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ID = 21575
Tube type:  Beam Power Tube 
Identical to YL1290
Similar Tubes
Heater different:
  QE08/200 ; QE08/200H

Base SPECIAL TUBEBASE in general Top contact with a cap
Filament Vf 19 Volts / If 1.4 Ampere / Indirect / Parallel, (AC/DC)
Literature Röhren-Taschen-Tabelle, (Franzis RTT)   
YL1290: RTT Schwandt
Günther Stabe

YL1290: Valvo,Senderöhren, 1983
Anonymous 15 Collector

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