• Country
• United States of America (USA)

• Manufacturer / Brand
• Radio Products Manufacturing Co. (RPM); Chicago, IL

• Year
• 1923

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 52633

• Main principle
• Crystal or Solid State Detector

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: RPM Detector - Radio Products Manufacturing

• Notes

• Listed as RPM in "Vintage Radio".

• Price in first year of sale
• 6.00 $

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• Vintage Radio 1887-1929, Greenwood's Classic Pictorial Album (2nd Edition, p.260)

• Author
• Model page created by Peter Rutishauser. See "Data change" for further contributors.

• Other Models

• Here you find 23 models, 10 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radio Products Manufacturing Co. (RPM); Chicago, IL