Despite the fact that radio predates television by many years, it is still an important and widely used form of communication. DXing.com is sponsored by Universal Radio Research and is a very informative source of radio technology and news. For users interested in learning how radio works, many basics are described, such as frequency, wavelength, and modulation. An introduction to shortwave radio...

HamRad is a resource for Ham Radio enthusiasts. The website organizes the links to various online resources by topic area: Organizations, Events, Manufacturers, Dealers, Personal Ham Sites, Misc. Ham Sites, HamRad Trader, and Buy-Sell-Trade. All of the collections can be searched by keyword (such as organization name, callsign, or location), while the event listing provides a more detailed search...