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History of the manufacturer  

Uddenberg, Ralf A. (RU); Göteborg

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Name: Uddenberg, Ralf A. (RU); Göteborg    (S)  
Abbreviation: uddenberg
Products: Model types

Ralf A. Uddenberg

Ralf Uddenberg = RU


Some models:
Country Year Name 1st Tube Notes
28 RU 2 B406  Regenerative detector. 
27 Triumf    
26 RU 3 A409  Regenerative detector. 
28 RU 3 W   Regenerative detector. 
28 RU 3 Spécial   Regenerative detector. 
28 RU 4   Regenerative detector and tuned RF. 
27 Lilleputt A409