radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

12SK7

Information - Help 
ID = 2637
       
Country:
United States of America (USA)
Brand:
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) backed up by >200 models with dated ads etc.
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 / Specified voltage AND current AC/DC
Description

Plus or minus 90 VDC max insulation between heater and cathode by GE spec sheet.

 
Tube prices 5 Tube prices (visible for members only)
Information source 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 †

12sk7basediagram.png 12SK7: 12SK7 RCA Data Sheet 1947
Vitor Oliveira

More ...

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

More ...
Usage in Models 12= 1939?? ; 52= 1939? ; 226= 1939 ; 45= 1940?? ; 79= 1940? ; 216= 1940 ; 84= 1941?? ; 118= 1941? ; 251= 1941 ; 46= 1942?? ; 104= 1942? ; 66= 1942 ; 3= 1943?? ; 9= 1943? ; 9= 1943 ; 1= 1944? ; 4= 1944 ; 14= 1945?? ; 15= 1945? ; 57= 1945 ; 28= 1946?? ; 78= 1946? ; 489= 1946 ; 61= 1947?? ; 45= 1947? ; 254= 1947 ; 55= 1948?? ; 38= 1948? ; 193= 1948 ; 52= 1949?? ; 45= 1949? ; 85= 1949 ; 81= 1950?? ; 30= 1950? ; 28= 1950 ; 46= 1951?? ; 60= 1951? ; 34= 1951 ; 26= 1952?? ; 20= 1952? ; 19= 1952 ; 16= 1953?? ; 9= 1953? ; 11= 1953 ; 19= 1954?? ; 16= 1954? ; 4= 1954 ; 11= 1955?? ; 16= 1955? ; 1= 1955 ; 12= 1956? ; 1= 1957?? ; 1= 1958?? ; 4= 1958? ; 2= 1960?? ; 1= 1963 ; 1= 1967?? ; 1= 2020 ; 1= 9999? ; 17= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3322

Collection of

 
12sk7_444rm400b.jpg

12SK7
 

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  

Data Compliance More Information