Thierry Lombry (ON4SKY) has a fascinating site encompassing his amateur astronomy and amateur radio interests at http://www.astrosurf.com/luxorion/. Part of the site is in French but there is plenty in English. [Accessed 31 May 2004].
For almost everything you might need to know about antennas, try http://www.cebik.com. [Accessed 10 May 2004].
Marconi Calling - A fascinating exploration of Guglielmo Marconi's life, his scientific discoveries, the impact of wireless and the development of modern communications. http://www.marconicalling.com. [Accessed May 2004]
RigPix - Source of historical information and images of radios, accessories and more. http://www.rigpix.com/. [Accessed May 2004]