• Country
• United States of America (USA)

• Manufacturer / Brand
• Apex Electric, Pool; Chicago; US Radio & Television Corp.; Marion; (US Radio&Refrigeration)

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 63880

• • alternative name: Apex Electric Mfg. || Case Electric || Melrose || United States Radio & T

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

• Number of Tubes
• 9

• Valves / Tubes
• 26 26 26 26 27 26 71A 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) / 100 - 130 Volt

• Material
• Wooden case

• from Radiomuseum.org
• Model: Apex 80 Case 81 incl. 81B and 81C - Apex Electric, Pool; Chicago;

• Shape
• Console with any shape - in general

• Notes

• One dial (primary tuning control knob) ; push-pull AF output stage.
  The model Apex 80 Case 80 has a power supply which is connected through wires, but Apex 81 with the same tube line up has an integrated power supply on the chassis. There are at least the two slightly different versions Case 81B and Case 81C.

• Price in first year of sale
• 119.00 $

• 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

• Other Models

• Here you find 218 models, 88 with images and 122 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Apex Electric, Pool; Chicago; US Radio & Television Corp.; Marion; (US Radio&Refrigeration)