Multi-Mode Filter FL-3

Datong Electronics, Ltd.; Leeds

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  • Year
  • 1985 ?
  • Category
  • Amateur Equipment (Other, but not Key)
  • Radiomuseum.org ID
  • 171814

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

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Wave bands
  • - without
  • Power type and voltage
  • Powered by external power supply or a main unit. / 10-15 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Multi-Mode Filter FL-3 - Datong Electronics, Ltd.;
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 7.2 x 2.7 x 6 inch / 183 x 69 x 152 mm
  • Notes
  • The Datong FL-3 is designed specifically to improve reception of SSB, CW, RTTY and AM signals in interference conditions. It features twelve poles of tunable active filtering, independent low and high-pass filters, and a built-in independent notch filter. It can remove "monkey chatter" or "splatter" to SSB signals, remove heterodyne interference to AM and SSB signals, optimize bandwidth for RTTY, FAX and SSTV reception. Simple push-button selection of the four main operating modes: SSB, SSB+NOTCH, SSB+PEAK and CW. Connects to any receiver's headphone or speaker output. Requires 10-15 VDC. 7.2" x 6" x 1.7"

    The Datong FL-3 contains the same filters as the Model FL-2 plus an automatic notch filter. The auto-notch function is intended for removing unwanted tones or whistles from speech signals. The auto-notch will track, then lock onto the signal. Then the LED will light, and the offending tone will disappear! Requires 10-15 VDC. 7.2" x 6" x 1.7". Both the FL-2 and FL-3 are made in England.
  • Source of data
  • - - Data from my own collection

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The model Multi-Mode Filter is part of the collections of the following members.

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