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GG-304

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ID = 73929
       
Country:
United States of America (USA)
Brand: Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Tube type:  Geiger-Müller- counter tube 
Identical to GG-304

Filament
Description

ϒ radiation / cosmic ray counter. Opaque-coated T8 glass bulb, 4-pin pee-wee ceramic base. Non self-quenching, extra-long life. 1947.

 
Information source Tube Lore (II)   

 
gg_304.jpg

 

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