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4215AB

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ID = 19011
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Triode, vacuum   Universal 
Identical to 4215AB = 4001AB
Similar Tubes
Normally replaceable-slightly different:
  4239A
Other base:
  215A ; 215A_Nissl ; 4215A

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 1.1 Volts / If 0.25 Ampere / Direct / Battery =
Description

Similar to the 215A but European B4 socket. According to Tyne, an adaptor was available to convert the base from the standard 215A type to the British B4 base. Later the adaptor gave way to a tube with the B4 base.

 
Information source Saga of the Vacuum Tube, Tyne   p. 370 & 371

b4_1~~80.png 4215AB: Fin Stewart
Fin Stewart


Just Qvigstad
42151.png
4215AB: own collection
Peter den Boer

More ...
Usage in Models 1= 1924

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
 

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