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DX is amateur radio shorthand for "distance" — making contacts with stations in far-away countries or rare locations. DXing is one of the most popular and enduring activities in the hobby. The thrill of hearing a weak signal from the other side of the world, calling through a pileup, and adding a new country to your log keeps operators coming back to the bands year after year.
The definition of DX depends on context. For HF operators in Europe or North America, DX generally means contacting stations outside their own continent. On VHF/UHF, where normal range is limited to local distances, even a contact of a few hundred kilometres can be considered DX.
For the purposes of awards like DXCC, the world is divided into "entities" (roughly corresponding to countries and territories). There are currently around 340 DXCC entities, and working as many as possible is the goal of many DXers.
While DX contacts are possible on any HF band, some bands are particularly important:
20 metres (14 MHz) — The workhorse DX band. Open to long-distance communication for much of the day, even during periods of low solar activity. If you can only monitor one band, this is the one.
17 metres (18 MHz) — Less crowded than 20 metres and often open when 20 is. A good band for DX with a more relaxed pace (no contests are held on the WARC bands).
15 metres (21 MHz) — Excellent for DX during moderate to high solar activity. During solar maximum, it provides strong worldwide signals.
10 metres (28 MHz) — Spectacular during solar maximum, with strong signals and small antennas working well. Can seem dead during solar minimum.
12 metres (24 MHz) — Another WARC band with good DX potential and less crowding.
40 metres (7 MHz) — Opens for DX at night and into the morning hours. Increasingly popular for DX contacts.
80 metres (3.5 MHz) and 160 metres (1.8 MHz) — DX is possible but more challenging due to higher noise levels and the large antennas needed. Working DX on these "low bands" is considered a significant achievement.
DX clusters are real-time networks where operators report (or "spot") DX stations they are hearing. When someone hears a rare station on a frequency, they post a spot that is instantly visible to thousands of operators worldwide.
Popular DX cluster access methods:
DX clusters are an invaluable tool for finding DX, but they also create instant pileups. When a rare station is spotted, dozens or hundreds of operators may appear on the frequency within minutes.
A pileup occurs when many stations try to call a DX station at the same time. Working through a pileup requires skill, patience, and good operating practices.
Listen first. Spend time understanding the DX station's operating pattern. Are they working simplex or split? How fast are they working stations? What information are they exchanging?
Know the exchange. Have your callsign ready and know what information the DX station is requesting (usually just a callsign and signal report).
Timing is everything. Listen for the moment the DX station finishes a contact and calls for the next one. Transmit your callsign at exactly that moment — not before, not after.
Give your full callsign once. Do not send your callsign multiple times in a row. One clear transmission of your complete callsign is more effective than a rushed repetition.
Listen for partial calls. If the DX station responds with a partial callsign (e.g., "the station ending in Alpha Lima Lima"), only respond if that matches your call. Responding when it is not your call wastes everyone's time.
Do not call on the DX station's frequency. If the station is operating split (see below), transmit on their listening frequency, not where they are transmitting.
Be patient. Large pileups can take many attempts. Persistence and good timing are more effective than raw power.
Rare DX stations almost always operate split — transmitting on one frequency and listening on another (or across a range of frequencies). This prevents the pileup from covering up the DX station's signal.
When you hear a station say "listening up 5 to 10" or "up 5," they are listening 5 to 10 kHz above their transmit frequency. Your radio needs to be set to transmit on one VFO and receive on another.
To work split:
A common mistake is to spread your calls across the entire listening range. Better operators listen to where the DX station is actually responding and focus their calls there.
A DXpedition is a trip to a rare or hard-to-reach location specifically for the purpose of making amateur radio contacts. DXpeditions activate entities that have few or no resident amateur operators, such as remote islands, disputed territories, or uninhabited locations.
DXpeditions range from a single operator with a portable radio to major expeditions involving teams of operators, multiple stations, generators, and large antenna systems shipped to remote locations. Major DXpeditions are planned months or years in advance and may make tens of thousands of contacts during their time on the air.
Information about upcoming and active DXpeditions is published on websites, DX bulletins, and social media. The DX calendar helps operators plan ahead and know when to look for rare entities.
DXing has a well-established system of awards that provide goals and recognition:
You do not need a massive station to work DX — many operators work over 100 countries with 100 watts and a wire antenna. However, a well-equipped DX station can make the difference when chasing rare entities through pileups:
Transceiver — A modern HF transceiver with good receiver performance (strong signal handling, narrow filters, DSP) is important for pulling signals out of crowded pileups.
Antennas — Antenna improvements yield the biggest returns. A directional antenna (such as a Yagi or hex beam) allows you to focus your signal and reception toward the target. Even a modest tri-band Yagi at 10–15 metres (30–50 feet) height is a significant upgrade over a dipole.
Power — The legal maximum power varies by country (1500 watts in the US, 400 watts in the UK, etc.). More power helps in pileups, but antenna improvements are generally more cost-effective than adding an amplifier.
Low-band antennas — If you want to chase DX on 80 and 160 metres, dedicated low-band antennas (such as verticals with ground radial systems, Beverage receiving antennas, or large loops) become important.
The DX community has developed a strong set of operating norms: