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S440N

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ID = 14795
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Triode, vacuum   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to S440N
Similar Tubes
Normally replaceable-slightly different:
  AR4100 ; DW3559 ; DW4023 ; E438 ; E438 ; I4078 ; REN1004 ; RS4230 ; TE38
First Source (s)
1929 : Saga of the Vacuum Tube, Tyne p.406
Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   Bulletin CHCR no.26, April 2000, p.17
- - Manufacturers Literature   2-9-1933
s440n_so.png S440N: rtt
Anonymous 10 Collector

Just Qvigstad 		actubessmall_11.png
S440N: own collection
Peter den Boer
Usage in Models 1= 1930?? ; 1= 1931? ; 1= 1931 ; 1= 1932
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of

Rudolf Osterkamp (D)
Jean-Luc Collombon (F)
Tomasz Szczesniak (PL)
 
grammontfotos_s440n_bild1.jpg

S440N
 
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