• Country
• United States of America (USA)

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

• Year
• 1938–1941

• Category
• Amateur Equipment (Other, but not Key)

• Radiomuseum.org ID
• 285912

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

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

• Number of Tubes
• 8

• Valves / Tubes
• 6C6 6D6 6F6G 6L6G 6L6G 6C5 6X5 83 VR150

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 105-125 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

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

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Notes

• The National NSM modulator was specifically designed to be paired with the National NTX-30 transmitter.  Frequency response is flat from 50 to 10,000 cycles.

• Price in first year of sale
• 130.00 USD

• Mentioned in
• National Company 1941 Catalog page 15

• Author
• Model page created by Wayne Childress. See "Data change" for further contributors.

• Other Models

• Here you find 446 models, 285 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)