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T5-442S

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ID = 51820
       
Country:
Netherlands
Brand: Thermion; Netherlands
Developer: Thermion; Netherlands 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to T5-442S
Similar Tubes
Other shape (e.g. bulb type):
  5-442S ; E442S
Production stop Feb.1938

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact screw type
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Description This is a Thermiode, a glass tube in a shielding of nickel-iron alloy to prevent electric or magnetic interference. 
Literature - - Manufacturers Literature   1933
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5442sbase~~1.png
T5-442S
Peter den Boer

 

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