Amateur Radio
682 sites
http://k3pgp.org/
K3PGP's Experimenter's Corner is a wide-ranging amateur radio and electronics hobbyist site covering everything from VLF to light, including moonbounce (EME), lasers, antenna construction, and weak signal work. Run by the operator K3PGP, the site spans decades of experimentation and also touches on astronomy, bicycle construction, and software.
http://flashwebhost.com/tcvr
Created by VU3PRX, this site provides detailed circuit diagrams and construction guides for a 7MHz SSB transceiver built around the MC1496 integrated circuit. The project covers every stage from VFO and ladder filters to power amplifiers and antenna design, making it a practical reference for hams looking to build their own HF radio from scratch.
https://n3yrw.tripod.com/index-3.html
Frank N3YRW's ham radio link collection is a curated gateway to the world of amateur radio, covering DX hunting, callsign lookups, equipment dealers, antennas, and upcoming DXpeditions. Packed with dozens of links to resources like QRZ, ARRL, Icom, Yaesu, and DX clusters, this page is a handy one-stop reference for hams of all experience levels.
https://swling.com/blog/2026/03/shelfmarks-and-shortwave
The SWLing Post is a dedicated blog covering shortwave listening, ham radio, DXing, SDR technology, and radio broadcasting from around the world. With reviews, program schedules, equipment guides, and community contributions, it's a rich hub for radio enthusiasts of all stripes.
http://txvhffm.org/
The Texas VHF-FM Society is a non-profit organization dedicated to frequency coordination and establishing standards for amateur radio repeaters across the state of Texas. Visitors can search repeater listings, renew coordinations, access technical articles, and find information about general meetings and board elections.
http://slvrc.org/
The Saint Lawrence Valley Repeater Council (SLVRC) coordinates amateur radio repeater frequencies across Franklin and St. Lawrence Counties in New York, Eastern Ontario, and Western Quebec. The site outlines council policies, subaudible tone plans, and county coverage, serving a bilingual English-French ham radio community that has been active for over 30 years.
https://www.vkham.com/
VKHam is a comprehensive Australian amateur radio resource hub run by VK2CA, featuring over 12,000 QSL card images, a directory of 1800+ VK callsigns, repeater maps for all Australian states, and an extensive electronics and kit manual library. Visitors can look up VK callsigns, browse DX information, access frequency and Morse code references, and even post classified ads for ham radio equipment.
https://www.qsl.net/wb4hfn
WB4HFN is an amateur radio resource site covering antenna construction, digital communications, equipment modifications, and vintage R.L. Drake radio gear from the 1960s and 70s. The site also features a UHF repeater system on 443.200 MHz serving northern Massachusetts and southern New Hampshire, along with local weather data and ham radio club links.
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://umass.edu/rso/hamradio
The official homepage of the UMASS Amateur Radio Club (callsign W1PUO), a student-run club at the University of Massachusetts Amherst founded in 1996 by College of Engineering students. The club offers a shared radio shack, licensing classes for prospective hams, and public service events open to all five-college university students, faculty, staff, and their families.