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E425b

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ID = 32116
       
Country:
Austria
Brand: Helikon, Helikonwerk, Ing. Richard Martinek; Wien
Tube type:  TRIODE (Detail uncertain) 
Identical to E425b

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Battery =
Information source -- Original prospect or advert   

b4_base_pins~~638.png E425b: Fin Stewart
Fin Stewart


Just Qvigstad
 

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