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Hyper-Power-Fourvolt

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ID = 49873
       
Country:
Great Britain (UK)
Brand: Dario - Impex Electrical Ltd. (see also Dario France); London
Tube type:  Triode, vacuum   Power/Output 
Identical to Hyper-Power-Fourvolt
Similar Tubes
Heater different:
  Hyper-Power-Bivolt

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =
Literature - - Manufacturers Literature   Advertisement December 1929
 

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