• Country
• United States of America (USA)

• Manufacturer / Brand
• Kolster; USA

• Year
• 1928

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 45681

• • Brand: International

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

• Number of Tubes
• 8

• Valves / Tubes
• 26 26 26 26 27 26 71A 80

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

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

• Material
• Wooden case

• from Radiomuseum.org
• Model: K-28 - Kolster; USA

• Shape
• Console, Highboy (legs > 50 %).

• Dimensions (WHD)
• 45 x 25 x 16 inch / 1143 x 635 x 406 mm

• Notes

• One dial (primary tuning control knob)

  K-28 same as the K-23 for 25 cycle. 

  Price, less tubes, $285

  K28- for 25 cycle 110 volt AC operation.

• Price in first year of sale
• 285.00 $

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• 1928 Kolster radio brochure

• Other Models

• Here you find 104 models, 48 with images and 69 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kolster; USA