• Country
• United States of America (USA)

• Manufacturer / Brand
• Essex Manufacturing Co.; Newark, New Jersey (Knight)

• Year
• 1922

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 248096

• Main principle
• Crystal or Solid State Detector

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Crystal Detector [Glass Tube] - Essex Manufacturing Co.;

• Shape
• Tablemodel, with any shape - general.

• Price in first year of sale
• 2.25 USD

• Literature/Schematics (2)
• June, 1922 Electrical Merchandising magazine page 192

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

• Other Models

• Here you find 8 models, 5 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Essex Manufacturing Co.; Newark, New Jersey (Knight)