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Information - Help 
ID = 2950
Brand: Common type Worldwide tube/semicond.
Developer: National Union Radio Corp.; Orange (NJ) 
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to 12Q7G
Similar Tubes
Other shape (e.g. bulb type):
  12Q7GM ; 12Q7GT ; 12Q7MGT
Heater different:
Heater and shape different:
First year 22.May.1939 Electron Tube Registration List
Predecessor Tubes 6Q7G   12Q7GT  
Successor Tubes 12SQ7   12SQ7GT  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Specified voltage AND current AC/DC
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   

337_2~~7.png 12Q7G: Telefunken Werkstattbuch
Wolfgang Bauer

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Just Qvigstad
Usage in Models 1= 1939? ; 4= 1939 ; 8= 1940? ; 29= 1940 ; 2= 1941? ; 1= 1942 ; 2= 1943 ; 8= 1945? ; 2= 1946?? ; 2= 1948? ; 1= 1950??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):60

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