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BG4

Country:  Great Britain (UK)      Brand:  Gecovalve (Geco) = Brand of General Electric (GB) 
  Tube type:  Dual-Grid Tetrode   Frequency converter 
Tube ID = 12577
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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)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If: 0.08 Ampere / -: Direct / -: Battery = /
Description Mit Bigrille-Sockel hauptsächlich in Französischen Radios der 20er Jahre zu finden. 
Text in other languages (may differ)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  tubeenvdiag_klein_mod_bigr_2.gif
  DRB 55
Wolfgang Holtmann
bg4.jpg
CA
Christian ADAM

 
tubesockel_klein_bigrillem_4.gif
W.Holtmann
Wolfgang Holtmann

 
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BG4    

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