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VT171_GPO

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ID = 64589
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 very rare. ***
Identical to VT171_GPO = Cv1719
Similar Tubes
Normally replaceable-slightly different:
  U22

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Top contact with a cap.
Was used by Telephony
Filament Vf 2 Volts / If 2 Ampere / Indirect / Specified voltage AC/DC
Information source -- Collector info (Sammler)   

u22_sock~~1.png VT171_GPO: Fin Stewart
Fin Stewart


Just Qvigstad
 

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