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12SQ7

Information - Help 
ID = 2638
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
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 / Parallel / series 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)
Literature 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 †
 
12sq7~~2.jpg
12SQ7: Sammlung PR
Peter Roggenhofer

 
cv546_so~~5.png
12SQ7: ARRL Handbook 1972
Michael Schlör

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


Usage in Models 2= 1938? ; 2= 1938 ; 15= 1939?? ; 52= 1939? ; 233= 1939 ; 42= 1940?? ; 84= 1940? ; 231= 1940 ; 82= 1941?? ; 115= 1941? ; 275= 1941 ; 49= 1942?? ; 102= 1942? ; 78= 1942 ; 3= 1943? ; 4= 1943 ; 12= 1945?? ; 8= 1945? ; 44= 1945 ; 24= 1946?? ; 78= 1946? ; 492= 1946 ; 58= 1947?? ; 26= 1947? ; 257= 1947 ; 51= 1948?? ; 33= 1948? ; 244= 1948 ; 65= 1949?? ; 36= 1949? ; 109= 1949 ; 69= 1950?? ; 29= 1950? ; 57= 1950 ; 60= 1951?? ; 42= 1951? ; 61= 1951 ; 26= 1952?? ; 37= 1952? ; 47= 1952 ; 20= 1953?? ; 15= 1953? ; 14= 1953 ; 22= 1954?? ; 9= 1954? ; 9= 1954 ; 10= 1955?? ; 5= 1955? ; 3= 1956? ; 2= 1956 ; 1= 1957?? ; 1= 1957? ; 1= 1958?? ; 1= 1958? ; 6= 1959? ; 2= 1960?? ; 1= 1960? ; 1= 1963 ; 1= 1967?? ; 18= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3476


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