Official Organizations & General Information
- ARRL (American Radio Relay League) — The national association for amateur radio in the U.S. News, regulations, band plans, and operating guidance. https://www.arrl.org/
- ARRL Operating Resources — Nets, frequency information, propagation basics, and practical operating advice. https://www.arrl.org/operating-resources
- ARRL New Ham Resources — Beginner-friendly guides for getting on the air, repeaters, and common questions. https://www.arrl.org/new-ham-resources
US Amateur Radio Band Plans & Frequency Charts
Band plans provide a voluntary guide to how amateurs share each frequency range to minimize interference. CW operation is permitted throughout all amateur bands.
- ARRL Band Plan Page — Official explanation of band plans, sharing arrangements, and mode recommendations. https://www.arrl.org/band-plan
- ARRL US Amateur Radio Bands Chart (Color PDF) — Popular printable color chart showing all HF, VHF, and UHF bands with license classes and modes. https://www.arrl.org/files/file/Regulatory/Band%20Chart/Hambands4_Color_11x8_5.pdf
- ARRL Graphical Frequency Allocations — Multiple downloadable charts (color, grayscale, black & white). https://www.arrl.org/graphical-frequency-allocations
- ARRL Frequency Allocations — Detailed text breakdown by band, including privileges by license class. https://www.arrl.org/frequency-allocations
Operating Modes
- ARRL Digital Data Modes — Clear explanations of popular digital modes including FT8, PSK31, RTTY, and others. https://www.arrl.org/digital-data-modes
- WSJT-X Official Site (FT8, FT4, JT65, WSPR, etc.) — Free software download, user guides, and documentation for weak-signal digital modes. https://wsjt.sourceforge.io/wsjtx.html
- FLDigi — Free software for RTTY, PSK31, CW, Olivia, and many other modes. https://www.w1hkj.org
POTA (Parks on the Air)
- Official POTA Website — Program rules, getting-started guides, and documentation. https://parksontheair.com/
- POTA Activations & Map — Live spotting, activation calendar, and interactive map. https://pota.app/
Propagation Forecasting
- VOACAP — Professional-grade HF propagation prediction tool for point-to-point and area coverage. https://www.voacap.com/
- HamQSL Solar & Propagation Data — Real-time solar indices and easy-to-read band condition forecasts. https://www.hamqsl.com/solar1.html
- HF+ Real-Time Propagation Map — Interactive worldwide map showing current HF band conditions. https://hf.dxview.org/
Grid Square (Maidenhead Locator) Tools
- Levine Central Grid Square Locator — Enter an address, ZIP code, or callsign to find your grid square and view it on a map. https://www.levinecentral.com/ham/grid_square.php
- QRZ GridMapper — Interactive map; click anywhere or enter a location to see grid squares and nearby stations. https://www.qrz.com/gridmapper