• Year
  • 1947–1949
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 87460
    • alternative name: National Toy Co.
    • Brand: Thrillbox

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 11
  • Main principle
  • Superhet with RF-stage; ZF/IF 456 kHz
  • Wave bands
  • Broadcast, Long Wave and more than two Short Wave bands.
  • Power type and voltage
  • Alternating Current supply (AC) / 115 / 230 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Power out
  • 1.5 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: HRO-7-R - National Company; Cambridge &
  • Shape
  • Rack
  • Notes
  • coverage 0,05 - 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, bandspread in HAM bands), AM/CW/SSB (BFO);
    rack version of HRO-7, integrated noise limiter, grey micrometer dial and coil sets with linear marks;
    external power supply SPU-697 (voltages: filaments 6,3V B+ 240V), optional rack speaker RFSH.
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

 Collections | Museums | Literature

Museums

The model can be seen in the following museums.

 Forum