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GR4

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ID = 7054
       
Country:
Great Britain (UK)
Brand: Ferranti, GB
Tube type:  Full-Wave Rectifier gas filled 
Identical to GR4

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 3 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   

gr4.png
GR4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †

gr4_sock.png GR4: Tabu Röhren-Codex, 1948
Anonymous 15 Collector


Just Qvigstad
 

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