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U408D

Information - Help 
ID = 13107
       
Country:
Germany
Brand: Valvo Radioröhrenfabrik GmbH; Hamburg
Tube type:  Space Charge Tetrode 
Identical to U408D
Similar Tubes
Normally replaceable-slightly different:
  RO4141
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 (A, 4A, B4, since 1914) (Codex=Eu) Sidecontact
Filament Vf 4 Volts / If 0.08 Ampere / Direct / Battery =
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
u408d_sock.png
U408D: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
u408d_spec.png
U408D: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


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