Ultra High Frequency Converter HFC

National Company; Cambridge & Malden (MA)

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  • Year
  • 1932–1936 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 49562
    • 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
  • 3
  • Main principle
  • RF Converter/Adapter (not voltage converter)
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Powered by external power supply or a main unit. / 6VDC (for filaments) and -8, 67.5, 135 DC Volt
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Ultra High Frequency Converter HFC - National Company; Cambridge &
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 9 x 10 x 7 inch / 229 x 254 x 178 mm
  • Notes

  • The National HFC Ultra High Frequency Converter receives the 28 and 56 MHz bands with two sets of (two) plug-in coils and down-converts either of these bands to the BC band for reception with a BC band receiver. Most suited for use with TRF broadcast band receivers. Has a National H Dial for tuning.

    Requires 67.5V and 135V for B+ supply and -8V for C- supply.  Also requires 6VDC for the filaments.

  • Price in first year of sale
  • 39.00 $
  • External source of data
  • Ernst Erb
  • Mentioned in
  • National Catalog No. 220 - 1933
  • Literature/Schematics (1)
  • Short Wave Craft, October 1932 Pages 350, 351, 381

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