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://tcrc.org/
The Twin Cities Repeater Club (TCRC) is a Minnesota-based amateur radio club centered around the 147.210 MHz repeater, which also serves as the primary frequency for South Metro Skywarn weather spotting. Visitors can find repeater information, club calendars, hamfest listings, VE exam resources, and weekly net schedules for Twin Cities-area ham radio enthusiasts.
http://science-workshop.com/
Science Workshop appears to be a science-oriented site, though its content is extremely minimal with only a single image visible at crawl time. The domain name suggests a focus on science education or hands-on scientific topics, but without further content the site's exact subject remains uncertain.
https://www.qsl.net/paara
The Palo Alto Amateur Radio Association (PAARA) maintains this club homepage listing meeting times, net schedules, and operating award details for their active weekly net on the W6APZ repeater. A snapshot of early 2000s ham radio club life in the San Francisco Bay Area, complete with a newsletter archive and contact information for local members.
https://rutar.org/
Alex Rutar is a mathematics postdoctoral researcher specializing in fractal geometry, dynamical systems, and dimension theory, with affiliations at the University of Jyväskylä and a PhD from the University of St Andrews. His site serves as an academic hub linking to his publications, expository writing, CV, and open-source developer tools built around LaTeX and terminal utilities.
https://pzk.org.pl/news.php
The Polish Amateur Radio Union (Polski Związek Krótkofalowców) is the largest national organization in Poland dedicated to amateur radio communication and satellite radio services. The site serves as the official hub for PZK members, featuring weekly bulletins, news updates, a callsign lookup database, and organizational resources in both Polish and English.
https://qsl.net/w1crs
The Connecticut Radio Society (W1CRS) is a ham radio club based in Connecticut, inviting active amateur operators to join their community. The site features a patriotic theme with references to CW (Morse code) keying and special transmissions, reflecting the club's dedication to traditional amateur radio operation.
https://pskreporter.info/pskmap.html
PSKReporter is a real-time propagation mapping tool that aggregates reception reports from amateur radio operators worldwide, showing who is hearing whom across bands and digital modes like FT8, JT65, and PSK31. Created by Philip Gladstone, the interactive map lets operators filter signals by callsign, country, grid square, mode, and time window, making it an invaluable tool for monitoring radio propagation conditions.
https://ucares.org/
UCARES is the Utah County Amateur Radio Emergency Service, a volunteer group of licensed ham radio operators dedicated to providing emergency communications when conventional infrastructure fails. The site covers membership, nets, repeaters, certification, and public service events for hams in Utah County serving their community during disasters and emergencies.
http://f5ad.free.fr/
Built by French radio amateur André Ducros (callsign F5AD), this extensive site covers amateur radio antennas, amateur television (ATV), and ham radio licensing with over 616 pages and 2648 images. It includes 1205 practical antenna descriptions ranging from shortwave to microwave, technical documentation, and resources for ATV transmission, making it a remarkable reference archive for French-speaking radio amateurs.
https://n8ara.org/
The Newark Amateur Radio Association (N8ARA) serves ham radio enthusiasts in central Ohio, providing a community hub for licensed operators in the Newark area. Visitors can learn about club membership, meetings, and local amateur radio activities in the region.