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U208D

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ID = 13105
       
Country:
Germany
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Space Charge Tetrode 
Identical to U208D
Similar Tubes
Normally replaceable-slightly different:
  D210_Triotron
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Sep.1927 : Funk Bastler 1927 Heft 39

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eu) Sidecontact.
Filament Vf 1.7 Volts / If 0.08 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   

u208d_application.png
U208D: Valvo-Röhren Prospekt/Datenheft ca. 1933
Achim Dassow

u208d_so.png U208D: rtt
Anonymous 10 Collector


Just Qvigstad
u208d_spec.png
U208D: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

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Collection of

 
u208dre062.jpg

 

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