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12K8

Information - Help 
ID = 2632
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Sylvania Products Co. (Tubes) 
Tube type:  Triode-Hexode   Frequency converter   Controlling (mu) 
Identical to 12K8 = CV703
Similar Tubes
Other shape (e.g. bulb type):
  12K8GT
Other class quality (otherwise equal):
  12K8Y
Heater different:
  6K8
First Source (s)
16.Oct.1939 : Electron Tube Registration List
Predecessor Tubes 12A8G  
Successor Tubes 14S7  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ue) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC /
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  12k8.png
  12K8: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
12k8a.jpg
12K8: wiwi
Wilfried Winter

 
Variants
 
12k8.png
12K8: Lorenz Empfänger-Röhren , 9. Auflage
Anonymous 54 Collector

 
12k8_techdata.png
12K8: Original GENERAL ELECTRIC
Josef Pilz


Usage in Models 1= 1939?? ; 1= 1939? ; 2= 1939 ; 1= 1940?? ; 3= 1940? ; 2= 1940 ; 1= 1941?? ; 3= 1941? ; 3= 1941 ; 1= 1942?? ; 1= 1942? ; 1= 1944 ; 1= 1945 ; 1= 1946? ; 1= 1947?? ; 4= 1947 ; 3= 1948?? ; 1= 1948 ; 2= 1949? ; 2= 1949 ; 7= 1950?? ; 3= 1950? ; 1= 1953
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):46

12K8*Box

DE MI COLECION
Justo Puertas-Paule
   

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