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T5-447

Information - Help 
ID = 10291
       
Country:
Netherlands
Brand: Thermion; Netherlands
Tube type:  Vacuum Pentode   Controlling (mu) 
  Ca. 1925 up to 1945 rare.
Identical to T5-447
Similar Tubes
Other shape (e.g. bulb type):
  5-447 ; E447
Production stop Feb.1938

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fco) Top contact screw type.
Filament Vf 4 Volts / If 1 Ampere
Description This is a Thermiode, a glass tube in a shielding of nickel-iron alloy to prevent electric or magnetic interference. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   1933
 
5447base~~1.png
T5-447
Peter den Boer

 

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