• Country
• United States of America (USA)

• Manufacturer / Brand
• National Electric Manufacturing Co. (NEM); Chicago

• Year
• 1916

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

• Radiomuseum.org ID
• 203804

• Wave bands
• - without

• Power type and voltage
• AC/DC-set / 110 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: National Hi-Tone Rotary Spark Gap - National Electric

• Shape
• Tablemodel, with any shape - general.

• Notes
• National Electric Manufacturing Company "National" Hi-Tone Rotary Spark Gap has a speed regulator and a shut off switch. The speed could be regulated from 3000-6000 RPM. Can be used on spark coils up to 1 KW.

• Price in first year of sale
• 12.00 $

• Literature/Schematics (1)
• October 1916 Electrical Experimenter advertisement page 453

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 2 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Electric Manufacturing Co. (NEM); Chicago