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OH6BG

@voacap.com
308 followers 37 following 100 posts

VOACAP (Voice of America Coverage Analysis Program) is free professional HF Propagation Prediction and Ionospheric Communications Analysis software.

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OH6BG @voacap.com · 29/07/2026
VOACAP Online just added simple, one‑page planning views that make HF planning faster and more intuitive. Visit www.voacap.com/hf/ and choose Planner from the Point‑to‑Point menu. Suitable for contest & DXpedition strategy planning, or just for regular operating.
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OH6BG @voacap.com · 25/07/2026
VOACAP Online now supports two propagation engines for calculating coverage maps: VOACAP and ITURHFProp. This dual‑engine option is new so you can now compare two different models side by side. All map options, incl. longitudinal midpoint and multiple map projections, are available for both engines.
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OH6BG @voacap.com · 22/07/2026
Fresh update on VOACAP Online HF propagation prediction services: you can now choose your map projection for coverage maps — Cylindrical (default) or Azimuthal Equidistant. Try it now: voacap.com/hf/ See Radio New Zealand’s footprint at 0700 UTC on 9700 kHz, beaming 35° from Rangitaiki.
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OH6BG @voacap.com · 14/07/2026
A fresh update just landed on VOACAP Online for Ham Radio / Marine / SWL: you can now choose your longitudinal midpoint for coverage maps. Until today, every map was locked to 0°, but there’s now a 180° option - finally giving listeners in Australasia and Oceania seamless, wrap‑free coverage views.
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OH6BG @voacap.com · 03/04/2026
Easter update: #VOACAP DX Charts voacap.com/dx/ — 9T0MD DR Congo, Sep 30–Oct 11, 2026 New HF propagation site for ZK3 Tokelau DXpedition: VOACAP+ITURHFProp predictions, late‑November solar tables, VOACAP coverage maps. Good DX!
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OH6BG @voacap.com · 02/04/2026
Major update on #VOACAP DX Charts! Explore fresh propagation insights for these exciting 2026 DXpeditions: 📡 3B9N Rodrigues — Apr 2–May 22 🌍 3X3A Guinea — Apr 11–25 🏝️ 3D2JK Fiji — Apr 17–22 ⛰️ 3G0Z Juan Fernandez — May 🐘 C8K Mozambique — Nov 10–20 🔗 voacap.com/dx Good DX!
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OH6BG @voacap.com · 07/01/2026
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!
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OH6BG @voacap.com · 20/12/2025
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!
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OH6BG @voacap.com · 09/12/2025
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.
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OH6BG @voacap.com · 22/11/2025
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.
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OH6BG @voacap.com · 20/11/2025
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.
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OH6BG @voacap.com · 16/10/2025
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 · 15/10/2025
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...
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OH6BG @voacap.com · 14/10/2025
...and a new version available 😀
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OH6BG @voacap.com · 13/10/2025
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 · 05/10/2025
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 · 04/10/2025
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)
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OH6BG @voacap.com · 25/09/2025
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/
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OH6BG @voacap.com · 16/08/2025
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 · 14/08/2025
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 · 12/08/2025
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 · 09/08/2025
#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 · 07/08/2025
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 · 05/08/2025
#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/
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OH6BG @voacap.com · 30/06/2025
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 · 03/06/2025
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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OH6BG @voacap.com · 02/06/2025
#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/
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OH6BG @voacap.com · 18/05/2025
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!
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OH6BG @voacap.com · 11/05/2025
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...
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OH6BG @voacap.com · 08/05/2025
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!
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OH6BG @voacap.com · 29/04/2025
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/ !
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OH6BG @voacap.com · 21/04/2025
#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!
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OH6BG @voacap.com · 17/04/2025
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! 🎤🎧
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OH6BG @voacap.com · 15/04/2025
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!
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OH6BG @voacap.com · 29/03/2025
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/
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OH6BG @voacap.com · 22/03/2025
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!
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OH6BG @voacap.com · 12/03/2025
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.
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OH6BG @voacap.com · 11/03/2025
60 m or 198 ft.
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OH6BG @voacap.com · 11/03/2025
40 m or 132 ft.
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OH6BG @voacap.com · 11/03/2025
30 m or 99 ft.
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OH6BG @voacap.com · 11/03/2025
25 m or 82 ft.
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OH6BG @voacap.com · 11/03/2025
20 m or 66 ft.
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OH6BG @voacap.com · 11/03/2025
15 m or 50 ft.
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OH6BG @voacap.com · 11/03/2025
10 m or 33 ft.
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OH6BG @voacap.com · 11/03/2025
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.
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OH6BG @voacap.com · 08/03/2025
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! 🎧
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OH6BG @voacap.com · 02/03/2025
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!
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OH6BG @voacap.com · 01/03/2025
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.
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OH6BG @voacap.com · 26/02/2025
#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!
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OH6BG @voacap.com · 20/02/2025
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!
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