• Country
• United States of America (USA)

• Manufacturer / Brand
• Columbia Radio Co.; Youngstown Ohio

• Year
• 1921

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 274113

• • Brand: Sentinel

• Main principle
• Tuner pre 1926 (not a wave trap)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Columbia Tuner - Columbia Radio Co.; Youngstown

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

• Notes

• Columbia Three Circuit tuner. 

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

• Other Models

• Here you find 9 models, 4 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Columbia Radio Co.; Youngstown Ohio