• Country
• United States of America (USA)

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

• Year
• 1932 ?

• Category
• Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter

• Radiomuseum.org ID
• 63810

• • 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
• 3

• Valves / Tubes
• 24 27 80

• Main principle
• Superheterodyne (common); ZF/IF 1000 kHz

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Short Wave (SW only)

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

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: SW Conv. 112-A Ch= 300 - Apex Electric, Pool; Chicago;

• Notes
• The SW Converter "112-A" is used in model "712"; chassis "300-X" is designed for 25 cycle operation.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 4 = ca. 1934 and before

• 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)