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ID = 3744
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Triode, vacuum   Universal 
Identical to XXL
Similar Tubes
Other class quality (otherwise equal):

Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC /
Literature Taschenbuch zum Röhren-Codex 1948/49   

XXL: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

XXL: Raytheon Manual
Heinz Höger

Usage in Models 29= 1940 ; 1= 1941? ; 25= 1941

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):55

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