Amateur Radio
682 sites
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.
http://hfpower.com/
ACOM is a manufacturer of HF linear amplifiers and related amateur radio equipment, including the flagship ACOM 2000A automatic amplifier and the ACOM 1000A. The site serves as a product hub for serious ham radio operators seeking high-power amplification solutions built around tubes like the Svetlana 4CX800A.
https://3830scores.com/
Created by Bruce Horn (WA7BNM), this site tracks and aggregates self-reported scores from hundreds of amateur radio contests, including ARRL DX, CQ WPX, and dozens of weekly sprint events. Operators can compare claimed scores across multiple years and calls, making it an invaluable reference for the competitive ham radio contesting community.
https://life.itu.int/radioclub
The official site of 4U1ITU, the International Amateur Radio Club operating under the callsign of the International Telecommunication Union in Geneva, covering club history, QSL info, and notable operations. Highlights include Earth-Moon-Earth (EME) contacts, a historic material collection spanning 60 years of club activity, and expeditions like the ITU team's operation from Mont Blanc.
https://www.qsl.net/ema-arrl/clublist.html
A comprehensive directory of amateur radio clubs across Eastern Massachusetts, organized under the ARRL Eastern Massachusetts section. Visitors will find dozens of clubs listed by name with links, spanning general, repeater, packet, contest, school, and company club categories.
http://wb6noa.com/
WB6NOA appears to be the personal amateur radio site of a licensed ham operator, identifiable by the callsign-based domain name. The site uses a frames-based layout typical of early web design, suggesting a hobbyist page dedicated to ham radio activities and interests.
https://www.qsl.net/mid-islandarc
The Mid-Island Amateur Radio Club (MIARC) serves ham radio enthusiasts on Long Island, New York, with club info covering repeaters, membership applications, and Field Day photos. A community hub for local hams, the site also features a bulletin board, swap shop, and links to related resources including VE exam info and ARRL connections.
https://radio-astronomy.org/
The Society of Amateur Radio Astronomers (SARA) is a membership organization dedicated to the practice and promotion of radio astronomy among hobbyists, students, and educators. The site offers a wealth of resources including a peer-reviewed journal, educational guides for getting started, student grant programs, project sections, and details about annual conferences held across the United States.
https://w4ug.com/
The Virginia Beach Amateur Radio Club (VBARC) is the home of callsign W4UG, an ARRL Special Service club serving the Virginia Beach area with monthly meetings, license testing sessions, and public service events. Visitors can find club bylaws, membership details, local repeater information, and upcoming contests and QRP Saturdays.
http://vectorbd.com/sw_review.html
Compiled by John Lloyd (KE4UTX), this site collects shortwave receiver reviews submitted by readers of the Rec.radio.shortwave newsgroup, covering dozens of models from brands like Sony, Grundig, Icom, Kenwood, and Sangean. Each review includes pricing, dimensions, and hands-on user impressions, making it a practical reference for shortwave enthusiasts comparing receivers.