- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1964–1973
- Category
- Amateur-Receiver (amateur bands, may include broadcast bands)
- Radiomuseum.org ID
- 87632
-
- alternative name: National Toy Co.
- Brand: Thrillbox
National Company sales brochure.
- Number of Transistors
- 37
- Semiconductors
- Main principle
- Superhet, double/triple conversion; ZF/IF 2750/230 kHz
- Wave bands
- Broadcast, Long Wave and more than two Short Wave bands.
- Power type and voltage
- Storage Battery for all (e.g. for car radios and amateur radios)
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
- Material
- Metal case
- from Radiomuseum.org
- Model: HRO-500P - National Company; Cambridge &
- Shape
- Portable set > 8 inch (also usable without mains)
- Notes
- coverage 5 - 30000 kHz, triple conversion up to 4 MHz, double conversion above 4 MHz;
linear analog readout, Wadley-loop, preselector, passband tuning, notch filter;
portable version with built-in speaker, BP-8 NiCad-battery and WPC-5 carry case.
- Source of data
- Shortwave Receivers - Past & Present (3rd ed.)
- Author
- Model page created by Martin Bösch. See "Data change" for further contributors.
- Other Models
-
Here you find 445 models, 284 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)