DX Map HB9VQQ

Every experienced radio amateur knows that success on HF bands is not just about power and antennas, but primarily about proper timing. The tool DX Map by HB9VQQ (currently in version 5) represents a top-notch platform that transforms raw data from thousands of receivers into a clear visual map of propagation in real-time. Roland HB9VQQ actively researches propagation and supports the amateur radio community. For example, he hosts a server for RM-Noise.

If you want to know if 'America is open' or if it makes sense to turn on the radio on the 10-meter band, this tool is a must for you. You can find it at: DXmap.hb9vqq.ch/v5/.

Two worlds, one goal: WSPR and NCDXF

The power of the DX Map lies in the combination of two key data sources that update every 15 minutes:

• WSPR (Weak Signal PROpagation Reporter): A network of thousands of low-power beacons. It is ideal for assessing the overall condition of bands and discovering unconventional paths. It covers bands from 80m to 10m.

• NCDXF (International Beacon PROject): A system of 18 synchronized 100W beacons at strategic locations around the world. Since they transmit at a constant power, they are the best reference point for SSB (voice) operation.

Tip: If you are looking for digital connections, watch WSPR. If you are interested in making voice contacts, switch to NCDXF.

Decoding indices: What do the numbers say?

The DX Map uses not only colored lines but also sophisticated indices:

• DX Index (WSPR): It shows how current conditions differ from the typical state for that hour. The value 100 is normal, 120+ means excellent conditions.

• Band Score (NCDXF): Combines signal strength and the number of stations that hear the beacon. Score 30+ means a good, reliable path.

• Trend indicators: Arrows next to values are key. ↑ (improving), ↓ (deteriorating), ★ (newly opened path). Ideally, capture the start of the opening (upward trend).

SSB outlook: Can I reach out by phone?

One of the most useful features for 'phone operators' is SSB Outlook. Based on SNR (signal-to-noise ratio) and the number of skimmers estimates the chance of a voice connection:

• Strong: Excellent chance for SSB QSO.

• Moderate: Possible, but requires patience.

• Weak/Unlikely: Better try CW or digital modes.

Space weather under scrutiny

In the header of the map, you will find current solar indices that directly affect your radio:

• Kp Index: Magnetic activity. Values 0–2 are ideal. At 5+ (storm) expect degradation of paths through the poles.

• SFI (Solar Flux Index): A higher number (150+) means 'live' upper bands (10m–20m).

• DRAP (D-Region Absorption): Shows which frequencies are absorbed by solar radiation (critical for daytime operation).

Interactivity and history

The map is not static. You can use:

• Filters: Display only specific regions (e.g., EU-NA) or specific bands.

• History Playback: Using the controls at the bottom, you can replay the last 48 hours. It is fascinating to watch how the bands open and close depending on the 'Grayline' (dusk/dawn).

• Keyboard shortcuts:Space (Play/Pause), arrows ←/→ (step in time), F (full screen).

Practical tips for operators

DX Map by HB9VQQ is likely the most comprehensive free tool in 2026 for understanding what is currently happening in the ether. Before you start unnecessarily tuning into empty bands, check the map - your amateur radio 'eyes' will thank you.