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P425A

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ID = 19044
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 very rare. ***
Identical to P425A
Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Telephony
Filament Direct / Specified voltage AND current AC/DC
uv~~33.png P425A: Fin Stewart
Fin Stewart

Just Qvigstad
Usage in Models 1= 1925? ; 1= 1926
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
 
standard_p425a.jpg

 
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