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ID = 20886
Tube type:  Oscilloscope CRT, picture tube   Indication 
Identical to DB7-11 = 3BYP11
Similar Tubes
Normally replaceable-slightly different:
  DG7-11 ; DH7-11 ; DN7-11 ; DP7-11

Base OTHER TUBEBASE in general
Filament Vf 6.3 Volts / If 0.095 Ampere / Indirect / Parallel, (AC/DC) /
Description Ablenkung symmetrisch 
Text in other languages (may differ)
Literature Röhren-Taschen-Tabelle, (Franzis RTT)   

DB7-11: RTT Schwandt
Günther Stabe

DB7-11: Lorenz Handbuch 1964
Mark Hippenstiel

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