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4239A

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ID = 50125
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   Audio Frequency 
  <1925 very rare. ***
Identical to 4239A
Similar Tubes
Normally replaceable-slightly different:
  239A ; 4215AB

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Industrial
Filament Vf 1 Volts / If 0.27 Ampere / Direct / Battery =

ux_base_standard~~400.png 4239A: Fin Stewart
Fin Stewart


Just Qvigstad
4239a1.png
4239A: own collection
Peter den Boer

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Collection of

 
4239astandardtelephonesandcablesltd.stc_1_klein_klein.jpg

4239A
 

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