- 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
- 63820
-
- 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
- 4
- Main principle
- TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935
- Tuned circuits
- 2 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)
- from Radiomuseum.org
- Model: 20 - Apex Electric, Pool; Chicago;
- Notes
- U.S. Electric Corp. also built sets with overlapping model numbers (e.g.model 37 8-tube battery TRF).
The AC tetrode UY224 was first announced in April 1929 - and only later followed the 24A. The model with this tubes can not be before 1929 [EE].
- 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)
- Literature/Schematics (1)
- Rider's Perpetual, Volume 2 = 1932 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)