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A4GDR Info
Country:  Spain      Brand:  Castilla; Madrid 
  Tube type:  OCTODE   Controlling (mu) 
Tube ID = 9299
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Identical to A4GDR
Similar Tubes AK1 (can normally be replaced - small diff'ce)  

Base Europe 7-Pin (C7A, C, 1933) (Codex=Leo)
Filament If: 0.6 Ampere / Vf 4 Volts /
Literature Taschenbuch zum Röhren-Codex 1948/49   

a4gdr.jpg
Radio Castilla mod. 36A
Jose Luis Campayo-Soriano

 
18_3.png
Telefunken Werkstattbuch
Wolfgang Bauer

 
Usage in Models   1= 1934 ;
Number of Models with this tube   1
No further Information for

A4GDR    

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