http://www.arrl.org/ - This is the home page of the American Radio Relay League, which is the main body representing ham radio operators and their interests. This is a good place to start for the person who is interested in getting a ham radio license.
http://www.winlink.org/ - This site does an excellent job of explaining the global network of gateway stations that provide for the transfer of messages between the Internet and the remote mobile amateur radio operator.
http://www.airmail2000.com/ - This site is the source for the freeware program, “Airmail,” which is so very useful for e-mail. The Pactor Primer, which can be found in this site, is a particularly useful source of information. This site also has a pretty decent freeware weatherfax program (no HAM radio license necessary).
http://www.farallon.us/ - This is the commercial site for Farallon Electronics of Sausalito, California. They handle the German-made SCS modems which most amateurs consider to be state-of-the-art for PACTOR. This site has several useful links.
http://www.scs-ptc.com/ - Home of SCS, the creators of PACTOR and manufacturers of state-of-the-art modems.
http://www.jvcomm.de/index_e.html - A site for an excellent weatherfax program (ham license not necessary). You can trial the program for free for an indefinite period of time. If you like it, you can then send the author the $95 or so that he asks for. The SCS modem or a similar one is necessary if one is going to use this program.
http://www.hffax.de/html/hauptteil_hffax_schedules.htm - The best site from which to obtain weatherfax schedules from around the world.
Updated April 23, 2011