• Country
• United States of America (USA)

• Manufacturer / Brand
• Ferris, J. Herbert ; Royal Oak, Michigan

• Year
• 1917

• Category
• Morse-Equipment & TTY, RTTY, TDD etc.

• Radiomuseum.org ID
• 259050

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Enclosed Rotary Gap - Ferris, J. Herbert ; Royal Oak

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 8 x 0 x 0 inch / 203 x 0 x 0 mm

• Notes

• Enclosed Rotary Gap Up to 1 K. W. capacity. 

• Price in first year of sale
• 8.50 $

• Literature/Schematics (2)
• June 1917, The Electrical Experimenter magazine advertisement on page 146

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

• Other Models

• Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ferris, J. Herbert ; Royal Oak, Michigan