Science & Nature
1439 sites
Subcategories:
- Astronomy & Space (396)
- Chemistry (8)
- Earth Sciences (26)
- Biology (79)
- Physics (30)
- Mathematics (59)
- Weather & Climate (104)
- Amateur Radio (682)
- Electronics (47)
https://vkham.com/
VKHam is a comprehensive Australian amateur radio resource hub run by VK2CA, featuring over 12,000 QSL card images, a directory of 1800+ VK callsigns, repeater maps for all Australian states, and DX information. The site also offers kit and radio manuals, electronics resources, frequency tables, and a classifieds section specifically for the Australian ham radio community.
https://journal.jcampbell.ca/
Jim Campbell (VE1KM) keeps this personal journal documenting his amateur radio adventures, including Parks on the Air activations, balun testing, 3D-printed ham radio accessories, and Morse Code operating tracked via the Reverse Beacon Network. Live feeds of his recent QRZ contacts, POTA stats, and Mastodon posts make this a genuinely active ham radio log worth bookmarking.
https://www.qsl.net/w5wx
A QSL.net-hosted personal page for amateur radio operator W5WX, accessible via the QSL.net directory structure. The site appears to be a file index for a ham radio enthusiast's web presence on one of the most popular amateur radio hosting services.
http://qrparci.org/
QRP ARCI is the QRP Amateur Radio Club International, a 16,000-member organization dedicated to low-power ham radio operating and homebrewing. The site hosts contest schedules, a Hall of Fame, links to kits and supplies, and the full contents of their quarterly magazine featuring technical articles by prominent QRP operators.
http://users.marktwain.net/aschmitz/home.html
KB0YKI's Radio Zone is Aaron Schmitz's amateur radio resource featuring antenna building hints, gamma match plans, repeater building guides, and online tools like a Yagi designer and J-Pole designer. The site also includes a QSL card maker, regional scanner frequencies, and a repeater map, making it a handy reference for ham radio hobbyists.
https://www.qsl.net/kc4gzx/kc4gzx/index.htm
KC4GZX is a ham radio enthusiast's site packed with homebrew DIY projects covering antennas, amplifiers, filters, transmitters, receivers, and test equipment. It also serves as a regional resource for Northeast Georgia amateur radio operators, featuring ham directories, repeater listings for multiple southeastern states, and hamfest schedules.
http://panther-observatory.com/
Johannes Schedler's Panther Observatory showcases stunning astrophotography covering the moon, sun, planets, comets, deep sky objects, and constellations, including imaging results from a semi-professional remote observatory at CTIO in Chile. The site also invites visitors to stay at a guest house in Altaussee, Austria, offering dark skies and alpine observing facilities.
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.
http://rgbrown.org/
Robert G. Brown, a physicist at Duke University, shares an extensive collection of free online textbooks, physics study materials, poetry collections, philosophy essays, and beowulf cluster computing resources. The site is a sprawling intellectual hub covering everything from GPL software tools to metaphysics, all freely licensed under an open public license.
https://trac.org.tr/
TRAC (Türkiye Radyo Amatörleri Cemiyeti) is the official national amateur radio society of Turkey, founded in 1962, serving licensed ham radio operators across the country with regional chapters and representatives. The site offers callbook lookups, VHF/UHF contest results, QSL bureau services, repeater information, EchoLink and APRS guides, and resources for obtaining an amateur radio license in Turkey.