• Country
• United States of America (USA)

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

• Year
• 1956 ?

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

• Radiomuseum.org ID
• 256977

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

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

• Number of Tubes
• 1

• Valves / Tubes
• 6AK6

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Universal 100KC Crystal Calibrator XCU-27 - National Company; Cambridge &

• Shape
• Chassis only or for «building in»

• Notes

• The National XCU-27 Universal 100KC Crystal Calibrator can be used with any receiver, but was specifically marketed for the National NC-190, NC-140, NC-400, NC-300, NC-303, NC-155, HRO-50, and HRO-60 receivers, and the NCX-3 and NCX-5 transceivers.

• Price in first year of sale
• 26.60 USD

• 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)