• Year
  • 1923
  • Category
  • Detector-Radio (Crystal or diode, without tubes/transistors)
  • Radiomuseum.org ID
  • 256964

 Technical Specifications

  • Tuned circuits
  • 1 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Blairco Four Crystal Set - Mitchell Blair Company Blairco
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 5.5 x 9 x 3 inch / 140 x 229 x 76 mm
  • Notes
  • The Blairco "Four" was manufactured for the Mitchell Blair Company by the Martian Manufacturing Company. This crystal set is almost identical to the crystal set that was also built by the Martian Manufacturing Co. called the Big Four. Ad April 1923, Radio magazine advertisement on page 2.

    The Martian Big Four was sold with one or two tuning sliders (ball on coiled spring); Lit.: M.L.Sievers: "Crystal Clear" vol.1, p.72. The Crystal Receiver was sold by different brands like Martian Manufacturing Co. Inc. in Newark, White Manufacturing Co. in Newark, Mitchell Blair Company (Blairco) in Chicago and probably by some more.

  • Price in first year of sale
  • 7.50 USD
  • Literature/Schematics (1)
  • April 1923, Radio magazine advertisement on page 2
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

 Collections | Museums | Literature


The model Blairco Four Crystal Set is part of the collections of the following members.