Responder

United Wireless Telegraph Co.; New York City, New York

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  • Year
  • 1907/1908
  • Category
  • Radio module pre 1926 (not a part, not a key)
  • Radiomuseum.org ID
  • 364314

 Technical Specifications

  • Main principle
  • Crystal or Solid State Detector
  • Wave bands
  • - without
  • Power type and voltage
  • Dry Batteries
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Responder - United Wireless Telegraph Co.;
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 5.875 x 7.25 x 7.25 inch / 149 x 184 x 184 mm
  • Notes

  • United Wireless Telegraph Co. Responder was a rebadged American Deforest Spade Detector. The Deforest Spade Detector was also known as the responder, which was also known as an electrolytic detector, was developed by Lee de Forest in the early 1900s under his new company American Deforest.. American Deforest lasted until 1906 when in December, they defaulted on a $500,000 bond issue and the stock became worthless by 1907.

    Abraham White then formed the United Wireless Telegraph Company in 1907. All of the assets of American De Forest were transferred to United Wireless including leftover responders. The first product of the newly formed company was the United Wireless Type "A" Receiver. The UWT Type "A" receiver consisted of the previous American Deforest Company's Deforest Syntonizer and the Deforest Responder. (Spade detector) This was the same set offered to the United States Navy circa 1905.

  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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The model Responder is part of the collections of the following members.

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