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MX40_Fotos

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ID = 20032
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to MX40_Fotos
Similar Tubes
Normally replaceable-slightly different:
  A441N_5pin ; BG4 ; DG407/0 ; DZ1 ; PM4DG ; R43M ; TA31
Other base:
  A441
Base Europe "B5 big size" (D, Bigrille)
Filament Vf 4 Volts / If 0.12 Ampere / Direct / Battery =
Description Mit Bigrille-Sockel hauptsächlich in Französischen Radios der 20er Jahre zu finden. 
Literature - - Manufacturers Literature   2-9-1933
  tubeenvdiag_klein_mod_bigr_3.gif
  MX40_Fotos: DRB 55
Wolfgang Holtmann
 
rfgavl40mx40.jpg
MX40_Fotos: CA
Christian ADAM
 
tubesockel_klein_bigrillem_5.gif
MX40_Fotos: W.Holtmann
Wolfgang Holtmann
 
miniwattsmall2_6.png
MX40_Fotos: own collection
Peter den Boer
Usage in Models 1= 1926? ; 1= 1927?? ; 1= 1927 ; 1= 1930
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4
Collection of Peter Kovacs (CH)
Collection of Christian ADAM (F)
Collection of Reinhard Riek (D)
Collection of a member from D
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