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12K7

Information - Help 
ID = 2820
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 12K7 = 12K7GT
Similar Tubes
Normally replaceable-slightly different:
  12K7G
Heater different:
  6K7
Successor Tubes 12NK7GT  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uf)
Was used by Radio/TV-reception etc.
Filament
Description

There is no metal tube 12K7, see under 12K7G or 12K7GT

 
Text in other languages (may differ)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  12k7.png
  12K7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
374_7.png
12K7: Telefunken Werkstattbuch
Wolfgang Bauer

 

Usage in Models 1= 1938? ; 8= 1939?? ; 4= 1939? ; 12= 1939 ; 2= 1940?? ; 9= 1940? ; 4= 1940 ; 1= 1941?? ; 2= 1941? ; 2= 1941 ; 2= 1942? ; 1= 1942 ; 1= 1943 ; 1= 1944?? ; 1= 1945?? ; 1= 1945? ; 1= 1946? ; 1= 1946 ; 1= 1947?? ; 5= 1947 ; 1= 1948?? ; 1= 1948? ; 1= 1948 ; 1= 1949?? ; 3= 1949? ; 1= 1949 ; 6= 1950?? ; 1= 1950? ; 2= 1953

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):77

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