
No further Information for

401    

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