• Country
• United States of America (USA)

• Manufacturer / Brand
• National Airphone Corp.; New York (NY)

• Year
• 1923

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

• Radiomuseum.org ID
• 232277

• Main principle
• RF-Circuit or wave trap (separate, can also be an antenna with amp.)

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

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Interference Eliminator - National Airphone Corp.; New

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 6.5 x 4.5 x 1.25 inch / 165 x 114 x 32 mm

• Notes

• National Airphone Interference Eliminator.

• Price in first year of sale
• 7.50 $

• Mentioned in
• Radio News (October 1923 The Radio News magazine advertisement page 369)

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

• Other Models

• Here you find 15 models, 13 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Airphone Corp.; New York (NY)