73 de WD5GNR
- http://www.wd5gnr.com/
- Information about homebrew electronics, PC boards, micrcontrollers, Basic Stamps, and all aspects of ham radio. Projects, and tips.
HAM Projects
- http://rxcontrol.free.fr/
- Technical information for HF, remote-control and digital decoding devices, plus a CPU-based hardware project.
HDR-2005
- http://home.pages.at/chirt/HDR2005.htm
- Homebrew DC receiver for approximate 300 kHz to 30 MHz. It is a direct conversion receiver with I/Q quadrature sampling detector. Includes schematics, photos and downloads.
K5DKZ
- http://www.k5dkz.com
- Offers information about homemade audio amplifiers, RF amplifiers, auxiliary ham radio equipment including antenna designs and constructions.
Psytronix Group
- http://www.psytronix.org/
- Radio modification and homebrewing information, schematics and manuals for commercial radio equipment and mobile phones.
Spiderbeam
- http://www.spiderbeam.net/
- A multiband Yagi for 14.28 MHz. Technical data and a detailed manual in PDF are online. User reports and a kit service are available.