• Country
• United States of America (USA)

• Manufacturer / Brand
• Thordarson Electric Mfg. Co. ; Chicago (IL)

• Year
• 1925

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 173991

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Autoformer - Thordarson Electric Mfg. Co. ;

• Notes
• Advertising: Thordarson AUTOFORMER the All Frequency Amplifier, amplifies clearly the lowest notes of any instrument as perfectly as the highest notes. Autoformer amplification is an adaptation of impedances, resistances and capacities - developed and perfected by Thordarson. Autoformers are $5.00 each.

• Price in first year of sale
• 5.00 $

• Literature/Schematics (1)
• Radio News ((October 1925, p. 505))

• Literature/Schematics (2)
• Radio Broadcast, Apr. 1926, p. 716

• Author
• Model page created by Karlheinz Gützlaff. See "Data change" for further contributors.

• Other Models

• Here you find 65 models, 53 with images and 22 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Thordarson Electric Mfg. Co. ; Chicago (IL)