• Country
• United States of America (USA)

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

• Year
• 1925

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 224892

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Harmonik AF Transformer - Karas Electric Co.; Chicago IL

• Notes

• Karas Harmonik Audio Transformer.

• Mentioned in
• Radio Broadcast, Nov. 1925, p. 13

• Author
• Model page created by Hans-Joachim Korn † 16.11.15. See "Data change" for further contributors.

• Other Models

• Here you find 5 models, 5 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Karas Electric Co.; Chicago (IL)