• Country
• United States of America (USA)

• Manufacturer / Brand
• Wireless Specialty Apparatus Co.; Boston (MA)

• Year
• 1918

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

• Radiomuseum.org ID
• 101231

• Main principle
• Special principle (see notes)

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

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Crystal Detector Receiver IP500 - Wireless Specialty Apparatus

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 23 x 14 x 12 inch / 584 x 356 x 305 mm

• Notes
• Receiver/reactive Tuner for external Detector, either Crystal or tube (Triode). Buzzer for crystal adjustment (Battery Power required). Tuning range 150 to 6800 metres. Detector external (choice of crystal or vacuum tube). Similar to SE 143 (maybe different tuning range).

• Price in first year of sale
• 425.00 $

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• Vintage Radio 1887-1929, Greenwood's Classic Pictorial Album

• Author
• Model page created by John Koster. See "Data change" for further contributors.

• Other Models

• Here you find 68 models, 66 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Wireless Specialty Apparatus Co.; Boston (MA)