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VT139_GPO

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ID = 64204
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Triode, vacuum   Detector 
  Ca. 1925 up to 1945 very rare. ***
Identical to VT139_GPO = MH4 = CV399 = NR31

Base Europe 5-Pin (O5A, B5)
Was used by Telephony
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel / series AC/DC
Literature -- Collector info (Sammler)   
 
b5~~3.png
VT139_GPO: Fin Stewart
Fin Stewart

 

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