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12SQ7

Country:  United States of America (USA)      Brand:  Common type USA tube 
  Tube type:  Double Diode-Triode   Audio Frequency 
Tube ID = 2638
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Identical to 12SQ7 = VT-104
Similar Tubes Other shape (e.g. bulb type):
 12SQ7GT
Other class quality (otherwise equal):
 CV546
Heater different:
 6SQ7
First year   1939 -- Collector info (Sammler)
First Source (s) Feb.1939 : Electron Tube Registration List
Predecessor Tubes 12Q7G   12Q7GT  
Successor Tubes 12AT6  
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk)
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If: 0.15 Ampere / -: Indirect / -: Series, AC/DC /
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  12sq7.gif
  12SQ7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
tube_12sq7.jpg
12SQ7
Anonymous 782 Collector
 
cv546_so~~5.png
12SQ7: ARRL Handbook 1972
Michael Schlör
 
12sq7_techdat01.png
12SQ7: SEL Handbuch 1964
Peter Hoddow
Usage in Models   1= 1934?? ; 1= 1934 ; 2= 1938? ; 2= 1938 ; 12= 1939?? ; 50= 1939? ; 220= 1939 ; 42= 1940?? ; 71= 1940? ; 210= 1940 ; 93= 1941?? ; 108= 1941? ; 250= 1941 ; 49= 1942?? ; 113= 1942? ; 81= 1942 ; 3= 1943? ; 3= 1943 ; 7= 1945?? ; 9= 1945? ; 39= 1945 ; 23= 1946?? ; 73= 1946? ; 491= 1946 ; 56= 1947?? ; 23= 1947? ; 236= 1947 ; 48= 1948?? ; 28= 1948? ; 245= 1948 ; 66= 1949?? ; 32= 1949? ; 109= 1949 ; 52= 1950?? ; 26= 1950? ; 57= 1950 ; 63= 1951?? ; 42= 1951? ; 51= 1951 ; 25= 1952?? ; 35= 1952? ; 45= 1952 ; 19= 1953?? ; 14= 1953? ; 12= 1953 ; 23= 1954?? ; 9= 1954? ; 6= 1954 ; 8= 1955?? ; 5= 1955? ; 2= 1955 ; 2= 1956? ; 2= 1956 ; 1= 1957? ; 1= 1958? ; 6= 1959? ; 2= 1960?? ; 1= 1963 ; 2= 9999
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   3307
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