Amateur Radio
682 sites
http://arrl.org/
The American Radio Relay League (ARRL) is the official national membership organization for amateur radio operators in the United States, offering news, licensing resources, regulatory advocacy, and publications like QST magazine. A comprehensive hub for ham radio enthusiasts at every level, the site covers contests, digital networking, solar updates relevant to propagation, and community events.
https://copaseticflow.blogspot.com/
Copasetic Flow is a technically rich blog blending amateur radio operations with hands-on software experiments, covering topics like POTA activations, antenna comparisons, QSO logging, and ionogram analysis. The author also documents AI and programming experiments with tools like ChatGPT, Codex CLI, and the Whisper API, making it a fascinating intersection of ham radio and modern tech tinkering.
https://qsl.net/sv2ael/greekhamail.htm
Created by Greek amateur radio operator SV2AEL, this page is a comprehensive alphabetical directory of over 580 email addresses for licensed ham radio operators across Greece, organized by callsign prefix. A unique and practical reference for the Greek ham radio community, it covers all SV, SW, SX, and SZ callsign districts and is maintained as a personal initiative by Savas Pavlidis.
https://dbbear.com/k0emt
K0EMT is a well-stocked amateur radio resource from a Missouri ham covering antenna projects, kit building, QRP portable operation, Morse code learning, and POTA activations. Visitors will find detailed build logs, operating aids, equipment tips, and software projects spanning everything from EFHW transformers to DXSpot interfaces.
https://cdxa.org/
The Carolina DX Association (CDXA) is a ham radio club based in the Carolinas, dedicated to DX hunting and contesting under callsign W4DXA. The virtual club room offers members antenna calculators, packet cluster links, photo albums, contest resources, roster management, and event payment tools for club luncheons.
http://wa1mba.org/
Tom WA1MBA has built a comprehensive resource dedicated to microwave amateur radio, covering everything from 10GHz rainscatter propagation to millimeter wave band projects, waveguide design, and LNA and quadrupler hardware builds. Active since 1996, the site features technical papers, conference presentations, RF connector guides, and a mailing list reflector for fellow microwave ham enthusiasts.
https://www.qsl.net/af4nj
The QSL.net file directory for AF4NJ hosts a rich collection of ham radio resources including DX maps, LOTW logs, solar data, weather lab files, and audio recordings. Folders referencing ARRL, WWV, DXMAP, and warning maps point to an active amateur radio operator with interests spanning propagation, weather monitoring, and emergency communications.
http://mndmr.net/
MNDMR.net is the home of Minnesota's first in-house DMR repeater CBRIDGE network, providing information about connected repeaters, talkgroups, and codeplugs for digital radio users in the region. The site serves the local amateur radio community with resources for the MNSTATE and MNTAC talkgroups on the Brandmeister network.
http://ka6wke.blogspot.com/
Mark Schoonover (KA6WKE) shares his amateur radio experiences, including homebrew antenna tuner builds, HF mobile setups, and equipment reviews for his IC-7000 and IC-706MKIIg rigs. The site features hands-on technical posts about Z-match tuners, horizontal loops, and ladder line feeding, making it a useful read for hams interested in practical antenna projects.
http://marcmvra.net/
The Mankato Area Radio Club (MARC) has served amateur radio operators in southern Minnesota since 1954, and this official site provides meeting details, repeater frequencies, local net schedules, and VE testing information. A great resource for hams in the Mankato region looking to connect with a local club or find area frequency programming.