- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1938 ??
- Category
- Commercial Receiver (may include amateur bands)
- Radiomuseum.org ID
- 86433
-
- alternative name: National Toy Co.
- Brand: Thrillbox
- Number of Tubes
- 9
- Main principle
- Superhet with RF-stage; ZF/IF 456 kHz; 2 AF stage(s)
- Tuned circuits
- 11 AM circuit(s)
- Wave bands
- Broadcast, Long Wave and more than two Short Wave bands.
- Power type and voltage
- Powered by external power supply or a main unit. / AC 6.3 & DC 240 Volt
- Loudspeaker
- - This model requires external speaker(s).
- Power out
- 1.5 W (unknown quality)
- Material
- Metal case
- from Radiomuseum.org
- Model: HRO-C - National Company; Cambridge &
- Shape
- Rack
- Dimensions (WHD)
- 483 x 260 x 350 mm / 19 x 10.2 x 13.8 inch
- Notes
-
HRO receiver in a MRR table rack, in combination with SPC coil storage unit (five compartments), power supply and speaker.
Coverage : 1.7 – 30 MHz ( 4 standard ganged coil sets for 1.7 – 4, 3.5 – 7.3, 7 – 14.4, 14 – 30 MHz included, 2 coil sets for broadcast immediately available at extra cost, 7 more coil sets sold later including long waves ( total spectrum covered from 50 kHz to 54 MHz ).
Modes AM / CW/SSB (BFO).
The 0 – 500 epicyclic readout dial allows for continuous analog tuning while digitally indicating incremental progress over a range of ten full turns of the large tuning knob that tunes with velvet smoothness. Ten times the circumference of the dial is nearly 4 meters on a normal plain dial scale, which delivers great frequency resolution.
External power supply : PSU 697, 5886 or 5897 to operate sets equipped with battery tubes (2,5 V filaments).
- Net weight (2.2 lb = 1 kg)
- 25 kg / 55 lb 1.1 oz (55.066 lb)
- Price in first year of sale
- 320.00 $
- Source of data
- Communications Receivers
- Author
- Model page created by Martin Bösch. See "Data change" for further contributors.
- 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)
Collections
The model is part of the collections of the following members.