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P220A_Mazda

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ID = 20930
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Developer: Mazda = Valve (Tube) brand GB (see also France) 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to P220A_Mazda = VT69_GPO = CV1652
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Specified voltage AND current AC/DC
Information source Babani, International Radio Tube Encyclopaedia   Pages 124 &125
History of the British Radio Valve to 1940   p. 148 & 167
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
b4_1~~37.png P220A_Mazda: Fin Stewart
Fin Stewart

Just Qvigstad
Usage in Models 1= 1931
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

Rudolf Osterkamp (D)
 
p220a_mazda_bild1.jpg

P220A_Mazda
 
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