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VT23_GPO

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ID = 63033
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Triode, vacuum 
  <1925 very rare. ***
Identical to VT23_GPO

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Telephony
Filament Direct
Description

Small triode tube used by the British Post Office as a repeater tube in telephony. First made 1922 - only 134 tubes manufactured.

 
Information source British Radio Valves - The Vintage Years: 1904-1925   Pages 83 and 133

b4~~12.png VT23_GPO: Fin Stewart
Fin Stewart


Just Qvigstad
 

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