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12SK7

Country:  United States of America (USA)      Brand:  Common type USA tube/semicond. 
  Developer:  RCA (RCA Victor Co. Inc.); New York (NY) 
  Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Tube ID = 2637
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Identical to 12SK7 = VT-131 = CV543
Similar Tubes Other shape (e.g. bulb type):
 12SK7GT; CV544
Other class quality (otherwise equal):
 12SK7Y; 5661
Heater different:
 6SK7
First year   1939 -- Collector info (Sammler)
First Source (s) 02.Feb.1939 : Electron Tube Registration List
Successor Tubes 12BA6  
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uka)
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If: 0.15 Ampere / -: Indirect /
Description

Plus or minus 90 VDC max insulation between heater and cathode by GE spec sheet.

 
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  12sk7.png
  12SK7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
12sk7_r.jpg
12SK7: collection JR
Jacob Roschy
 
12sk7.png
12SK7: Lorenz Empfänger-Röhren , 9. Auflage
Anonymous 54 Collector
 
12sk7_techdat01.png
12SK7: SEL Handbuch 1964
Peter Hoddow
Usage in Models   4= 1938? ; 2= 1938 ; 11= 1939?? ; 42= 1939? ; 219= 1939 ; 45= 1940?? ; 63= 1940? ; 209= 1940 ; 88= 1941?? ; 98= 1941? ; 230= 1941 ; 46= 1942?? ; 113= 1942? ; 67= 1942 ; 1= 1943?? ; 5= 1943? ; 3= 1943 ; 4= 1944 ; 10= 1945?? ; 8= 1945? ; 44= 1945 ; 26= 1946?? ; 67= 1946? ; 495= 1946 ; 54= 1947?? ; 24= 1947? ; 250= 1947 ; 47= 1948?? ; 26= 1948? ; 200= 1948 ; 63= 1949?? ; 26= 1949? ; 83= 1949 ; 49= 1950?? ; 14= 1950? ; 30= 1950 ; 52= 1951?? ; 22= 1951? ; 42= 1951 ; 23= 1952?? ; 8= 1952? ; 22= 1952 ; 16= 1953?? ; 7= 1953? ; 11= 1953 ; 20= 1954?? ; 9= 1954? ; 3= 1954 ; 7= 1955?? ; 3= 1955? ; 3= 1960?? ; 1= 1963 ; 6= 9999
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   3021
12SK7*Box
    
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