Amateur Radio
682 sites
http://hanssummers.com/
Hans Summers (G0UPL) shares his deep passion for radio, electronics, and computing through dozens of detailed project pages covering QRSS beacons, WSPR kits, homebrew transmitters, Nixie clocks, frequency counters, and more. The site is a treasure trove for QRP enthusiasts and homebrewers, showcasing everything from crystal radios to synthesizer design and the popular QRP Labs kit lineup.
https://hfsignals.com/
HF Signals is the official home of the BITX line of amateur radio transceivers, offering a range of affordable QRP kits from the $39 all-analog LARCSet to the feature-packed $399 sBitx v3 SDR. Each radio is hand-assembled and tested, with open-source schematics and software, making them popular among homebrewers, beginners, and QRP enthusiasts worldwide.
https://www.radioing.com/
Radioing.com, created by Charlie Bautsch (W5AM), is a sprawling amateur radio network covering everything from licensing guides and RF calculators to virtual museums of classic Collins Radio equipment and vintage transceivers. With over 4,000 ham radio links, callsign search tools, Morse code resources, classified ads, and a remote station, this site is a comprehensive hub for both newcomers and seasoned hams.
https://www.qsl.net/ac6xi
AC6XI's personal amateur radio homepage, featuring a link to a how-to page and contact information for this licensed ham operator. The site is sparse but serves as a basic online presence for the callsign AC6XI, with promises of future updates.
https://www.qsl.net/dl4tt/DawgX-rayClub.html
The Dawg X-ray Club is a satirical guide for amateur radio operators, humorously skewering the ego-driven behaviors of DXers who chase fame and prestige in the ham radio community. Created by Fritz Sommer (DL4TT), the site features chapters translated into multiple languages and links to classic DX operating resources, blending comedy with genuine community commentary.
https://repeater-builder.com/
Repeater Builder is a dedicated resource for amateur radio enthusiasts focused on building, modifying, and maintaining repeater systems. The site dives into the technical side of ham radio infrastructure, making it a go-to reference for hobbyists who want to construct or upgrade their own repeaters.
https://amrad.org/
AMRAD, the Amateur Radio Research and Development Corporation, is a technical ham radio club based in Fairfax, Virginia, focused on cutting-edge projects like weak signal detection, low frequency (LF) experimentation, software-defined radio (SDR), and spread spectrum research. The site serves as a hub for members and enthusiasts alike, featuring project documentation, newsletters, forums, and meeting information for this long-running research-oriented amateur radio organization.
https://wb4aej.com/hamdomain
WB4AEJ's Ham Domain is a comprehensive amateur radio resource built around a massive directory of ham radio operator websites, organized by callsign. Beyond the directory, the site covers special events stations, callsign lookups, fox tone sequences, and links to major organizations like ARRL, AMSAT, and TAPR.
https://aprs.org/
The original home of APRS (Automatic Packet Reporting System), a ham radio digital communications protocol developed by Bob Bruninga (WB4APR) that allows operators to share real-time position, weather, messages, and event data over a single national channel. Now maintained for historical purposes, the site archives over two decades of APRS development including presentations, technical guides, satellite projects, and links to balloon launches and digipeater resources.
https://1x1callsigns.org/
A dedicated resource for amateur radio operators looking to reserve FCC-authorized one-by-one (1x1) special event call signs for conventions, festivals, and other community celebrations. The site includes an FCC regulations guide, a searchable 1x1 callsign database, coordinator listings, and a reservation request system for temporary station operation.