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T4400

Information - Help 
ID = 13070
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Diode-Tetrode 
  Ca. 1925 up to 1945 rare.
Identical to T4400
Similar Tubes
Normally replaceable-slightly different:
  DS4100 ; E444 ; RENS1254

Base Europe 7-Pin (C7A, C, 1933) (Codex=Le)
Filament Vf 4 Volts / If 1.2 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933
 
t4400.jpeg
T4400: Photo of tube from my collection - TS
Tomasz Szczesniak

 
actubessmall_9.png
T4400: own collection
Peter den Boer



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