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VO

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ID = 21481
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Developer: Grammont (Radiofotos, Fotos); Paris, Malakoff 
Tube type:  LOCKED OFF PART (CODE 9) - see in Notes 
Identical to VO
Similar Tubes
Normally replaceable-slightly different:
  A441 ; RE074d ; T_Adzam
First year 1924 ? Saga of the Vacuum Tube, Tyne page 401 Photo
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Sidecontact.
Description

Tyne zeigt auf Seite 401 Fig.19-6 vermutlich die Röhre V0, mit 3-Stift Sockel. Keine Bigrille-Röhre.
Im Text wird VO nicht weiter erwähnt.

 
tubeenvdiag_klein_re074d_1~~1.png
VO: H. Börner
Wolfgang Holtmann
2_3~~2.png VO: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
 
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