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BG4

Information - Help 
ID = 12577
       
Country:
Great Britain (UK)
Brand: Gecovalve (Geco) = Brand of General Electric (GB)
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to BG4
Similar Tubes
Normally replaceable-slightly different:
  A441N_5pin ; DG407/0 ; DZ1 ; MX40_Fotos ; R43M

Base Europe "B5 big size" (D, Bigrille) (Codex=Eu)
Filament Vf 4 Volts / If 0.08 Ampere / Direct / Battery =
Description Mit Bigrille-Sockel hauptsächlich in Französischen Radios der 20er Jahre zu finden. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
  tubeenvdiag_klein_mod_bigr_2.gif
  BG4: DRB 55
Wolfgang Holtmann
 
bg4.jpg
BG4: CA
Christian ADAM

 
tubesockel_klein_bigrillem_4.gif
BG4: W.Holtmann
Wolfgang Holtmann

 

Usage in Models 1= 1927?? ; 1= 1931? ; 2= 1931 ; 9= 1932

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):13

Collection of a member from D

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