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ID = 19613
Brand: VATEA; Budapest
Tube type:  Space Charge Tetrode   Frequency converter 
Identical to DU412_Vatea

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Direct / Parallel, (AC/DC)
Dimensions (WHD)
incl. pins / tip
43 x 100 x mm / 1.69 x 3.94 x inch
DU412_Vatea: Tóth Ferenc
Sandor Selyem-Tóth

DU412_Vatea: Funk-Bastler 1928, Heft 41
Hartmut Völler

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