Science & Nature
1439 sites
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- Amateur Radio (682)
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https://k7mva.org/mvhams.html
The Magic Valley Amateur Radio Club (MVARC), operating under callsign K7MVA, is a ham radio club based in Idaho with sections for nets, repeaters, testing, and ARES-RACES emergency communications. This redirect page points visitors to the club's new home at K7MVA.org, where members can access meeting minutes, bylaws, licensing resources, and a free ham software listing.
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.
https://ve7sar.blogspot.com/2026/03/the-sarc-communicator-march-april-2026.html
The digital home of the SARC Communicator, the newsletter of Surrey Amateur Radio Communications in Surrey, BC, this blog publishes bi-monthly issues packed with homebrew projects, DX expedition reports, radio equipment reviews, and amateur radio history. Each edition offers hands-on technical content alongside club news, making it a rich resource for ham radio enthusiasts of all experience levels.
https://setiathome.ssl.berkeley.edu/
SETI@home is the legendary UC Berkeley distributed computing project that enlisted millions of volunteers worldwide to analyze radio telescope data in the Search for Extraterrestrial Intelligence. Though now in hibernation and no longer distributing tasks, the site preserves its community message boards, user statistics, and ongoing back-end data analysis efforts that continue to this day.
https://astronomy-links.net/SETI_Battleship.html
Clark M. Thomas offers a witty essay examining the movie Battleship through the lens of real SETI science, exploring the plausibility and implications of contact with extraterrestrial civilizations. The piece weaves together astronomy, pop culture criticism, and philosophical musings about what our radio and TV signals might reveal to any alien observers.
http://rfchoke.com/
A technical reference site dedicated to RF chokes, ferrite cores, and related radio frequency electronics components used in amateur radio and RF engineering applications. Visitors will find practical information on choke design, impedance characteristics, and suppression of common-mode currents on antenna feedlines.
http://uksmg.org/content/deadband.htm
Written by Palle Preben-Hansen (OZ1RH), this technical article explains how radio amateurs can make long-distance contacts on the 50MHz (Six Meter) band by exploiting meteor scatter propagation even when the band appears dead. It covers meteor trail geometry, shower timing, diurnal and seasonal meteor rate variations, and practical operating techniques, with supporting figures and links to software and IARU procedures.
https://chicagofmclub.org/
The Chicago FM Club (CFMC) is a Chicagoland amateur radio club established in 1965 with over 150 members, operating five repeaters and hosting nightly nets, monthly fox hunts, and the annual Radio Expo ham fest. The site covers club membership, FCC exam testing, public service events, and social gatherings for hams in the greater Chicago area.
http://ka7oei.blogspot.com/2026/03/modifying-mfj-5008-parabolic-ultrasonic.html
KA7OEI is Clint's technically-focused amateur radio and electronics blog, covering hands-on modifications and experiments with devices like the MFJ-5008 parabolic ultrasonic receiver. This particular post dives deep into improving the sensitivity and frequency response of the discontinued ultrasonic tool, with detailed photos, circuit analysis, and practical applications like bat detection and power line fault finding.
https://www.qsl.net/ema-arrl/clublist.html
A comprehensive directory of amateur radio clubs across Eastern Massachusetts, organized under the ARRL Eastern Massachusetts section. Visitors will find dozens of clubs listed by name with links, spanning general, repeater, packet, contest, school, and company club categories.