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P425_BSA

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ID = 68908
       
Country:
Great Britain (UK)
Brand: BSA Radio Ltd. (B.S.A.); Birmingham
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  Triode, vacuum   Universal 
Identical to P425_BSA

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.26 Ampere / Direct / Battery =
Description

Filament rated 3.5 to 4.4V at 0.25 to 0.28A.

Va <130.

Ra 5 to 7k ohms Amplification factor 6.4 to 6.8.

An STC tube first marketed by BSA-Standard in 1926

 
Tube prices 1 Tube prices (visible for members only)
Information source British Radio Valves - The Classic Years: 1926-1946   Supplement, p. 13

b4_base_pins~~130.png P425_BSA: Fin Stewart
Fin Stewart


Just Qvigstad

Collection of

 
20200226_192151.jpg

P425_BSA
 

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