• Country
• United States of America (USA)

• Manufacturer / Brand
• Tel-Radion Co.; New York City

• Year
• 1916

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 200552

• Main principle
• Crystal or Solid State Detector

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Permanent Crystal Detector Duplex - Tel-Radion Co.; New York City

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

• Dimensions (WHD)
• 4.5 x 3.5 x 4.5 inch / 114 x 89 x 114 mm

• Notes
• The Tel-Radion Co. Duplex Tel-Radion employed two different crystal detectors inside an enclosed cabinet. The use could switch between local and long distance reception.

• Price in first year of sale
• 11.00 $

• Literature/Schematics (1)
• August 1916 Electrical Experimenter magazine inside front cover

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

• Other Models

• Here you find 6 models, 6 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tel-Radion Co.; New York City