Peripherals and Add-Ons Equipment Shortwave and DX Listening Radio

This category is for information about equipment that is considered a retrofit or other add-on to basic equipment (mainly receivers). Such items may include pre-amplifiers, IF filters, external speaker systems, DSP and other noise reduction systems.

• WD8DAS Sync Page - Offers information about synchronous detection and retrofit synchronous shortwave and dx shortwave and dx listening listening detectors in kit and finished form.
• Harry's Homebrew Homepage - Includes collection of useful receiver, antenna and peripheral homebrew projects, equipment for ham radio and other DX hobbyists.
• Crystal Radio Supply - Crystal Radio Kits, parts and supplies including litz wire, ferrite shortwave and dx listening core and variable capacitors, plus other peripherals and components.
• Quantics W9GR Digital Signal Processors - Information about the DSP-3 which removes noise and other unwanted interference from voice and data communications signals.
• JPS Communications, Inc. - JPS Communications is a manufacturer of DSP equipment for military, equipment shortwave and ham radio applications.

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