Amateur Radio
682 sites
https://radio-astronomy.org/
The Society of Amateur Radio Astronomers (SARA) is a membership organization dedicated to the practice and promotion of radio astronomy among hobbyists, students, and educators. The site offers a wealth of resources including a peer-reviewed journal, educational guides for getting started, student grant programs, project sections, and details about annual conferences held across the United States.
http://qslnet.de/member1/dl0cpm
DL0CPM is the club station of the Christliche Pfadfinder Mettmann (Christian Scouts) in Germany, operated by licensed amateur Veit Pelinski (DL7ET). The site covers their participation in the annual JOTA (Jamboree on the Air) event and their active involvement in ARDF (Amateur Radio Direction Finding), also known as fox hunting.
https://hflink.com/
HFLINK is the international hub for ALE (Automatic Link Establishment) high-frequency ham radio communications, covering HF interoperability, selective calling (SELCALL), and emergency communications. Visitors can find ALE frequencies, band guides, software resources, propagation data, and archives from HF interoperability exercises dating back years.
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.
http://k0bg.com/
K0BG is a comprehensive amateur radio resource run by Alan Applegate, focusing heavily on mobile ham radio installations, antenna theory, and RF bonding techniques. The site is packed with detailed technical articles, diagrams, and practical guidance that make it a go-to reference for hams interested in operating from vehicles.
https://clarc.org/
The Clear Lake Amateur Radio Club (CLARC), operating under callsign K5HOU, has served the Clear Lake, Texas area since 1987 as an ARRL Special Service Club. Visitors can find information about weekly nets on the club's repeaters, licensing exams, Hamster Classes, and community communications support for public events.
http://w0crc.org/
The Crow River Amateur Radio Club is a regional ham radio club with pages covering repeaters, reflectors, and links to ARRL resources. The site serves as a hub for local amateur radio operators in the Crow River area, offering member resources and monitoring tools.
http://smallwonderqrp.blogspot.com/2019/04/fiero-compact-qrp-ssbcw-transceiver.html
K.P.S. Kang's blog dedicated to QRP (low power) radio transceiver design, featuring detailed technical write-ups on homebrew SSB/CW transceivers like the FIREO, which uses an innovative FM limiter circuit for speech compression. A must-read for ham radio enthusiasts interested in minimalist radio construction and RF engineering theory.
https://frrl.org/
The Fox River Radio League (FRRL) is a century-old amateur radio club based in the Fox Valley area of Illinois, offering meetings, license testing, repeaters, and Field Day events to radio enthusiasts. With over 100 years of history and a congressional record entry marking its anniversary, this club site serves as a hub for both seasoned operators and newcomers seeking licensing exams and community.
https://f1rum.fr/
F1RUM's blog is a French amateur radio enthusiast's personal journal covering topics like Meshtastic mesh networking, Morse code learning challenges, SOTA field operations, SDR hardware, and digital modes like MFSK. The site also includes a logbook and digimap, and participates in the Fediverse.Radio web ring, making it a genuine hub for the radioamateur community.