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ID = 21923
Brand: Werk für Fernmeldewesen (OSW, HF, WF) Berlin, VEB, RFT (Ostd.)
Tube type:  LOCKED OFF PART (CODE 9) - see in Notes   Power/Output 
Identical to 2582_OSW = OSW2582
Similar Tubes
Normally replaceable-slightly different:

Base SPECIAL TUBEBASE in general
Filament Vf 12.6 Volts / If 0.55 Ampere / Indirect / Specified voltage AC/DC
Description Bezeichnung vom Hersteller: OSW2582 (siehe dort). Breitband-HF-Verstärker, Anode: 250 V und 72 mA und 8,5 W, Schirmgitter: 250 V und 9,5 mA, Steuergitter: -7 V, 
Information source Taschenbuch zum Röhren-Codex 1948/49   RTB Beier 1953
Röhren-Taschen-Tabelle, (Franzis RTT)   

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