• Country
• United States of America (USA)

• Manufacturer / Brand
• Columbia Radio Corp.; Chicago, Illinois

• Year
• 1922 ?

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

• Radiomuseum.org ID
• 216409

• 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: Gem-O-The Air Model A - Columbia Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 9.75 x 6.5 x 6.75 inch / 248 x 165 x 171 mm

• Notes
• Columbia Radio Corporation Gem-O-The Air Boxed crystal receiver with the Columbia Three Way Detector.

• Mentioned in
• Crystal Clear (Volume 1) (Page 168)

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

• Other Models

• Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Columbia Radio Corp.; Chicago, Illinois