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12K8

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ID = 2632
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
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 year 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 / Specified voltage AND current AC/DC
Tube prices 4 Tube prices (visible for members only)
Information source 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 †
8k_15.png 12K8
Emilio Ciardiello
More ...
Just Qvigstad 		12k8_techdata.png
12K8: Original GENERAL ELECTRIC
Josef Pilz
More ...
Usage in Models 1= 1939? ; 2= 1939 ; 3= 1940?? ; 2= 1940? ; 2= 1940 ; 2= 1941?? ; 3= 1941? ; 3= 1941 ; 1= 1942?? ; 1= 1942? ; 6= 1943 ; 1= 1944 ; 1= 1945 ; 1= 1946? ; 1= 1947?? ; 4= 1947 ; 4= 1948?? ; 1= 1948 ; 2= 1949? ; 2= 1949 ; 10= 1950?? ; 3= 1950? ; 1= 1952??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):57

Collection of

Antonio Rabitti (BR)
Georges Werts (B)
Karlheinz Fischer (D)
Roland Biesler (D)
Collection of a member from FIN
Collection of a member from D
David Erali (USA)
Wilfried Winter (D)
Jacob Roschy (D)
Valery Gromov (RUS)
Justo Puertas-Paule (E)
Collection of a member from FIN
 
12k8a.jpg

12K8
 
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