AntenneX
- An online a magazine about antennas and amateur radio.
- http://www.antennex.com/

Altair's Natural Radio Projects
- Exploring the electromagnetic spectrum.
- http://www.altair.org/natradio.html

Octaloop Antenna
- A gif schematic of a 8 sided antenna with mount details.
- http://www.lwca.org/library/articles/ywk/octoloop.htm

Harry's Homebrew
- Antennas, home brew radio circuits, and some theory.
- http://sm0vpo.8m.com/

Electronic Projects and Electronics Tutorials
- An electronics tutorial radio design site. A page that covers nearly every conceivable subject of RF design and construction; with tips, hints and advice.
- http://my.integritynet.com.au/purdic/

How Radio Works
- Informative multipart tutorial with illustrations and animations explains everything about radio waves, many related links.
- http://www.howstuffworks.com/radio.htm

How does a RF receiver work ?
- How do radio receivers manage to communicate over huge distances? An explanation of the fundamental mechanism.
- http://www.4p8.com/eric.brasseur/receiv.html

Receiving Loop Theory - N4YWK
- Sensitivity of multi turn receiving loops.
- http://www.lwca.org/library/articles/ywk/looptheo.htm