Antique radios, Old Time Radios

12K8

ID = 2632

Country:

United States of America (USA)

Brand:	Common type USA tube/semicond.
Developer:
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	4 Tube prices (visible for members only)
Information source	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	12K8: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †

12K8: wiwi
Wilfried Winter

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

12K8: Original GENERAL ELECTRIC
Josef Pilz

from Just Qvigstad

Usage in Models

1= 1939?? ; 1= 1939? ; 2= 1939 ; 2= 1940?? ; 2= 1940? ; 2= 1940 ; 2= 1941?? ; 3= 1941? ; 3= 1941 ; 1= 1942?? ; 1= 1942? ; 4= 1943 ; 1= 1944 ; 1= 1945 ; 1= 1946? ; 1= 1947?? ; 4= 1947 ; 3= 1948?? ; 1= 1948 ; 2= 1949? ; 2= 1949 ; 9= 1950?? ; 3= 1950? ; 1= 1952?? ; 1= 1953

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):54

Collection of Jacob Roschy (D)

Collection of Roland Biesler (D)

Collection of Karlheinz Fischer (D)

Collection of Valery Gromov (RUS)

Collection of Georges Werts (B)

Collection of Wilfried Winter (D)

Collection of a member from FIN

Collection of Justo Puertas-Paule (E)

Collection of Antonio Rabitti (BR)

Collection of a member from D

Collection of David Erali (USA)

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