• 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
• 49510

• Number of Tubes
• 4

• Valves / Tubes

• Main principle
• TRF without regeneration

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Somerset Shelbourne 4B - National Airphone Corp.; New

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

• Dimensions (WHD)
• 27 x 15 x 12 inch / 686 x 381 x 305 mm

• Notes
• One dial (primary tuning control knob) ; mahogany cabinet.

• Price in first year of sale
• 85.00 $

• External source of data
• Ernst Erb

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

• Mentioned in
• Radio News,Feb.1925

• 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)