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History of the manufacturer  

Operadio Corp.; St. Charles (IL)

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Name: Operadio Corp.; St. Charles (IL)    (USA)  
alternative name:
Operadio Mfg,
Abbreviation: operadio
Products:
Summary:

In the November 1924, The Radio Trade Directory, and also the August 1926 edition of the McGraw-Hill Radio Trade Directory under the headings manufacturers of Vacuum Tube Sets on page 82, the Operadio Corporation was located at 8 South Dearborn Street in Chicago, Illinois.
Sometime in the 1930's the company moved to Saint Charles, Illinois.

Founded: 1922
Production: 1922 - 1927
History:
Infos taken from the still in business successor company "DuKant" see dukcorp.com/History.asp1922 - Operadio Corporation is founded by J. McWilliams Stone. Product is first portable wireless radio. 1927 - Operadio stops making radios 1934 - Operadio goes into receivership 1951 - Operadio Manufacturing Company becomes Dukane Corporation see "Dukane".


Some models:
Country Year Name 1st Tube Notes
USA  23 195$    
USA  25 1925   Two dials (primary tuning control knobs) This radio was also exported to Australia in 1... 
USA  25 1926 Consolette UV199  self contained portable, includes frame aerial, batteries, and built in horn speaker. H... 
USA  23/24 2 UV199  The original tube line up has to be UV199 if this model has arrived in 1923: The "... 
USA  35 2478A 56  Push-pull af output stage; power transformer for 25 Hz. 
USA  35 2483A 2A3  2 push-pull af output stages; power transformer for 25 Hz. 
USA  36 2677A 57  Push-pull af output stage; power transformer for 25 Hz. 
USA  35 478A 56  Push-pull af output stage. 
USA  35 478AH 56  Push-pull af output stage. 
USA  35 483A 2A3  2 push-pull af output stages. 
USA  34 484 864   
USA  34 484A 864   

[rmxhdet-en]

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

Scanned from the Radio Retailing June 1937.tbn_operadio_promotion_june37.jpg
Scanned from the Radio Retailing August 1937.tbn_operadio_prom_p44_aug37.jpg
Firmen-Logo: The Operadio Corp.; Chicagotbn_us_operadio_29_logo.jpg
Scanned from the Radio Retailing February 1937.tbn_rr_feb37_p57_operadio.jpg
Scanned from the Radio Retailing November 1946 page 134.tbn_rr_nov46_p134.jpg
Scanned from the Radio Retailing February 1947 page 151.tbn_rr_feb47_p151.jpg
May 1925 Radio News magazine advertisement on page 2149tbn_usa_operadio_may_1925_radio_news_page_2149.jpg
Scanned from the Radio Retailing October 1928 page 43.tbn_rr_october28_ad_operadio_p43.jpg
Operadios were imported to Australia in 1925-26. Advertisement from the "Australasian" August 28, 1926tbn_us_operadio_ad_australia_1926.jpg

  

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