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ID = 2939
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to Z63 = 6J7G
First year 16.Jul.1937 Wireless World (The), London (WW, 79) 1937

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uf)
Filament Vf 6.3 Volts / If 0.3 Ampere / Parallel / series AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   
Z63: Private collection
Emilio Ciardiello

Z63: Telefunken Werkstattbuch
Wolfgang Bauer

Z63: own collection
Peter den Boer

from Just Qvigstad

Usage in Models 10= 1937 ; 1= 1938? ; 3= 1938 ; 2= 1939 ; 1= 1948 ; 2= 1949 ; 4= 1950 ; 1= 1955??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):24

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