Amateur Radio
682 sites
http://bitxhacks.blogspot.com/2017/10/raduino-as-nbfm-tx.html
BITX Hacks is a technical blog by Ashhar Farhan focused on modifications and experiments with the BITX40 amateur radio transceiver boards and Raduino controller. This post walks through a clever 30-minute hack to turn the Si5351 clock generator into a narrow-band FM transmitter using a varactor diode and a simple audio amplifier circuit, complete with Arduino sketch code.
https://qsl.net/vqs
The Virginia QRP Society (W4VQS) is a free amateur radio club focused on QRP low-power operation, welcoming members without any membership fees. Maintained by webmaster Jeff (K4JTN), the site offers club information and links for Virginia-area ham radio enthusiasts interested in low-power communications.
https://w7eca.org/
The Great Falls Area Amateur Radio Club (W7ECA) is a ham radio club serving operators in Cascade County and surrounding North Central Montana. The site covers club membership, repeater information, ARES emergency communications, and events like Field Day and the historic Glacier Waterton Hamfest.
https://f4iha.fr/
The blog of Olivier (F4IHA), a French amateur radio enthusiast who documents his homebrew radio projects including low-power QRPP transmitters, VFOs, antenna tuners, and fox-hunting modules built with Arduinos and components costing under 30 euros. Posts cover schematics, PCB design in KiCad, measurements, and hands-on construction with detailed technical write-ups that make it a great resource for DIY radio builders.
https://mainearrl.org/
The official Maine Section page for the American Radio Relay League covers everything local hams need, including district info, repeater listings, emergency communications nets, and an upcoming hamfest convention in Augusta. Resources for mentors (Elmers), club listings, EMCOMM testing, and multiple nets like the Maine Seagull Net and Maine Public Service Net make this a practical hub for amateur radio operators across the state.
https://dcara.net/
The Denton County Amateur Radio Association (DCARA) is the official club site for ham radio operators in Denton County, Texas, operating under club call sign W5NGU. Visitors can find information about club meetings, repeater status, license classes, public service events, Field Day activities, and membership details for the North Texas amateur radio community.
http://websdr.org/
WebSDR.org is the home of the WebSDR project, a network of software-defined radio receivers accessible via a web browser, allowing anyone to tune into shortwave, amateur radio, and other RF signals from around the world. The site connects users to SDR servers hosted by universities, radio clubs, and hobbyists, making radio listening accessible without any special hardware.
http://dfma.org/
The Durham FM Association (DFMA) is an amateur radio club based in Durham, North Carolina, serving members across the Research Triangle Area with repeaters, monthly meetings, and public service activities. The site covers club events, repeater information, newsletters, ARES/AUXCOMM support, and Field Day activities, making it a central hub for local ham radio enthusiasts.
https://k3can.us/
K3CAN's homepage belongs to a licensed amateur radio operator, identified by the FCC-style callsign K3CAN. The site appears to be a classic old-web personal page with ASCII art and a frames-based layout, offering a glimpse into the hobbyist ham radio community of the early internet era.
http://marsradio.net/MARSmain
The Metropolitan Amateur Repeater System is the official site for a Los Angeles-area ham radio repeater network founded in 1993, operating on 447.820 MHz and linked 24/7 to a Missouri repeater via EchoLink. Beyond repeater info, the site offers local earthquake reports, weather, and traffic resources for Southern California ham operators.