Author | Lightnews

OH6BG @voacap.com · 14d

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...

GitHub - OH6BG/VOACAP_MAPS: Scripts to run VOACAP P2P prediction matrix, plot maps and store to database

Scripts to run VOACAP P2P prediction matrix, plot maps and store to database - OH6BG/VOACAP_MAPS

github.com

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OH6BG @voacap.com · 15d

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...

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OH6BG @voacap.com · 16d

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...

OH6BG @voacap.com · 17d

...and a new version available 😀

OH6BG @voacap.com · 18d

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-...

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OH6BG @voacap.com · 26d

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.

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OH6BG @voacap.com · 27d

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)

OH6BG @voacap.com · Sep 27

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!

VOACAP: 5R8TT Madagascar

voacap.com

OH6BG @voacap.com · Sep 27

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!

VOACAP: 9L8MD Sierra Leone

voacap.com

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OH6BG @voacap.com · Sep 26

OK, it's now on voacap.com/dx/ list.

VOACAP DX Charts

voacap.com

OH6BG @voacap.com · Sep 25

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/

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OH6BG @voacap.com · Aug 20

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!

Making sure you're not a bot!

www.voacap.com

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OH6BG @voacap.com · Aug 16

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!

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OH6BG @voacap.com · Aug 14

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!

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OH6BG @voacap.com · Aug 13

I tried to reduce the size of the tables, I hope now ok

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OH6BG @voacap.com · Aug 12

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/

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OH6BG @voacap.com · Aug 9

#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!

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OH6BG @voacap.com · Aug 7

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.

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OH6BG @voacap.com · Aug 7

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/

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OH6BG @voacap.com · Aug 5

#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/

OH6BG @voacap.com · Jul 25

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/

GitHub - OH6BG/hamPHP: Various PHP scripts for amateur radio purposes

Various PHP scripts for amateur radio purposes. Contribute to OH6BG/hamPHP development by creating an account on GitHub.

github.com

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OH6BG @voacap.com · Jul 14

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.

SOTA Weatherbot

Automated summit weather forecasts for SOTA activators.

sotaweatherbot.wordpress.com

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OH6BG @voacap.com · Jun 30

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.

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OH6BG @voacap.com · Jun 27

Not a huge signal at 18 UTC on 13605 kHz on the West Coast of Finland, but still OK 🙂

OH6BG @voacap.com · Jun 3

It's under some of those special prediction sites such as V6D Micronesia. If you think that azimuthal equidistant maps would be useful on the proper VOACAP Online site, I can add it there as an option. The main world map cannot be changed to that projection at the moment.

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