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D100_4pin

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ID = 37231
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to D100_4pin
Similar Tubes
Normally replaceable-slightly different:
  B443_4pin

Base Europe 4-Pin B4 + side contact
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =
Information source -- Collector info (Sammler)   
- - Manufacturers Literature   2-9-1933

b4_tetrode~~17.gif D100_4pin: Fin Stewart
Fin Stewart


Just Qvigstad
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D100_4pin: own collection
Peter den Boer

Collection of

 
d100~~2.jpg

D100_4pin
 

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