• Country
• United States of America (USA)

• Manufacturer / Brand
• Ajax Electric Specialty Co.; Saint Louis, Missouri

• Year
• 1925

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 31744

• • Brand: Marveltone

• Main principle
• Crystal or Solid State Detector

• 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: Ajax Junior Crystal - Ajax Electric Specialty Co.;

• Shape
• Tablemodel, with any shape - general.

• Notes

• Loose coupler crystal set with slide tuning. 

• Net weight (2.2 lb = 1 kg)
• 1 lb (1 lb 0 oz) / 0.454 kg

• Price in first year of sale
• 3.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• November 1925, Electrical Record Supplement page 29

• Other Models

• Here you find 6 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ajax Electric Specialty Co.; Saint Louis, Missouri