HRO Var. 2 (according to Moore)
National Company; Cambridge & Malden (MA)
- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1935/1936 ?
- Category
- Commercial Receiver (may include amateur bands)
- Radiomuseum.org ID
- 86413
-
- alternative name: National Toy Co.
- Brand: Thrillbox
Collection privée (réf.: 1826)
to see in Bletchley Park.
- 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
- Alternating Current supply (AC) / AC 6.3 & DC 180 Volt
- Loudspeaker
- - This model requires external speaker(s).
- Power out
- 1.5 W (unknown quality)
- Material
- Metal case
- from Radiomuseum.org
- Model: HRO [Var. 2 ] - National Company; Cambridge &
- Shape
- Boatanchor (heavy military or commercial set >20 kg).
- Dimensions (WHD)
- 440 x 220 x 300 mm / 17.3 x 8.7 x 11.8 inch
- Notes
-
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 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.
Knobs with metal skirts, push-pull type S-meter switch, pilot light left of selectivity switch, dark calibration charts with white lettering.
External power supply : PSU 697, 5897 or 5886 ("dog house" type).
- Net weight (2.2 lb = 1 kg)
- 14.5 kg / 31 lb 15 oz (31.938 lb)
- Price in first year of sale
- 233.00 USD
- Source of data
- Communications Receivers
- Literature/Schematics (3)
- Le Guide du Collectionneur TSF Biraud/Foster, Vol. I (page 238)
- 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.
Museums
The model can be seen in the following museums.