Download the Amateur Radio Band Chart showing frequency allocations.
Download my antenna tools spreadsheet, calculate gains and beam widths.
Playground Amateur Radio Club, PARC, Ft Walton Beach Florida
Pacific RV Service Net
Ham Electronic Homebrewer's web site has some excellent articles, including a loop antenna project.
Digital Modes: I have used a variety of digital mode interfaces between various radios and computers and dumb terminals. Some were home-brew, some commercial, some simple (resistor network), some complex (PK-232). Now I use the BuxComm Rascal (older version) which has audio lines to the laptop audio input/output, and a data line to the RS-232 port on the laptop for PTT; and It has a data line to the radio's 6-pin data connector, which is now standard on most radios. The Rascal is a simple level interface resistor network in a neat little box. It's newer version looks like a USB dongle with audio lines to the radio, or data lines if the radio is equipped for it. I use this simple arrangement with my IC-706 and my Yaesu 7800 dual-bander.
BuxComm Radio Products.
Data interface by Southgate Amateur Radio Club.
A web site dedicated to the digital modes.
Packet radio operation information from DX Zone
The famous SignaLink interface is described here.
Another great web site dedicated to digital modes, authored by N2QLQ.
And thinking of digital modes, ever wonder about those QR codes you see so often? The little pixelated squares? Check this out: http://www.createqrcodes.net/index.html. Thanks to Cassandra's esteemed students at Bright Futures Charter School and especially Samantha for the great suggestion to add this link.
Kits. You want electronic kits. Try this list at http://www.w1wc.com/kits/.
A whole boatload of Amateur Radio information. Thanks to AC6V! Highly recommended web site.
A lot of information about Amateur Radio
Good reference source, this article about ground radials and monopoles.
Many digital modes are describe on this page by XE1BEF
Info about Sun Spots and propagation.
World Sunlight Map
Here is a Ham Radio Toolbar for your browser.
NASA issues radio related information.
A Light-hearted Look at the Hobby of Amateur Radio Hogwash For Hamsters.
My collection of papers and formulae for the famous 555 IC timer chip. It's a PDF file about 50 MB.
DSTAR Users Organization last heard list, updates.
Check out these two documents if you are starting with powerpole connectors. PWR crimp manual and PowerPole Connector Assembly.
FCC Universal Licensing System (ULS) Home Page.
Amateur Digital Communications Association. And watch 145.090 for brrrraaps...
DX Engineering good source of antenna info.
Radio Works good source of antenna info.
http://www.somis.org/ good source of parts information and more
Download TWT application notes listing
Lightning strikes: Here is great site, recommended by W7SAC.
WA7BNM Contest Calendar
Ham Test Online
Hurricane Watch Net, operating on 14.325 MHz.
Great Vendor List
Antenna Calculations: http://www.kyes.com/antenna/navy/basics/antennas.htm
J-Pole antenna Design: Hamuniverse.
Antenna Tutorial: http://www.tutorialsweb.com/satcom/link-power-budget/antenna-gain.htm
RF Cafe! Tremendous amount of information on electrical/electronic subjects.
A nice article at PC Mag about Amateur Radio Operations supporting Katrina recovery.