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Sw20

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ID = 32128
       
Country:
Austria
Brand: Helikon, Helikonwerk, Ing. Richard Martinek; Wien
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to Sw20

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Transmittertube (Radio)
Filament Vf 4.5 Volts / Direct
Information source -- Original prospect or advert   ÖRA, Sept. 1927, S XIII


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