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Xtraudion_4V_GP

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ID = 30890
       
Country:
Great Britain (UK)
Brand: Economic Electric; London
Developer: Economic Electric; London 
Tube type:  Triode, vacuum   Universal 
Identical to Xtraudion_4V_GP
Similar Tubes
Normally replaceable-slightly different:
  Xtraudion_4V_HF
First Source (s)
1923 : British Radio Valves - The Vintage Years: 1904-1925 4,41

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.4 Ampere / Direct / Battery =
Description

Bright emitter. By 1924 supplanted by dull emitter Dextraudions.

 

b4_base_pins~~207.png Xtraudion_4V_GP: Fin Stewart
Fin Stewart


Just Qvigstad
 

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