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12SR7

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ID = 5445
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to 12SR7 = VT-133 = CV700 = 12Г1
Similar Tubes
Other shape (e.g. bulb type):
  12SR7GT
Normally replaceable-slightly different:
  12SW7
Heater different:
  6SR7
Other base:
  12BF6
First Source (s)
16.Oct.1939 : Electron Tube Registration List
Successor Tubes 12BF6  

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
Tube prices 2 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  12sr7.png
  12SR7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
12sr7_kr.jpg
12SR7: Private collection
Emilio Ciardiello

 
334_4.png
12SR7: Telefunken Werkstattbuch
Wolfgang Bauer

 
12sr7_techdat01.png
12SR7: Sylvania Technical Manual
Peter Hoddow


Usage in Models 1= 1939?? ; 1= 1939? ; 1= 1939 ; 1= 1940?? ; 3= 1941? ; 4= 1943 ; 1= 1944 ; 3= 1945 ; 1= 1946?? ; 1= 1946 ; 1= 1948?? ; 1= 1950?? ; 1= 1951 ; 1= 1953 ; 1= 1959

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):22


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