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12SK7

Information - Help 
ID = 2637
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 12SK7 = VT-131 = CV543
Similar Tubes
Other shape (e.g. bulb type):
  12SK7GT ; CV544
Other class quality (otherwise equal):
  12SK7Y ; 5661
Heater different:
  6SK7
First year 1939 -- Collector info (Sammler)
First Source (s)
02.Feb.1939 : Electron Tube Registration List
Successor Tubes 12BA6  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uka)
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 insulation between heater and cathode by GE spec sheet.

 
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  12sk7.png
  12SK7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
12sk7_r.jpg
12SK7: collection JR
Jacob Roschy

 
Variants
 
8n_28.png
12SK7
Emilio Ciardiello

 
12sk7_techdat01.png
12SK7: SEL Handbuch 1964
Peter Hoddow


Usage in Models 3= 1938? ; 2= 1938 ; 11= 1939?? ; 43= 1939? ; 221= 1939 ; 45= 1940?? ; 71= 1940? ; 217= 1940 ; 87= 1941?? ; 106= 1941? ; 248= 1941 ; 46= 1942?? ; 101= 1942? ; 66= 1942 ; 1= 1943?? ; 5= 1943? ; 3= 1943 ; 4= 1944 ; 12= 1945?? ; 8= 1945? ; 45= 1945 ; 25= 1946?? ; 66= 1946? ; 494= 1946 ; 56= 1947?? ; 25= 1947? ; 250= 1947 ; 49= 1948?? ; 26= 1948? ; 192= 1948 ; 62= 1949?? ; 30= 1949? ; 83= 1949 ; 53= 1950?? ; 14= 1950? ; 31= 1950 ; 46= 1951?? ; 30= 1951? ; 43= 1951 ; 23= 1952?? ; 8= 1952? ; 20= 1952 ; 17= 1953?? ; 7= 1953? ; 12= 1953 ; 20= 1954?? ; 9= 1954? ; 3= 1954 ; 7= 1955?? ; 3= 1955? ; 1= 1957?? ; 3= 1960?? ; 1= 1963 ; 15= 9999
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3069

12SK7*Box

Eigene Sammlung
Aldo Patriarca
   

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