• Country
• United States of America (USA)

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

• Year
• 1931–1933 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 92331

• • 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
• 8

• Valves / Tubes
• 24A 24A 24A 27 27 45 45 80

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: Apex 31 - Apex Electric, Pool; Chicago;

• Shape
• Chassis only or for «building in»

• Notes

• Optional remote control; push-pull af output stage. Some models were exported, for instance to Switzerland like the model Apex 31-CP Radio-Grammo-Combination.

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• Rider's Perpetual, Volume 1 = 1931/1934 (1919 to 1931)

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• 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)