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5-443H

Information - Help 
ID = 51776
       
Country:
Netherlands
Brand: Thermion; Netherlands
Developer: Thermion; Netherlands 
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to 5-443H
Similar Tubes
Normally replaceable-slightly different:
  E443H
Production stop Feb.1938

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Filament Vf 4 Volts / If 1.2 Ampere / Half indirect / Parallel / series AC/DC
Description To avoid the Philips penthode patent, Thermion calls it a tetrode because the surpressor grid is connected to the grid instead of the kathode/filament. Nevertheless, this is a plug-in replacement for the E443H. Literature: magazine Thermion Nieuws of may-June 1935. 
Information source - - -   
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5_443h_thermion_1.jpg
5-443H: FF
Franck Faure

 
5443hbase.png
5-443H
Peter den Boer

 
5443hdata1.png
5-443H: own collection
Peter den Boer


from Just Qvigstad


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