OH6BG
@voacap.com
VOACAP (Voice of America Coverage Analysis Program) is free professional HF Propagation Prediction and Ionospheric Communications Analysis software.
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.
November 22, 2025 at 6:45 PM
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.
November 20, 2025 at 8:24 PM
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.
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...
- 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...
October 16, 2025 at 7:05 PM
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...
- 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...
October 15, 2025 at 6:33 PM
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 😀
October 14, 2025 at 4:46 PM
...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-...
October 13, 2025 at 7:25 PM
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.
October 5, 2025 at 5:39 PM
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)
* 5K0UA – San Andres Island (Oct 20–30, 2025)
* FW5K – Wallis and Futuna (Oct 20 – Nov 7, 2025)
October 4, 2025 at 7:13 PM
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)
* 5K0UA – San Andres Island (Oct 20–30, 2025)
* FW5K – Wallis and Futuna (Oct 20 – Nov 7, 2025)
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/
- 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/
September 25, 2025 at 4:48 PM
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/
- 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/
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!
August 16, 2025 at 8:28 AM
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!
August 14, 2025 at 7:38 PM
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/
August 12, 2025 at 8:17 PM
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!
August 9, 2025 at 6:19 PM
#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/
August 7, 2025 at 6:24 PM
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/
August 5, 2025 at 6:57 PM
#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/
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.
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.
June 30, 2025 at 6:18 PM
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.
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.
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.
June 3, 2025 at 2:38 PM
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.
#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/
Check it out: voacap.com/dx/
June 2, 2025 at 7:01 PM
#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/
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!
This is a rare entity. A dedicated propagation prediction site will be available closer to the DXpedition.
Good DX!
May 18, 2025 at 7:09 PM
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!
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...
May 11, 2025 at 5:51 PM
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...
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!
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!
May 8, 2025 at 6:36 PM
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!
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/ !
April 29, 2025 at 4:23 PM
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!
📍 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!
April 21, 2025 at 6:42 PM
#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!
📍 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! 🎤🎧
April 17, 2025 at 4:29 PM
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!
Give it a try and see the difference!
April 15, 2025 at 6:21 PM
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!
Give it a try and see the difference!