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Audion_BTH-doubleW

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ID = 82592
       
Country:
Great Britain (UK)
Brand: BTH (B.T.H.), British Thomson-Houston Co, Ltd.
Developer: DeForest-Tubes 
Tube type:  Triode, vacuum   Detector 
  <1925 very rare. ***
Identical to Audion_BTH-doubleW

Base Edison (candelabra) 12 mm Other combinations of connections.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / Direct / Battery =
Description

This is a twin anode and grid type with wire leads, usually referred to as "double wing" in the U. S. It is an exact copy of the de Forest "double wing" Audion. An interesting observation about the origins of the tube is that these may have been imported from the US and rebranded before BTH had perfected their own tubes. This would explain the BTH logo on the tube.

 
Information source -- Collector info (Sammler)   National Valve Museum, UK

 
bth_audion_double_wing_2.jpg

Audion_BTH-doubleW
 

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