• Country
• United States of America (USA)

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

• Year
• 1924/1925

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 265492

• Number of Tubes
• 1

• Valves / Tubes
• WD12

• Main principle
• Audio-Amplification; 1 AF stage(s)

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: Radiotrola Single-Stage Amplifier - National Airphone Corp.; New

• Shape
• Tablemodel, with any shape - general.

• Notes

• National Airfone Single-Stage audio Amplifier to match the Monodyne GT1 receiver. 

• Mentioned in
• The Radio Dealer (October 1924 The Radio Dealer magazine advertisement page 7)

• 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)