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://www.radioing.com/
Radioing.com, created by Charlie Bautsch (W5AM), is a sprawling amateur radio network covering everything from licensing guides and RF calculators to virtual museums of classic Collins Radio equipment and vintage transceivers. With over 4,000 ham radio links, callsign search tools, Morse code resources, classified ads, and a remote station, this site is a comprehensive hub for both newcomers and seasoned hams.
https://abrohamnealsoftware.com/
Neal K3NC's retirement announcement page for Abroham Neal Software, a company that developed amateur radio software including DXBase 2007 for logging and DX cluster operations. The site now serves as a legacy resource, offering free registration files and key generation tools for former customers of the now-closed software business.
https://apod.nasa.gov/apod/archivepix.html
The legendary NASA Astronomy Picture of the Day archive is a comprehensive chronological index linking to thousands of daily astronomy images spanning from 1995 to the present, each accompanied by expert explanations written by professional astronomers. Featuring entries on nebulae, planets, eclipses, star clusters, and deep-sky objects, this archive is an endlessly explorable treasure trove for anyone fascinated by the cosmos.
https://w4ug.com/
The Virginia Beach Amateur Radio Club (VBARC) is the home of callsign W4UG, an ARRL Special Service club serving the Virginia Beach area with monthly meetings, license testing sessions, and public service events. Visitors can find club bylaws, membership details, local repeater information, and upcoming contests and QRP Saturdays.
https://dxing.com/
DXing.com is a comprehensive reference site sponsored by Universal Radio Research, covering shortwave listening, scanner monitoring, ham radio, pirate radio, numbers stations, and more. Originally created by noted author Harry Helms, it features receiver surveys, frequency guides, QSL reporting tips, and columns from well-known radio writers like Glenn Hauser and Don Schimmel.
https://rmastro.com/
The Roper Mountain Astronomers (RMA) is a South Carolina astronomy club dedicated to sharing observational skills and astronomical knowledge with enthusiasts of all levels. The site features member astrophotos, club event listings, star parties, outreach programs, and highlights the historic 23-inch Charles E. Daniel Observatory refractor telescope.
https://www.qsl.net/iz7ath/web/02_brew/brew_eng.htm
IZ7ATH's homebrew section is a treasure trove of DIY amateur radio projects covering antennas, RF devices, shack accessories, and test instruments. Visitors will find detailed build guides for cubical quads, delta loops, linear amplifiers, baluns, antenna rotators, and beginner soldering tutorials all in one place.
https://radiomasterlist.com/en/index.html
RadioMasterList.com is a comprehensive reference directory cataloging specifications, performance data, and prices for hundreds of amateur radio transceivers, professional receivers, SDRs, and vintage radios from brands like Yaesu, ICOM, Kenwood, and more. Whether you're comparing HF transceivers or hunting down specs on a classic 1970s shortwave receiver, this site serves as a go-to database for radio enthusiasts and serious operators alike.
https://www.qsl.net/w1aa/w1aa_1001.htm
Documenting the 2003 Marconi 100th Anniversary Special Event station operated by the Marconi Radio Club (W1AA) and the Marconi Cape Cod Memorial Radio Club (KM1CC) near the historic Cape Cod transmission site, this site captures a milestone commemoration that logged over 13,000 contacts worldwide. Highlights include a rare contact with the International Space Station and a presidential commemorative message from George W. Bush, making it a fascinating record of amateur radio history in action.
https://www.qsl.net/nx0g
The Mountain Amateur Radio Club (MARC) is a ham radio club based in Teller County, Colorado, serving local amateur radio enthusiasts in the region. This page is a redirect notice pointing visitors to the club's new home at nx0g.org, with very little remaining content at this location.