Amateur Radio
682 sites
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://aarc.tripod.com/
The Alger Amateur Radio Club is a Michigan-based ham radio organization serving Alger County, with ties to the ARRL and a focus on emergency communications. The site is a simple club homepage from 2002, offering a contact point for local ham radio enthusiasts interested in radio emergency services.
https://darc.de/home
DARC (Deutscher Amateur-Radio-Club e.V.) is the official national organization for amateur radio operators in Germany, offering member services, licensing information, contest coordination, and club resources. With sections covering HF, VHF/UHF/SHF, emergency communications, DX, and youth training, it serves as a comprehensive hub for the German ham radio community.
http://johncath.force9.co.uk/radio%20projects.htm
John Cath's radio project pages feature detailed amateur radio construction projects including a 17-page guide to building a 600W 50MHz solid state amplifier and a power splitter for 70cm. The site reproduces designs from RadCom magazine and the Radio Society of Great Britain, making it a useful reference for ham radio builders and experimenters.
http://findu.com/
findU is a massive 58GB database archiving APRS (Automatic Packet Reporting System) data including weather observations, position reports, vehicle tracking, and telemetry from amateur radio operators worldwide. The site powers real-time weather forwarding to NOAA and the National Weather Service, and even tracks amateur radio payloads aboard the International Space Station.
http://nsradio.org/
The North Shore Radio Association (NSRA) serves amateur radio operators in the Peabody and Danvers, Massachusetts area, coordinating weekly club nets on the 145.470MHz repeater and organizing VE licensing exam sessions. The site provides members with information on club meetings, ARES/Skywarn emergency communications, DMR digital radio, and public service activities.
https://rrra.org/
Red River Radio Amateurs (RRRA) is the official website for an amateur radio club serving the Red River region, featuring club news, event calendars, repeater information, and resources for aspiring ham radio operators. The site covers POTA activations, net schedules, license testing, ARES meetings, and an active blog with technical posts from club members.
http://sm0vpo.altervista.org/
Harry Lythall (SM0VPO/G4VVJ) shares an extensive collection of homebrew amateur radio construction projects, covering everything from QRP transmitters and receivers to circuit boards, oscillators, and RF amplifiers. The site is a treasure trove for hands-on ham radio enthusiasts, packed with schematics, datasheets, calculators, and practical guides for building your own radio equipment.
https://qsl.net/tchc
The Twin City Ham Club is an amateur radio club based in West Monroe, Louisiana, serving local ham radio operators under the callsign group TCHC. This redirect page points visitors to the club's new domain and highlights their involvement in the Louisiana QSO Party contest.
http://ibiblio.org/pub/academic/agriculture/agronomy/ham/BOATANCHORS
Hosted on ibiblio, this is an archive of the Boatanchors mailing list digests, covering vintage and antique radio equipment collecting and restoration. The archive spans hundreds of digest issues alongside FAQs, welcome files, and supplementary resources for enthusiasts of classic tube-based radio gear.