• Country
• United States of America (USA)

• Manufacturer / Brand
• National Products Sales Co.; Boston, Mass.

• Year
• 1925 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 201290

• Number of Tubes
• 5

• Valves / Tubes
• UV201A UV201A UV201A UV201A UV201A

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); 2 AF stage(s)

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Amplidyne "5" - National Products Sales Co.;

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

• Dimensions (WHD)
• 27.5 x 9.25 x 9.5 inch / 699 x 235 x 241 mm

• Notes
• National Products Sales Company Amplidyne "5"

• 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 National Products Sales Co.; Boston, Mass.