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://wt4ra.org/
The Western Tidewater Radio Association (WTRA) is an ARRL-affiliated amateur radio club serving Isle of Wight, Surry, and Southampton Counties in Virginia. The site lists upcoming events like QSO parties, flea markets, and Field Day, plus club resources including repeater info, ARES emergency communications, membership rosters, and weather service links.
https://livermoreark.org/
The Livermore Amateur Radio Klub (LARK) is a nonprofit club founded in 1959 serving the Tri-Valley area of California, affiliated with the ARRL and open to both licensed and unlicensed members. The site covers club membership, FCC licensing and testing sessions, net schedules, newsletters, and emergency communications support for local cycling events.
https://www.qsl.net/smcara/club_members.html
The St. Mary's County Amateur Radio Association (SMCARA) has been supporting amateur radio operators in southern Maryland since 1956, and this page presents their full club membership roster with call signs, license classes, and ARRL/volunteer examiner status. With 62 members listed and resources for becoming a ham radio operator, the site offers a solid look at an active regional ham radio club.
https://qsl.net/we4ncs
The NC State Alumni Amateur Radio Association (WE4NCS) connects NC State University alumni who hold amateur radio licenses, serving as a community hub for Wolfpack grads passionate about ham radio. The site features an alumni registry form, a list of licensed NC State alums, and links to university resources, sports, and engineering programs.
https://vvara.org/index.html
The Verde Valley Amateur Radio Association (VVARA) serves ham radio enthusiasts in north-central Arizona, providing club meeting schedules, net listings, repeater information, and foxhunt resources. Regular nets like the Knobby Knee Net and 60s Trivia Net reflect an active local community, and the site even includes a live weather camera feed from Mingus Mountain.
https://www.qsl.net/n1bwt/contents.htm
Paul Wade W1GHZ has published his comprehensive Microwave Antenna Book online, covering everything from parabolic dish antennas and horn feeds to electromagnetic field analysis and antenna range measurements. A deep technical reference spanning 13 chapters with downloadable software tools, this is an essential resource for amateur radio operators working in the microwave frequency bands.
https://ourcolorfulcosmos.com/
Steve Mazlin, MD shares his stunning astrophotography collection at Our Colorful Cosmos, featuring images organized into sections covering nebulae, galaxies, star clusters, and the solar system. The image-heavy site showcases deep-sky photography from a dedicated personal observatory, with a companion YouTube channel under the handle 'mazlinithegreat' for additional content.
https://farcircuits.net/
Far Circuits is a long-running manufacturer and supplier of printed circuit boards designed specifically for amateur radio and electronics hobbyist projects, operating out of Dundee, Illinois for over 35 years. Visitors can browse and order boards organized by category including audio amps, frequency standards, converters, keyers, battery chargers, and direction-finding projects, with ordering handled through PayPal.
https://r-clarke.org.uk/
A comprehensive amateur astronomy resource covering the monthly night sky, planetary facts, eclipse details, Messier objects, telescope guides, and an astro dictionary for beginners. The site also extends into amateur radio with club listings, beginner guides, and rally information with GPS postcodes.
https://qsl.net/kb1ckf/ham_radio_links.htm
Mike (KB1CKF) has assembled a comprehensive ham radio links page covering SATERN emergency communications chapters, Massachusetts amateur radio clubs, ARRL resources, repeater directories, and major radio equipment manufacturers. A handy reference for New England amateur operators, with particular emphasis on emergency radio networks and local clubs in the Eastern Massachusetts area.