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K77A

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ID = 15918
       
Country:
Great Britain (UK)
Brand: Ever Ready Co. (GB) Ltd.; London
Tube type:  Double Triode   Power/Output 
Identical to K77A = QP22A

Base B9 British 9-Pin
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.5 Ampere / Direct
Information source History of the British Radio Valve to 1940   p. 142
Babani, International Radio Tube Encyclopaedia   P. 112 & 113
Taschenbuch zum Röhren-Codex 1948/49

s_414_g_1.gif K77A: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20


Just Qvigstad
Usage in Models 2= 1935 ; 2= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of

 
k77a.jpg

 

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