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://qsl.net/we1fly
The Aeronautical Mobile Operators Club, callsign WE1FLY, is dedicated to ham radio operators who take their hobby airborne, earning the nickname 'Flyin' Hams.' The site provides resources on operating amateur radio in aircraft, including links to FAA regulations, QRZ.com profile info, and eQSL lookup for members.
http://monitoringtimes.com/html/mttopHF.html
Monitoring Times presents a curated list of over 1000 active HF frequencies compiled by Larry Van Horn (N5FPW), covering military, marine, government, and civil air patrol communications worldwide. A valuable reference for shortwave listeners and scanner enthusiasts, the list spans frequencies from 2 MHz to nearly 30 MHz with detailed mode and geographic information.
https://qsl.net/scoutradio
Scout Radio appears to be a site dedicated to amateur radio activities within the Scouting community, combining two classic youth and hobbyist traditions. The image-heavy layout and QSL.net hosting strongly suggest this is a ham radio club or station operated by or for Scout groups.
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.
https://pskreporter.info/
PSK Reporter is a real-time propagation reporting network for amateur radio digital modes, collecting reception data from operators worldwide to show where signals are being heard. Built by Philip Gladstone, it supports modes like FT8 and PSK31, offers map displays and statistics, and even contributes data to ionospheric research and government licensing investigations.
https://www.qsl.net/w4amc
The Brightleaf Amateur Radio Club (BARC) of Greenville, NC maintains this hub for club members and ham radio enthusiasts, featuring meeting info, membership rosters, newsletters, and emergency preparedness resources. With callsigns W4AMC, W1VOA, and W4UHS, the club covers everything from Skywarn weather spotting to DX activity links and real-time solar data.
http://audible.transient.net/archive
The Music Electronics µArchive is a long-running reference hub for DIY guitar effects and audio electronics, offering schematics archives, FAQs, and curated links to the best resources on the web. Highlights include a downloadable schematics archive, guides on tube amplifiers and transistor identification, and an Electro-Harmonix parts sheet for builders working with vintage pedal components.
https://pfaf.org/user/Default.aspx
Plants For A Future (PFAF) is a searchable database of over 8,000 plants catalogued by their edible, medicinal, and other practical uses, making it an essential reference for permaculture enthusiasts and herbalists alike. The site covers topics ranging from food forests and carbon farming to rare and unusual perennial plants, with browsable indexes and habitat guides built up over decades by a UK-registered charity.
https://minnesotasky.tripod.com/
The Steele County Astronomical Society (SCAS) is an Owatonna, Minnesota-based astronomy club affiliated with the Astronomical League, organizing events like Messier Marathons, park viewing nights, and observatory tours. The site lists the club's annual schedule, membership information, and links to the Owatonna Clear Dark Sky Report for planning observation sessions.
https://www.qsl.net/n1pce
John N1PCE runs the Northern New Hampshire AllStar Network, a linked repeater system spanning Whitefield and Groveton with VHF/UHF nodes and a DMR BrandMeister connection on Cannon Mountain. The site lists node frequencies, CTCSS tones, ASL node numbers, and a weekly 'North Country Weather Net' schedule for amateur radio operators in the north country region.