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GT138

Information - Help 
ID = 7914
       
Country:
Germany
Brand: TeKaDe (TKD), Süddeutsche Telefon-Apparate- Kabel- und Drahtwerke; Nürnberg
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to GT138 = 505
Similar Tubes
Normally replaceable-slightly different:
  R0446
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Mar.1929 : Funk Bastler 1929, Heft 9

Base Europe 3-Pin (B3, H) (Codex=Eo)
Filament Vf 4 Volts / If 1 Ampere / Direct / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
gt138_sock.png
GT138: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
gt138_spec.png
GT138: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


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