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424

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ID = 12452
       
Country:
United States of America (USA)
Brand:
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to 424 = 24 = F224 = ER224 = CL-24 = GSY224 = A.C.224

Base UY-Base, 5 Pins (USA, April 1927) (Codex=Ha)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.75 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
deforest_424.jpg
424: O.F.
Otto Frosinn

 
s_225_g_8.gif
424: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

 

Usage in Models 2= 1929??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2



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