• Country
• United States of America (USA)

• Manufacturer / Brand
• Radio World (periodical)

• Year
• 1925

• Category
• Kit (Parts plus instruction) or building instructions only

• Radiomuseum.org ID
• 186473

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 4

• Valves / Tubes
• UX201A UX201A UX201A UX201A or UX112

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / 6 & 45 & 76.5 & 90 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: 1925 Diamond of the Air - Radio World periodical

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

• Dimensions (WHD)
• 19.5 x 9 x 8.25 inch / 495 x 229 x 210 mm

• Notes
• The radio was designed by Herman Bernard of Radio World Magazine. First shown in the Radio World April 4th, 1925 magazine it is named The Diamond of the Air. In the next 4 weeks of Radio World Magazine each issue showed the construction of the set and finally included trouble shooting. It was also shown again in the July 25th, 1925 Issue titled How to Build the Diamond Described for the Novice. It could be built from scratch from parts available in stores at the time. The Sept 5th 1925 issue of Radio World also shows how to update the set to use the new UX120 tube in the final audio stage if UX199 tubes were used. A Kit form of this set is advertized in the July 25, 1925 Issue of Radio World for a price of $41.50.

• Net weight (2.2 lb = 1 kg)
• 15 lb (15 lb 0 oz) / 6.810 kg

• Price in first year of sale
• 42.00 $

• Source of data
• - - Data from my own collection

• Mentioned in
• Radio World (April 4, 11, 18, 25 and July 25th 1925)

• Literature/Schematics (1)
• - - Manufacturers Literature

• Author
• Model page created by Tom Guest. See "Data change" for further contributors.

• Other Models

• Here you find 2 models, 2 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radio World (periodical)