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12SF7

Information - Help 
ID = 2822
       
Country:
United States of America (USA)
Brand:
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 12SF7 = CV921
Similar Tubes
Other shape (e.g. bulb type):
  12SF7GT
Heater different:
  6SF7
First year 03.Mar.1941 Electron Tube Registration List
Predecessor Tubes 12C8  
Successor Tubes 12CR6  

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 3 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  12sf7.png
  12SF7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
12sf7~~1.jpg
12SF7: 12SF7_RCA
Patrice Follet

 
386_1.png
12SF7: Telefunken Werkstattbuch
Wolfgang Bauer

 
12sf7_techdat01.png
12SF7: Sylvania Technical Manual
Peter Hoddow


Usage in Models 1= 1938?? ; 1= 1940?? ; 1= 1941? ; 4= 1941 ; 1= 1942? ; 1= 1942 ; 4= 1943 ; 6= 1945? ; 5= 1945 ; 2= 1946? ; 40= 1946 ; 2= 1947?? ; 3= 1947? ; 11= 1947 ; 2= 1948?? ; 4= 1948 ; 12= 1949?? ; 2= 1949? ; 5= 1949 ; 4= 1950?? ; 1= 1950? ; 1= 1950 ; 2= 1951?? ; 3= 1951? ; 2= 1952? ; 1= 1954

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):121


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