• Country
• United States of America (USA)

• Manufacturer / Brand
• Hi-Grade Wireless Instrument Co.; Asheville, North Carolina

• Year
• 1922

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

• Radiomuseum.org ID
• 352772

• Main principle
• Crystal or Solid State Detector

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Hi Grade Crystal Set - Hi-Grade Wireless Instrument

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Notes

• Hi-Grade Wireless Crystal Receiver

• Price in first year of sale
• 8.50 $

• Mentioned in
• -- Original prospect or advert (Sept. 22, 1922 Asheville Citizens newspaper)

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

• Other Models

• Here you find 3 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hi-Grade Wireless Instrument Co.; Asheville, North Carolina