• Country
• United States of America (USA)

• Manufacturer / Brand
• Electrical Research Laboratories Inc. (Erla); Chicago, Illinois

• Year
• 1922

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 235338

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: R.F. Transformer AB1, AB2, AB3 - Electrical Research

• Notes

• R.F. Transformer AB1, AB2, AB3.

   

   

   

• Price in first year of sale
• 6.00 $

• Literature/Schematics (1)
• Radio Digest Illustrated, 1922 Aug. 05, p. 6

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

• Other Models

• Here you find 133 models, 47 with images and 61 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Electrical Research Laboratories Inc. (Erla); Chicago, Illinois