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VT40_GPO

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ID = 20331
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to VT40_GPO = CV1647
Similar Tubes
Other base:
  LS5B

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Telephony
Filament Vf 4.5 Volts / If 0.8 Ampere / Direct / Specified voltage AC/DC
Description

Tube manufactured with a Shaw nickel plated base.

 
Information source -- Original-techn. papers.   

uv~~62.png VT40_GPO: Fin Stewart
Fin Stewart


Just Qvigstad

Collection of

 
vt40.jpg

 

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