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DG4

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ID = 7725
       
Country:
Hungary
Brand: Sator (brand of Tungsram for tubes)
Tube type:  Dual-Grid Tetrode   Frequency converter 
  Ca. 1925 up to 1945 rare.
Identical to DG4 = DG407/0
Similar Tubes
Normally replaceable-slightly different:
  A441 ; D410 ; RE074d

Base Europe "B5 big size" (D, Bigrille) (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Description

The same tube is also branded Orion.

 
 
dg4_orion_ph1.jpg
DG4: Patrice ZEISSLOFF
Patrice Zeissloff

More ...
 
bigrille_5p~~1.gif
DG4: W.H.
Wolfgang Holtmann

 
dg4data_1.png
DG4: own collection
Peter den Boer

More ...


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