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N31

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ID = 12833
       
Country:
Great Britain (UK)
Brand:
Tube type:  Vacuum Pentode   Power/Output 
Identical to N31 = PTS = KT31
Successor Tubes KT31  

Base British-7-Pin, old (M7A) (Codex=N) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 26 Volts / If 0.3 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Description

Also available with 13 v, .6 a heater.

 
Information source The Saga of Marconi Osram Valve   p. 333
History of the British Radio Valve to 1940   p. 147 & 189
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

n31_sock.png N31: Frank Philipse
Wolfgang Holtmann


Just Qvigstad
Usage in Models 6= 1935 ; 1= 1936? ; 7= 1936 ; 4= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):18

Collection of

 
gecovalve_n31_bild1.jpg

N31
 

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