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History of the manufacturer  

Walbert Manufacturing Company; Chicago, IL

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Name: Walbert Manufacturing Company; Chicago, IL    (USA)  
Brand:
Isofarad
Abbreviation: walbert
Summary:

Walbert Manufacturing Company; 923 Wrightwood Avenue, Chicago, IL.

History:
Walbert Manufacturing; - Trade name Isofarad


Some models:
Country Year Name 1st Tube Notes
USA  27 Isofarad 26    
USA  27 Isofarad 26PT    
USA  27 Isofarad 47T    
USA  26 Isofarad 5   Three dials (primary tuning control knobs). 
USA  26 Isofarad 6 [200$]   Two dials (primary tuning control knobs) 
USA  26 Isofarad 6 [180$]   4 dials (primary tuning control knobs). 
USA  26 Isofarad 7   Two dials (primary tuning control knobs). 
USA  26 Isofarad [Chassis, 125$]   Three dials (primary tuning control knobs). 
USA  26 Isofarad [Chassis, 165$]   4 dials (primary tuning control knobs). 
USA  26 Isofarad [Kit]   Three dials (primary tuning control knobs) 
USA  25 Isofarad Jr [150$]   Three dials (primary tuning control knobs). 
USA  25 Isofarad Jr [200$]   Three dials (primary tuning control knobs). 

[rmxhdet-en]

Further details for this manufacturer by the members (rmfiorg):

Radio News for October 1925; page 504tbn_usa_walbert_logo.jpg
Radio News for October 1925; page 504tbn_usa_walbert_adresse.jpg
Radio Broadcast, Jan. 1926, p. 417tbn_usa_walbert_penetrola.jpg

  
rmXorg