I am thrilled to introduce #VOACAP Online for SWL – a free-of-charge dedicated shortwave propagation prediction service designed specifically for shortwave listeners (SWL). Accessible at www.voacap.com/swl/, this powerful online tool brings professional-grade propagation analysis to your fingertips.

Notice #VOACAP Online users: In recent Chrome/Edge browser versions, SVG rendering of thin lines has regressed. VOACAP Online’s propagation wheels may look broken or jagged. Firefox/Safari display them correctly - use those for best results until Chromium fixes this.

Two exciting new DXpeditions have just been added to the #VOACAP DX Charts: * S21SDX – Bangladesh (Nov 11–17, 2025) * J38W – Grenada (Nov 23 – Dec 3, 2025) Check them out at voacap.com/dx/ . Good DX and may the bands be open!

NEWS! Generate VOACAP coverage maps fast with Go. Run Python predictions, then render MUF/REL/SNR50/SNR90/SDBW via plot_maps.go or via its compiled binary. Skips existing files, runs in parallel, shows progress. 216 maps take 2 minutes to plot (9 bands x 24 hours). Code: github.com/OH6BG/VOACAP...

Major update to my #VOACAP tools: github.com/OH6BG/VOACAP... - run_p2p_matrix.py: safer, cleaner point-to-point predictions - plot_maps.py: generates VOACAP coverage maps, now fully compatible with the HamCAP DX Charts framework I just updated yesterday. Demo: www.voacap.com/dx/cy0s/hamc...

New release: HamCAP Maps → github.com/OH6BG/HamCAP... . A lightweight client-side viewer for #VOACAP coverage maps made with HamCAP: multi‑band, 3 time slots, lazy‑loading, LRU cache, keyboard access, theme toggle & zoom‑in‑tab. See 3Y0K Bouvet, Feb 2026 demo → www.voacap.com/dx/3y0k/hamc...

NEWS: Launched an ADIF → Cabrillo Converter, a lightweight, single-file HTML/JS/CSS tool that runs 100% in your browser. Drag & drop (or browse) your ADIF file, click “Process,” then preview and download a Cabrillo log — no installations, no servers, no data leaks. 👉 github.com/OH6BG/OH6BG-...

A lot of backend refactoring done at #VOACAP online (www.voacap.com/hf) to make the services more robust. Added new visual cues for ITU Wheel predictions: progress is now shown directly in the button w/ light red background color. Each run takes about 5 seconds, so a little patience is appreciated.

Two upcoming operations now have their own dedicated propagation prediction sites at #VOACAP DX Charts (voacap.com/dx/), including VOACAP and ITURHFProp forecasts plus detailed sunrise/sunset times: * 5K0UA – San Andres Island (Oct 20–30, 2025) * FW5K – Wallis and Futuna (Oct 20 – Nov 7, 2025)

Opened a special propagation site for 5R8TT & 5R8XX Madagascar (Oct 29–Nov 12, 2025), now on the #VOACAP DX Charts list (voacap.com/dx/5r8tt/). Features VOACAP & ITURHFProp predictions, sunrise/sunset data, and an azimuthal equidistant map. Good DX!

Updated #VOACAP DX Charts with propagation predictions for 9L8MD Sierra Leone (Oct 30–Nov 10, 2025). As we heard, 3C2MD Equatorial Guinea was cancelled. But now a special site with VOACAP & ITURHFProp data + sunrise/sunset times is live for 9L8MD: voacap.com/dx/9l8md/ — Good DX!

Update on #VOACAP DX Charts: New special prediction sites live! - A52G Bhutan — Oct 1–8, 2025 - 3G0YR/CE0Y Easter Isl — Nov 26–Dec 3, 2025 Includes VOACAP/ITURHFProp propagation predictions, sunrise/sunset analysis + azimuthal equidistant maps. Good DX! 👉 voacap.com/dx/

To keep www.voacap.com and all its online services running smoothly, a quick bot check may appear on your first visit — and occasionally after. It helps block automated traffic and ensures real users get fast access. Thanks for your patience and understanding!

Update on #VOACAP DX Charts (voacap.com/dx/): OJ0YL & OJ0W Märket Reef DXpedition (Sep 20–26, 2025), IOTA EU-053; 160M-6M; CW, FT8, SSB. Special VOACAP site at voacap.com/dx/oj0yl/, in-depth propagation analysis, sunrise/sunset times. If they land early, they participate in SAC CW. Good DX!

New special detailed sites on #VOACAP DX Charts for KH9/K9HEI Wake (Aug), 3G0XQ San Ambrosio (Oct/Nov), PY0S St. Peter & St. Paul (Oct/Nov), PJ6Y Saba (Oct 17–29), 9U1RU Burundi (Oct 29 – Nov 19), PJ7UK St Maarten (Nov 28 – Dec 7), CY0S Sable (March 2026) and VP0SG So. Georgia (March 2027). Gud DX!

Excited to unveil the fresh layout for #VOACAP DX Charts! Now featuring light & dark mode, collapsible Antennas & Featured DX sites sections. Dedicated VOACAP prediction sites also got a sleek upgrade! Dive in at voacap.com/dx/

#VOACAP DX Charts updated! Now featuring predictions for 3C0W Annobon & 3C3W Equatorial Guinea (Sep 2025). Get in-depth, band-specific predictions & sunrise/sunset times for September. voacap.com/dx/ ...Good DX!

The #VOACAP Online band-by-band analysis (menu: Point-to-Point > VOA Band-by-Band) code is completely rewritten. Get interactive short/long-path overviews, day/night visualizations for TX/RX/midpoint (15th day of month), and detailed band-specific predictions. voacap.com/hf/

#VOACAP DX Charts are updated for the FP5KE DXpedition to St Pierre & Miquelon (Sep 15-26, 2025). The F6KOP radio club's 16 operators will be on all bands/modes. A special site offers detailed predictions and sunrise/sunset times to aid in low-band forecasting at voacap.com/dx/fp5ke/

New ham radio PHP scripts! Calculate distance/bearing (Haversine & Vincenty), Maidenhead grid locators, and sun times (sunrise, sunset, etc.). Check them out! github.com/OH6BG/hamPHP/

Dave Straube's (N7LKL) SOTA Weatherbot is now upgraded with VOACAP propagation predictions tailored to your specific summit and date. You'll receive a chart showing the best CW and SSB band openings using QRP to help plan your activation. For more info, please go to sotaweatherbot.wordpress.com.

VOACAP DX Charts (voacap.com/dx/) have been updated with predictions for the upcoming PY0S St. Peter & St. Paul Rocks DXpedition (Oct/Nov 2025). A full-featured service, with detailed analysis and precise sunrise/sunset times, will be made available as soon as the team announces their exact dates.

#VOACAP DX Charts Update! New azimuthal equidistant maps show bearing & distance to selected DXpeditions (under "VOACAP Prediction Site"), centered on YOUR QTH! The maps are interactive & downloadable as PNG. Check it out: voacap.com/dx/

Heads up, DX community! An update regarding #VOACAP DX Charts: 3G0XQ from San Ambrosio (San Félix) is scheduled for October/November 2025. This is a rare entity. A dedicated propagation prediction site will be available closer to the DXpedition. Good DX!

Ready to conquer airwaves & DX stations? My CCF/OHDXF presentation unlocks #VOACAP secrets: decipher Signal Power distributions, leverage MUFday values & tap into its best services. PLUS, harness ClubLog's smart QSO-based predictions! The PDF is here: www.voacap.com/2023/documen...

Added 9U1RU Burundi (Oct 29 - Nov 19, 2025) to the #VOACAP DX Charts! voacap.com/dx/ Good DX!

New DXpedition charts added to the #VOACAP DX Charts! Mark your calendars for these upcoming activations: 🛰️ KH7AL/KH9 Wake Isl (May 2025) 🏝️ VU7T Lakshadweep (May 22-28, 2025) 🌍 3C2MD Equatorial Guinea (Oct 30 - Nov 10, 2025) Plan your contacts at voacap.com/dx . Good DX!

Update on #VOACAP DX Charts at voacap.com/dx/: V6D Micronesia from Sep 22 - Oct 6, 2025! Get top-notch VOACAP & ITURHFProp propagation predictions & precise sunrise/sunset times at this tailor-made site: voacap.com/dx/v6d/. NOTE! ZS8W Marion predictions at voacap.com/dx/zs8w/ !

#VOACAP DX Charts Update - voacap.com/dx/ : 📍 Z68YL & Z68OM – Kosovo (May 20–30, 2025) 📍 OY6FRA & Team – Faroe Islands (June 1–11, 2025) 📍 PJ6Y – Saba (Oct 17–29, 2025) The two first have a dedicated prediction site with: ✅ VOACAP + ITURHFProp predictions ✅ Detailed sunrise/sunset times Good DX!

Ready for Marion Island?! Just launched a full HF propagation site for the ZS8W DXpedition (Apr 21–May 16, 2025)! Includes VOACAP + ITURHFProp predictions & detailed sunrise/sunset times. Plan your best shot at this rare one! www.voacap.com/dx/zs8w/ ... Good DX! 🎤🎧

DX Summit Update at dxsummit.fi! HF propagation predictions now powered by ITURHFProp via #VOACAP Online, showing Basic Circuit Reliability for hopefully more accurate results — especially on low bands and on long-path circuits. Give it a try and see the difference!

1/2 -- Exciting update on #VOACAP Online! Now featuring two Propagation Wheels: CAP Wheel (VOACAP’s REL value) & ITUR Wheel (ITURHFProp’s BCR value). Both measure circuit reliability but use different methods—compare them for better low-band predictions from ITURHFProp! Try it now: voacap.com/hf/

New VOACAP Online User's Manual (March 25, 2025) is out! Refresh your browser for the latest version. Chapters now classified by main menus + all antenna take-off angle graphs added. Check it out! www.voacap.com/2023/documen...

Exciting news at VOACAP Online, voacap.com/hf/! The ITURHFProp (P.533) prediction engine from the ITU is now fully integrated into the platform! Compare its results with VOACAP’s to gain deeper insights into HF propagation. Happy exploring!

Time for the summary sheet for vertical antennas at #VOACAP Online! Ground quality matters—seawater boosts the take-off angles & gain of the verticals. Horizontal antennas (Yagis/dipoles) see little benefit. This sheet shows take-off angles only, not gain. Patterns can’t be compared for gain.

Struggling to see the take-off angle patterns of antennas in #VOACAP Online? I’ve made contact sheets of take-off angles for all Yagi & dipole antennas at various heights across all ham radio bands! These should give a clearer overview of their behavior. More to come—happy exploring! 5 m or 17 ft.

... and still another quick #VOACAP DX Charts update at voacap.com/dx/: ✔ PJ7AA St Maarten, Mar 9 - Apr 5, 2025 ✔ 8R1TM Guyana, Mar 11 - Apr 26, 2025 ✔ TO1Q Guadeloupe, Mar 24 - Apr 7, 2025 ✔ PJ7UK St Maarten, Nov 28 - Dec 7, 2025 Good DX!

Another quick #VOACAP DX Charts update at voacap.com/dx/: ✔ 6Y7EI Jamaica, Mar 13-24, 2025 plus their special site at voacap.com/dx/6y7ei/ ✔ 3B9DJ Rodrigues Isl, Mar 24 - Apr 5, 2025 Good DX!

Update on #VOACAP DX Charts (voacap.com/dx): Added TX7XG French Polynesia (Fakarava Atoll, OC-066), April 8-16, 2025. Also made small UI refinements. Happy DXing! 🎧

I've updated the User's Manual for #VOACAP Online for Ham Radio (voacap.com/hf/)! Check it out at www.voacap.com/2023/documen... – now with fresh screenshots reflecting recent UI changes. Plus, I cover the brand-new Sun of the Day function! Happy DXing!

New at #VOACAP Online for Ham Radio! Sun of the Day – a visual breakdown of sun phases for any given day. 🌅 DAWN/DUSK = 6° below horizon ☀️ POST/PRE = 6° above horizon 🌌 NADIR = celestial midnight Still working on improving polar area accuracy! Check it out: voacap.com/hf/ under Point-to-Point menu.

#VOACAP Online for Ham Radio got a major revamp! Now, all those buttons that used to be below the world map are neatly organized in top-page menus—making navigation smoother and way more user-friendly, especially on mobile devices! Check it out at voacap.com/hf/ and let me know what you think!

Update on all #VOACAP Online HF propagation prediction services (voacap.com): I’ve added a new feature to the TX and RX antenna setups—now, you can simply click any radio button to set the selected antenna for all bands at once. Happy DXing!

New update for all #VOACAP Online HF propagation prediction services! Now you can quickly reset the grayline terminator to the current date & time—just click the time area in front of the slider. Simple, fast, and effective! Try it out e.g. at voacap.com/hf/. Happy DXing! 🎧

Update on #VOACAP Online (voacap.com): I fixed a long-standing CSS bug that hid the Close buttons on all left-side sidebar windows. These buttons have been there since Day 1 but were invisible due to the issue. This fix is especially useful for mobile users, making navigation smoother. Happy DXing!

Update on #VOACAP Online for Ham Radio (voacap.com/hf/): Refactored how user-set inputs (TX/RX QTH, TX mode & power, TX/RX antennas) are stored in your browser. To apply the update: 1️⃣ Force-refresh (CTRL+F5) to load the new code. 2️⃣ Remove old stored values. 3️⃣ Re-save your settings. Happy DXing! 🎙️

Fined-tuned the color bar of the Signal Strength coverage area maps on VOACAP Online (voacap.com/hf/), replacing the dBW values with approximate S-meter readings. This should help give a better idea of signal strength levels.

Update on #VOACAP Online (voacap.com/hf/)! The evaluation of the top 3 frequency bands per hour has been revamped. Now showing more prediction details for all three frequencies—giving you the data you need to make the best choice. 🔍 Click the green "Best FREQ" under the map.

Check out this incredible video of the 9L5A (Sierra Leone) DXpedition! Watch here: youtu.be/ytD9gPsLpyc Had the privilege of offering VOACAP propagation prediction support! Planning a DXpedition? Let’s connect! I’d be happy to assist with VOACAP predictions to help you maximize your contacts.

The VOACAP DX Charts have been updated to include the latest DXpeditions: SV1GA/A (Mt Athos) and 5N9DTG (Nigeria)! Plan your next contact with ease at voacap.com/dx/ . Happy DXing! 🎙️🌐