R-106 / HRO

National Company; Cambridge & Malden (MA)

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  • Year
  • 1944/1945 ?
  • Category
  • Military Receiver
  • Radiomuseum.org ID
  • 286317
    • alternative name: National Toy Co.
    • Brand: Thrillbox

 Technical Specifications

  • 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. / 115VAC, 230VAC, 6VDC or 12DC Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 1.5 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: R-106 / HRO - National Company; Cambridge &
  • Shape
  • Boatanchor (heavy military or commercial set >20 kg).
  • Dimensions (WHD)
  • 17.3 x 8.7 x 11.8 inch / 439 x 221 x 300 mm
  • Notes

  • The National R-106/HRO is a military communications receiver manufactured for the U.S. Army Signal Corps.  It is the same as the National HRO (Var.4) receiver with military nomenclature tags. It utilizes an external speaker, and external power supplies for operation from 230VAC, 115VAC, 6VDC or 12VDC, It was also available as a rack mount unit.

    The R-106 was issued with nine plug-in coils, covering 100-430 KHz and 0.480-30.0 MHz. These coils were: JA-JD and E-J.. Note that JA-JD coils are HRO-JR coils and do not have the bandspread feature. See HRO Coils Consumer Models for more information.

    In Communications Receivers (4th edition), the R-106 is listed as also being manufactured for the British Army. This is confirmed by the Operating Instruction Manual for the receiver issued by British Army Staff January 1944.

  • Net weight (2.2 lb = 1 kg)
  • 32 lb (32 lb 0 oz) / 14.528 kg
  • Author
  • Model page created by Wayne Childress. See "Data change" for further contributors.

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Museums

The model can be seen in the following museums.

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