- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1931 ??
- Category
- Car Radio, perhaps also + sound player/recorder
- Radiomuseum.org ID
- 49555
-
- alternative name: National Toy Co.
- Brand: Thrillbox
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 5
- Main principle
- TRF without regeneration; 2 AF stage(s)
- Tuned circuits
- 3 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Storage and/or dry batteries
- Material
- Metal case
- from Radiomuseum.org
- Model: Auto Box - National Company; Cambridge &
- Shape
- Chassis only or for «building in»
- Notes
- Model referenced in Riders Vol.1, not otherwise verified. The filament circuit is somewhat contradictory. There are two groups in parallel supplied by A. One group consisting of three 24's in series = 7.5 volts, 1.75 amps, while the other group is made of two 12A's = 10 volts, 0.25 amps. How should that work?
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
- Other Models
-
Here you find 446 models, 285 with images and 189 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from National Company; Cambridge & Malden (MA)