• Country
• United States of America (USA)

• Manufacturer / Brand
• National Company; Cambridge & Malden (MA)

• Year
• 1947–1952 ?

• Category
• Amateur-Receiver (amateur bands, may include broadcast bands)

• Radiomuseum.org ID
• 86400

• • alternative name: National Toy Co.
  • Brand: Thrillbox

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

• Number of Tubes
• 7

• Valves / Tubes
• 6AK5 9002 6SG7 6SK7 6J5 6V6GT 6J5

• Main principle
• Superheterodyne (common); ZF/IF 10700 kHz

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Powered by external power supply or a main unit. / 6 / 180 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: HFS - National Company; Cambridge &

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 16.5 x 8.75 x 8.5 inch / 419 x 222 x 216 mm

• Notes
• National HFS: experimental VHF-receiver covering 27 - 250 MHz (A: 178-250 MHz, B: 120-178 MHz, C: 80-120 MHz, D: 56-80 MHz, E: 41-60 MHz, F: 27-42 MHz with 6 plug-in coil sets); Modes AM, CW, FM;
  powered by optional external power supply 5886AB or 6 volts vibrator pack 686S.

• Net weight (2.2 lb = 1 kg)
• 8.5 kg / 18 lb 11.6 oz (18.722 lb)

• Price in first year of sale
• 125.00 $

• Source of data
• Communications Receivers

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set #62 Folder 14 dated 5-49)

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 434 models, 281 with images and 172 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Company; Cambridge & Malden (MA)