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History of the manufacturer  

Gulbransen Co.; Chicago

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Name: Gulbransen Co.; Chicago    (USA)  
Abbreviation: gulbransen
Products: Model types Brand

Gulbransen Company; 816 North Kedzie Avenue, Chicago, Illinois - Trade names Champion Jr., Gulbransen. According to "The Music Trade Review", September 15, 1928, Gulbransen Company was at 3232 W. Chicago Ave., Chicago. They claimed then to have 1500 radio dealers in an advertisement and state: "In the piano business, Gulbransen has attained leadership that all recognize." Then they sold radios also with franchising outlets - only AC table and console models.
One has to distinguish between Gulbransen in Australia and in the USA.
Gulbransen exportet - for instance to Switzerland.

Tubes with the Gulbransen name made for the company. Manufacturer not known.

The Gulbransen Company began operation in 1904 producing pianos and reed organs. In 1930 Gulbransen aquired the radio manufacturer Wells-Gardner but kept the name as a division of Gulbransen. In July 1957, Gulbransen introduced its first electronic organ - designed by Richard H. Peterson. This was the Model B (Model 1100), a spinet that was the first transistor organ in the industry. Then they produced in 2050 North Ruby Street, Melrose Park, Illinois. Gulbransen eventually merged with Seeburg, and then the entire operation was absorbed by C.B.S. Gulbransen is now a division of Mission Bay Investments producing Elka organs with the Gulbransen name.

Some models:
Country Year Name 1st Tube Notes
USA  30/31 173 Minuet 24  Same chassis as Gulbransen Model 73 Champion Junior & Wells-Gardner Model 72 
USA  30/31 73 Champion Junior 24  Same chassis as Wells-Gardner model 72. 
USA  60 Amplifier APS-10 12AU7  Power amplifier, mono. 
USA  32 Air Cell    
USA  33 3225   4 legged lowboy with stretcher base. 
USA  32 352 57  Different power transformers are used for 110 V (25 cycle), 110 V (60 cycle) or 220 V (40-... 
USA  33 M-5-A1   Wood with marquerty Inlay. 
USA  33 Z6Z1 78  Vibrator for +B. 
USA  33 V6Z2 78  Vibrator for +B. 
USA  29 9950 old or new type 26  One dial (primary tuning control knob) ; new type with dual volume control; push-pull af o... 
USA  31 93 32   
USA  32 926 32   


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

I had found this advertisement long ago and can't remember from where, sorry.tbn_gulbransen_ad_1931.jpg