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12SQ7

Information - Help 
ID = 2638
       
Country:
United States of America (USA)
Brand:
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to 12SQ7 = VT-104 = CV546 = 12Г2
Similar Tubes
Other shape (e.g. bulb type):
  12SQ7GT
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 / Specified voltage AND current AC/DC
Description

Plus or minus 90 VDC max voltage between cathode and heater by spec.

 
Tube prices 3 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

12sq7.png
12SQ7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †

cv546_so~~5.png 12SQ7: ARRL Handbook 1972
Anonymous 10 Collector

More ...

Just Qvigstad
12sq7_techdat01.png
12SQ7: SEL Handbuch 1964
Peter Hoddow

More ...
Usage in Models 14= 1939?? ; 57= 1939? ; 235= 1939 ; 44= 1940?? ; 91= 1940? ; 229= 1940 ; 82= 1941?? ; 127= 1941? ; 277= 1941 ; 49= 1942?? ; 104= 1942? ; 74= 1942 ; 3= 1943?? ; 7= 1943? ; 4= 1943 ; 14= 1945?? ; 14= 1945? ; 53= 1945 ; 27= 1946?? ; 91= 1946? ; 483= 1946 ; 62= 1947?? ; 40= 1947? ; 256= 1947 ; 57= 1948?? ; 44= 1948? ; 243= 1948 ; 61= 1949?? ; 49= 1949? ; 104= 1949 ; 86= 1950?? ; 47= 1950? ; 43= 1950 ; 59= 1951?? ; 87= 1951? ; 42= 1951 ; 28= 1952?? ; 47= 1952? ; 44= 1952 ; 19= 1953?? ; 16= 1953? ; 17= 1953 ; 21= 1954?? ; 15= 1954? ; 9= 1954 ; 11= 1955?? ; 18= 1955? ; 1= 1955 ; 16= 1956? ; 2= 1956 ; 1= 1957?? ; 6= 1957? ; 1= 1958?? ; 5= 1958? ; 6= 1959? ; 1= 1960?? ; 1= 1960? ; 1= 1963 ; 1= 1967?? ; 1= 2020 ; 1= 9999? ; 20= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3668

Collection of

 
12sq7~~2.jpg

12SQ7
 

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