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12Q7

Information - Help 
ID = 2949
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Diode-Triode   Detector 
Identical to 12Q7

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament
Description

There is no metal tube 12Q7, see under 12Q7G or 12Q7GT

 
Text in other languages (may differ)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  12q7.png
  12Q7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
337_7.png
12Q7: Telefunken Werkstattbuch
Wolfgang Bauer

 

Usage in Models 1= 1938? ; 7= 1939?? ; 4= 1939? ; 10= 1939 ; 2= 1941? ; 1= 1941 ; 1= 1942? ; 1= 1942 ; 1= 1945?? ; 2= 1946?? ; 3= 1946? ; 4= 1946 ; 1= 1947?? ; 1= 1947? ; 4= 1947 ; 2= 1948?? ; 3= 1948? ; 2= 1948 ; 2= 1949?? ; 4= 1949? ; 4= 1949 ; 6= 1950?? ; 1= 1950? ; 1= 1951

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):68

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