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5-438

Information - Help 
ID = 13280
       
Country:
Netherlands
Brand: Thermion; Netherlands
Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Identical to 5-438 = E438
Similar Tubes
Other shape (e.g. bulb type):
  T5-438
Production stop Feb.1938
Predecessor Tubes I503  

Base Europe 5-Pin (O5A, B5) (Codex=F)
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1933
 
5_438_1.jpeg
5-438: Photo of tube from my collection - TS
Tomasz Szczesniak

 
7_110.png
5-438: Telefunken Werkstattbuch
Wolfgang Bauer

 
5438data1.png
5-438: own collection
Peter den Boer



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