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VT109_GPO

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ID = 65172
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: Mazda = Valve (Tube) brand GB (see also France) 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
  Ca. 1925 up to 1945 very rare. ***
Identical to VT109_GPO = AC/S2 = CV1677
Similar Tubes
Normally replaceable-slightly different:
  AC/SG
Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact with a cap.
Was used by Telephony
Filament Vf 4 Volts / If 1.1 Ampere / Indirect / Specified voltage AND current AC/DC
Information source -- Collector info (Sammler)   
9_10~~4.png VT109_GPO: Fin Stewart
Fin Stewart

Just Qvigstad
 
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