• Country
• United States of America (USA)

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

• Year
• 1947–1951

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

• Radiomuseum.org ID
• 88511

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

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

• Number of Tubes
• 13

• Valves / Tubes
• 6SG7 6SA7 6J5 6SG7 6SG7 6H6 6H6 6SJ7 6AC7 6SJ7 6V6 5Y3 0D3

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 115 / 230 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 3.5 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: NC-173R - National Company; Cambridge &

• Shape
• Rack

• Dimensions (WHD)
• 19 x 10.5 x 14.8 inch / 483 x 267 x 376 mm

• Notes
• coverage 540 kHz - 31 and 48-56 MHz, AM, CW (BFO);
  rack version of NC-173 receiver, similar to NC-183 but with only one RF-stage and single audio output tube;
  optional NC-173RS rack speaker, optional NFM-73 NBFM-adaptor.

• Net weight (2.2 lb = 1 kg)
• 20.7 kg / 45 lb 9.5 oz (45.595 lb)

• Price in first year of sale
• 190.00 $

• Source of data
• Communications Receivers

• Mentioned in
• Shortwave Receivers - Past & Present (3rd ed.)

• Literature/Schematics (1)
• Radio Retailing (Radio & Television R.) (May 1947 page 48.)

• Literature/Schematics (4)
• Photofact Folder, Howard W. SAMS (Set 40, Date 5/48, Folder 4810-13)

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

• Other Models

• Here you find 445 models, 284 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)