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B230_Hivac

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ID = 25911
       
Country:
Great Britain (UK)
Brand: Hivac Ltd.; Harrow-on-the-Hill
Tube type:  Double Triode   Audio Frequency 
Identical to B230_Hivac = B21
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base British-7-Pin, old (M7A)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Battery =
Information source History of the British Radio Valve to 1940   p. 146 &167

b7pen~~2.png B230_Hivac: Fin Stewart
Fin Stewart


Just Qvigstad
 
b230.png

 

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