- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1946
- Category
- Commercial Receiver (may include amateur bands)
- Radiomuseum.org ID
- 49568
-
- alternative name: National Toy Co.
- Brand: Thrillbox
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 11
- 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-5-1 - National Company; Cambridge &
- Shape
- Boatanchor (heavy military or commercial set >20 kg).
- Notes
-
Model HRO-5 with integrated noise limiter referenced in Rider's as HRO-5-1;
most often found as model HRO-5A1 model.Apparently never shipped as pure HRO-5-1 version.
Coverage: 50 kHz - 30 MHz (9 ganged coil sets 50-100 / 100-200 / 180-430 / 480-960 / 900-2050 kHz / 1,7-4 / 3,5-7,3 / 7-14,4 / 14-30 MHz, no bandspread in these coils available).
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 dial scale, which delivers great frequency resolution. The dial is not calibrated to directly indicate a frequency but a frequency calibration chart is necessary to determine the correct operation frequency.
External "dog house" type power supply : PSU 697 (filaments 6.3 V AC, B+ 240 V DC) used as standard.
- Net weight (2.2 lb = 1 kg)
- 14.5 kg / 31 lb 15 oz (31.938 lb)
- Price in first year of sale
- 274.00 $
- External source of data
- Ernst Erb
- Source of data
- Communications Receivers
- Circuit diagram reference
- Rider's Perpetual, Volume 17 = 1948 and before
- Mentioned in
- Shortwave Receivers - Past & Present (3rd ed.)
- 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.