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ID = 604
Brand: Ostar (Gustav Ganz); Wien
Developer: Ostar (Gustav Ganz); Wien 
Tube type:  Triode, vacuum   Universal 
Identical to U920_Ostar
First Source (s)
Sep.1931 : Funk Bastler 1931 Heft 41

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Filament Vf 225 Volts / If 0.03 Ampere / Indirect / Specified current AC/DC ~ = (Series working)

This tube was available for heater voltages of 115, 155 or 230 volts, or at customer's order for any voltage from 20 to 250 volts.

Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   
Saga of the Vacuum Tube, Tyne
U920_Ostar: Collection TL
Thomas Lebeth

U920_Ostar: Telefunken Werkstattbuch
Wolfgang Bauer

U920_Ostar: Ostar Werbeschrift
Thomas Lebeth

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