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SR4207

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ID = 69830
       
Country:
United States of America (USA)
Brand: Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Tube type:  Damper Diode-Beam Power-Endtetrode 
Identical to SR4207

Base Duodecar 12-pin, B12C Glass (USA 1961)
Filament Indirect
Information source Essential Characteristics, GE 1973   


Just Qvigstad

Collection of

 
sr42207_sylvania_1.jpg

 

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