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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   
Tube Tester Data Avo CT160
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?? ; 59= 1939? ; 234= 1939 ; 45= 1940?? ; 93= 1940? ; 229= 1940 ; 82= 1941?? ; 133= 1941? ; 284= 1941 ; 50= 1942?? ; 104= 1942? ; 74= 1942 ; 3= 1943?? ; 7= 1943? ; 4= 1943 ; 14= 1945?? ; 14= 1945? ; 53= 1945 ; 26= 1946?? ; 92= 1946? ; 484= 1946 ; 62= 1947?? ; 46= 1947? ; 254= 1947 ; 57= 1948?? ; 44= 1948? ; 247= 1948 ; 62= 1949?? ; 55= 1949? ; 104= 1949 ; 88= 1950?? ; 52= 1950? ; 40= 1950 ; 60= 1951?? ; 74= 1951? ; 34= 1951 ; 26= 1952?? ; 75= 1952? ; 22= 1952 ; 19= 1953?? ; 46= 1953? ; 14= 1953 ; 21= 1954?? ; 15= 1954? ; 9= 1954 ; 11= 1955?? ; 17= 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):3716

Collection of

Christian Schaufelberger (CH)
Götz Linss † 27.06.21 (D)
Jacob Roschy (D)
Tor Steinnes (N)
Peter Pfeiffer (D)
Bruno Candreia (CH)
Emilio Focosi (I)
George Papaiz (CDN)
Aldo Patriarca (CH)
Shaun Merrigan (CDN)
Hans-Werner Ellerbrock (D)
Bekir Yurdakul (F)
Georges Werts (B)
David Erali (USA)
Valery Gromov (RUS)
Massimo Pedrina (I)
Wolfgang Bauer (A)
Ottmar Rollmann (D)
Stig Comstedt (S)
Karlheinz Fischer (D)
Emilio Ciardiello (I)
Hannu Alho (FIN)
Bruce Morgenstern (CDN)
Robert Gillespie (USA)
Collection of a member from D
Museum Roggenhofer (A)
 
12sq7~~2.jpg

12SQ7
 
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