Explore HF propagation like a pro! Rob Wagner VK3BVW shares another great VOACAP Online video, this time showing how to create professional‑grade coverage maps for SWLs. A must‑watch for anyone curious about where and why signals travel. www.youtube.com/watch?v=foA2...
Hi Dave, the link to the VOACAP DX Charts is the first item under the "Help" menu...
NEWS FLASH! Rob VK3BVW has released an excellent video guide to VOACAP Online for SWL — a free propagation prediction tool for shortwave listeners. Even better, ham radio operators will find that the same concepts translate directly to the Ham Radio version!
www.youtube.com/watch?v=C4Xb...
UPDATE on VOACAP Online for Ham Radio, voacap.com/hf/: A long‑standing Safari‑only UI bug on macOS has been fixed. Selecting a value from the station power drop‑down no longer causes the map to drag when moving the cursor away.
Update to #VOACAP DX Charts at voacap.com/dx
Several exciting DXpeditions have been added:
• KP5/NP3VI Desecheo — Jan 12/14 to mid‑Feb 2026
• VP2E Anguilla — Mar 3–20, 2026
• TX9W Marquesas — Apr 19–30, 2026
• ZK3 Tokelau — Nov 2026
Good DX!
Updates on #VOACAP DX Charts at voacap.com/dx/
🌍 LZ0A South Shetlands Islands | January 2026
❄️ 3G9S Chilean Antarctic | Jan 10-17, 2026
🌴 V6HUCHIDA Micronesia | Jan 22-28, 2026
VOACAP DX Charts - Helping DXpeditions succeed, helping amateurs connect.
Happy Holidays everyone & Good DX!
New: a lightweight HTML tool to convert EiBi shortwave schedules into rich KiwiSDR DX labels. Download eibi2kiwi.html + eibisites.csv from github.com/OH6BG/eibi2k..., and the latest EiBi CSV from www.eibispace.de. Ideal for HF BC listeners. Runs fully in your browser. Python version available, too.
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.
Yes, I think so. Many references knew of this behavior.
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...
...and a new version available 😀
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!
I tried to reduce the size of the tables, I hope now ok
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!
Use the new interactive short/long-path tables by hovering over any cell to instantly view hour, band, Reliability (R), Signal Strength (S), and MUFday (M) data. This provides at-a-glance insights for propagation predictions.
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/
