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)
http://warac.org/
The West Allis Radio Amateur Club (W9FK) is a Wisconsin-based ham radio organization that sponsors the Wisconsin QSO Party and the David Knaus Memorial Scholarship. Visitors can find club news, event information, and resources for amateur radio enthusiasts in the greater Milwaukee area.
https://radioamator.ro/
Radioamator.ro is a comprehensive Romanian-language portal for amateur radio operators, covering everything from equipment construction and digital communications to DX activities, contest calendars, and propagation bulletins. The site serves the Romanian ham radio community with articles, a callbook, forums, and links to the Romanian Amateur Radio Federation.
http://charlieselectronics.com/
Charlie's Electronics is the home base of AB5U, a Dallas-area ham radio operator running multiple UHF and VHF repeaters across the Dallas-Rowlett-Garland region. The site covers amateur radio topics, two-way radio repair services, off-grid power and cooling for field operations, and practical electronics tips.
http://scotese.com/
The PALEOMAP Project, run by Christopher Scotese, is a comprehensive scientific resource illustrating the plate tectonic development of Earth's ocean basins and continents over the past 1.1 billion years. Visitors can explore full-color paleogeographic maps, interactive 3D PaleoGlobes, animations of ancient Earth configurations like Pangea, and download materials for geology education.
http://k5dkz.com/
Frank Kamp's K5DKZ ham shack site is a rich technical resource covering homebrew radio equipment, antennas, amplifiers, and repairs for classic rigs like Collins, Drake, and Heathkit gear. Visitors will find detailed pages on building tube amplifiers, Z-match tuners, DX-60 and DX-20 clones, and a wide variety of antenna designs from vertical beams to trap dipoles.
https://wm7d.net/
Mark Downing (WM7D) runs this ham radio hub featuring a searchable callsign database, real-time solar flux reports, and dedicated resource pages for Yaesu radios including the FT2000, FT920, and FT100. Visitors will also find DX cluster links, QSO maps, TR Log for Linux, and a curated collection of amateur radio links.
http://k1kkm.org/
K1KKM is a personal amateur radio operator's site identified by the distinctive callsign in the domain name. Though the page text is minimal, the callsign format strongly suggests a ham radio enthusiast sharing their station and hobby activities.
https://www.qsl.net/ecara
ECARA appears to be an amateur radio club or organization hosted on QSL.net, the well-known hosting platform dedicated to ham radio operators and groups. The directory index suggests a collection of club files and resources, likely including meeting info, member details, or radio-related documents.
https://atmos.uw.edu/marka/id.normals.html
A reference page from the University of Washington's atmospheric sciences department presenting observed climate normals for Idaho and western Montana spanning 1971 to 2000. Visitors can click on map markers to view mean monthly precipitation, mean daily maximum temperatures, and mean daily minimum temperatures for specific locations.
https://mrasz.hu/
The Magyar Rádióamatőr Szövetség (MRASZ) is the official national amateur radio society of Hungary, organizing contests, events, and news across shortwave, UHF, radio direction finding, and high-speed telegraphy disciplines. The site features competition announcements, a QSL bureau, licensing information from the NMHH authority, and resources for Hungarian radio amateurs at all levels.