Science & Nature
1426 sites
Subcategories:
- Astronomy & Space (395)
- Chemistry (8)
- Earth Sciences (24)
- Biology (78)
- Physics (29)
- Mathematics (53)
- Weather & Climate (104)
- Amateur Radio (681)
- Electronics (46)
https://kb6nu.com/
Dan Romanchik (KB6NU) runs this long-running amateur radio blog covering news, equipment reviews, licensing study guides, and community happenings in the ham radio world. Notable features include No Nonsense study guides for Technician, General, and Extra class licenses, along with commentary on everything from MFJ equipment to repeater guides.
https://febo.com/
John Ackermann (N8UR) maintains this sprawling personal site covering ham radio, packet radio, Linux AX.25, and an unusually deep focus on time and frequency measurement including NTP servers and radio-based timekeeping. The site also touches on computer law, photography, and a personal account of keratoconus, making it a fascinating digital desktop from a dedicated technical hobbyist.
https://www.qsl.net/dk7zb/start1.htm
DK7ZB's technical antenna resource covers Yagi antenna design, the 28-ohm matching technique, and constructions for amateur radio bands including 2m, 6m, and shortwave. A deep dive into high-gain antenna building for ham radio enthusiasts, featuring the DK7ZB-Match and EME (Earth-Moon-Earth) related content.
https://scanwarewebhost.com/
G. McAvoy (KG7XD) built this resource hub centered on radio scanning, featuring a live FCC database query tool for all US AM, FM, and TV stations. Quick-links to scanner frequencies, fire, police, EMS, ham radio resources, and weather make it a handy reference for radio enthusiasts.
https://socalcontestclub.org/
The Southern California Contest Club, established in 1976, is the official web presence for a Southern California amateur radio contesting group, featuring a full calendar of upcoming ham radio contests including ARRL, CQ WPX, NAQP, and many other events. Visitors will find contest schedules, club information, and resources aimed at SoCal operators who participate in competitive radio contesting.
https://tapr.org/
TAPR (Tucson Amateur Packet Radio) is a longstanding amateur radio organization focused on advancing digital communications technology for ham radio operators. The site hosts decades of Digital Communications Conference papers, open hardware licenses, packet radio resources, and membership services for experimenters pushing the boundaries of amateur radio technology.
http://qsl.at/
DokuFunk is the world's largest archive dedicated to the history of radio and electronic media, based in Vienna with worldwide membership and over six million objects in its collection. The organization focuses on both broadcast radio and amateur radio history, preserving QSL cards and other radio-related artifacts under the motto 'No future without origins.'
https://thespacewriter.com/wp
The Spacewriter's Ramblings is the astronomy blog of C.C. Petersen, a science writer who covers space exploration, cosmology, black holes, galaxies, and missions like New Horizons with nearly 900 posts of accumulated content. From stargazing tips to in-depth commentary on NASA controversies, this site blends accessible writing with genuine scientific enthusiasm and a contributor role at Universe Today.
https://irlp.net/
The official home of the Internet Radio Linking Project (IRLP), a system that connects amateur radio repeaters around the world using Voice over IP technology. The site provides information, maps, node codes, frequencies, and technical details for ham radio operators looking to link into the IRLP network.
https://wm7d.net/hamradio
WM7D dot Net is Mark A. Downing's extensive amateur radio link directory, organized into dozens of categories covering antennas, DX clusters, propagation, QRP, Morse code, satellite info, and much more. With five pages of curated links spanning everything from ARRL headquarters to shortwave and six-meter sites, it serves as a comprehensive reference hub for ham radio enthusiasts.