• Country
• United States of America (USA)

• Manufacturer / Brand
• Kantronics; Olathe, KS

• Year
• 1978 ?

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

• Radiomuseum.org ID
• 189800

• Number of Transistors
• 1

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Batteries / addl. power jack / 12 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: The Notcher audio CW filter - Kantronics; Olathe, KS

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 4 x 2.5 x 6 inch / 102 x 64 x 152 mm

• Notes
• The Notcher audio CW filter is designed to increase signal selectivity when used any amateur CW receiver (including Kantronics 8040); bandwidth 150 Hz at -3 dB; center frequency 750 Hz.

• Net weight (2.2 lb = 1 kg)
• 0.1 kg / 0 lb 3.5 oz (0.22 lb)

• Source of data
• -- Original-techn. papers.

• Author
• Model page created by Emilio Focosi. See "Data change" for further contributors.

• Other Models

• Here you find 3 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kantronics; Olathe, KS