A small, curated set of links I keep coming back to. Not exhaustive — just the ones I actually use or recommend. If something here is broken or you have a suggestion, send me a note.
Logbooks & QSL
- QRZ.com — callsign lookup and the most popular online logbook
- LoTW — ARRL’s Logbook of the World, the gold standard for confirmations
- HRDLog — online log with real-time spotting
- QSORipper — in collaboration with AE7XI, a custom built multi-engine cross-platform logger experiment
Propagation & Spotting
- VOACAP Online — HF propagation prediction
- PSK Reporter — see who’s hearing you on digital modes
- WSPRnet — beacon mode propagation database
- DX Heat — modern, fast DX cluster web UI
- SWPC Solar Indices — current SFI, K, A, geomagnetic conditions
Software
- WSJT-X — FT8, FT4, JT65, MSK144 and other weak-signal modes
- FLDIGI — RTTY, PSK, MFSK, and other classic digital modes
- HDSDR — the only SDR software I’ve experimented with so far - works great for my purposes so far
CW (Morse Code)
Activity Programs
- POTA — Parks on the Air, which I am loving chasing since getting back on the air
- Real-time POTA spots — great way to find who you can likely work right now
- SOTA — Summits on the Air
- ARRL Field Day — the big yearly emergency-prep exercise
- WA7BNM Contest Calendar — find active contests
Antennas, Mobile & Reference
- K0BG.COM Archive Removal Notice - The archive was removed at Alan Applegate’s request
- DX Engineering Technical Articles — well-written antenna and station notes
- 4nec2 — free NEC2-based antenna modeling
Repeaters / VHF
- RepeaterBook — global crowd-sourced repeater directory
Licensing & Learning
- ARRL — national association; classes, contests, awards
- HamStudy.org — the best free study tool for Tech / General / Extra
Misc
- Ham Radio Workbench Podcast — practical, project-focused