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ID = 57851
United States of America (USA)
Brand: DeForest-Tubes
Developer: DeForest-Tubes 
Tube type:  Triode, vacuum 
  <1925 rare.
Identical to Audion_sw

Base Edison (candelabra) 12 mm Wires only.
Was used by Radio/TV-reception etc.
Filament Direct / Battery =
Tube prices 6 Tube prices (visible for members only)

Audion_sw: US Patent Office
Pavek Museum

Collection of



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