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12SA7

Information - Help 
ID = 2634
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (new)   Controlling (mu) 
Identical to 12SA7 = VT-161 = CV537
Similar Tubes
Other shape (e.g. bulb type):
  12SA7G ; 12SA7GT
Other class quality (otherwise equal):
  12SA7Y
Different maximum ratings:
  12SY7
Heater different:
  6SA7
Other base:
  14Q7
First year 1939 -- Collector info (Sammler)
First Source (s)
02.Feb.1939 : Electron Tube Registration List
Predecessor Tubes 12A8G  
Successor Tubes 12BE6   12BA7  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ud)
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC /
Tube prices 4 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  12sa7.png
  12SA7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
12sa7_r20.jpg
12SA7: Collection JR
Jacob Roschy

 
12sa7basediagram.png
12SA7: 12SA7 RCA Data Sheet 1947
Vitor Oliveira

 
12sa7_techdat01.png
12SA7: SEL Handbuch 1964
Peter Hoddow


Usage in Models 4= 1938? ; 2= 1938 ; 10= 1939?? ; 56= 1939? ; 198= 1939 ; 39= 1940?? ; 71= 1940? ; 223= 1940 ; 79= 1941?? ; 76= 1941? ; 274= 1941 ; 48= 1942?? ; 103= 1942? ; 84= 1942 ; 3= 1943? ; 4= 1943 ; 3= 1944 ; 12= 1945?? ; 11= 1945? ; 39= 1945 ; 21= 1946?? ; 76= 1946? ; 524= 1946 ; 59= 1947?? ; 33= 1947? ; 252= 1947 ; 49= 1948?? ; 24= 1948? ; 215= 1948 ; 66= 1949?? ; 32= 1949? ; 100= 1949 ; 71= 1950?? ; 23= 1950? ; 51= 1950 ; 55= 1951?? ; 28= 1951? ; 51= 1951 ; 25= 1952?? ; 36= 1952? ; 44= 1952 ; 16= 1953?? ; 10= 1953? ; 12= 1953 ; 18= 1954?? ; 7= 1954? ; 7= 1954 ; 10= 1955?? ; 3= 1955? ; 1= 1957?? ; 1= 1958?? ; 2= 1959? ; 2= 1960?? ; 1= 1963 ; 1= 1967?? ; 20= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3285


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