• Country
• United States of America (USA)

• Manufacturer / Brand
• Doron Bros. Electric Co.; Hamilton, Ohio

• Year
• 1922

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 246442

• • Brand: Super-Equidyne

• Main principle
• Tuner pre 1926 (not a wave trap)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Variometer - Doron Bros. Electric Co.;

• Literature/Schematics (2)
• December 1922 Electrical Record magazine page 167

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 16 models, 16 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Doron Bros. Electric Co.; Hamilton, Ohio