• Country
• United States of America (USA)

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

• Year
• 1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 49517

• Number of Tubes
• 1

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Power type and voltage
• Dry Batteries

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

• Notes
• One dial (primary tuning control knob)

• External source of data
• Ernst Erb

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

• Mentioned in
• Guide to Old Radios

• 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)