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29_Cyrnos

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ID = 30916
       
Country:
France
Brand: Cyrnos (brand) - see also MCB
Tube type:  Vacuum Pentode   Frequency converter 
  Late but very rare. ***
Identical to 29_Cyrnos
First Source (s)
1930 : Saga of the Vacuum Tube, Tyne p.411

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 2 Sidecontacts.
Filament Direct / Battery =
Description space charge Trigrille "Labo" series. 
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