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Resistron-Fourvolt

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ID = 49869
       
Country:
Great Britain (UK)
Brand: Dario - Impex Electrical Ltd. (see also Dario France); London
Tube type:  Triode, vacuum   Audio Frequency 
Identical to Resistron-Fourvolt
Similar Tubes
Heater different:
  Resistron-Bivolt

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.075 Ampere / Direct / Battery =
Information source - - Manufacturers Literature   Advertisement Dec 1929


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