WSPR BAND SELECTION GUIDE
Choosing the Right Band for Your Station
W2MMD · GCARC WSPR Network · Spring 2026
The TAPR Universal WSPR HAT is available for every major HF band from 160 meters through 6 meters, each kit priced at $32. Because the low-pass filter components you solder determine the operating band, each board is dedicated to one band. Choosing the right band for your situation is one of the most important decisions in getting started.
Every band produces useful propagation data, and every station that joins the network — on any band — strengthens the club’s collective picture of HF conditions from the FM29 grid area.
★ The most important rule: start with the band you already have an antenna for. A modest dipole already in the air will outperform a brand-new antenna that isn’t built yet. If you have a 40m dipole, start on 40m. If you have a multiband vertical, pick whatever band interests you most. The best WSPR beacon is one that is actually on the air.
If you have antennas for multiple bands, use the guide below to choose based on your propagation interests. If you have no existing HF antenna, 30 meters is the recommended starting point for General licensees. Technician licensees must use 10 meters.
📅 Antenna sessions coming this summer: We will be running Saturday presentations and a hands-on antenna-building session covering the most popular WSPR antenna designs — dipoles, inverted-V, end-fed half-wave, and random wire configurations. See the #wspr-project Discord channel for dates.
The “top band” — the lowest amateur HF allocation. A challenging but rewarding WSPR band for those who can accommodate the antenna.
✓ Advantages
- Exceptional nighttime NVIS coverage — solid regional contacts out to 500–1,000 miles
- Rare but spectacular DX openings at night, especially in winter
- Very low competition — few WSPR stations on this band
- Interesting scientific data on low-frequency ionospheric behavior
△ Disadvantages
- Antenna is enormous — a half-wave dipole is approximately 256 feet end-to-end
- No DX during daytime hours — the D-layer absorbs all signals
- Requires a very good ground system for verticals
- High local noise floor in residential areas
- Sparse receive network worldwide — fewer stations to hear you
A workhorse band for regional nighttime propagation. Excellent for monitoring NVIS performance and short-path DX on winter nights.
✓ Advantages
- Strong, reliable NVIS coverage out to ~1,500 miles after dark
- Transcontinental and sometimes transoceanic DX on winter nights
- Good receive network — many active WSPR stations
- Manageable antenna size compared to 160m
- Very stable, predictable propagation patterns
△ Disadvantages
- Shuts down for DX during daytime hours — D-layer absorption
- Dipole is still large: ~66 ft each leg
- High man-made noise on the band in suburban/urban areas
- Limited intercontinental DX compared to the higher bands
The most versatile of the low bands — useful both day and night, with reliable regional coverage around the clock and good DX after dark.
✓ Advantages
- Useful propagation both day and night — 24-hour data
- Reliable regional coverage (500–2,000 miles) at all times
- Strong transoceanic DX on winter nights
- Very large and active WSPR receive network worldwide
- If you already have a 40m antenna for operating, you’re ready to go
△ Disadvantages
- Crowded band — heavy SSB and digital activity; WSPR sub-band is protected but QRN can be high
- Dipole is still substantial: ~33 ft each leg
- Daytime DX limited — mainly regional skip during daylight hours
The community’s recommended starting band for WSPR — active around the clock, contest-free, and supported by the largest global receive network of any HF band. If you have no existing HF antenna, build one for 30m.
✓ Advantages
- Propagation reliable 24 hours a day — NVIS by day, DX by night
- WARC band: no contest QRM, ever — ideal for unattended beacons
- Largest and most active WSPR receive network of any HF band
- Manageable antenna — a dipole is only ~23 ft each leg (~46 ft total)
- Excellent mix of regional and intercontinental propagation
- Transcontinental and transatlantic paths routine on most nights
△ Disadvantages
- General license required — Technicians cannot operate here
- Narrow band allocation — only 50 kHz wide; can feel crowded
- Daytime DX limited vs. 20m — shorter skip distance during daylight hours
A quiet, contest-free DX band with excellent daytime propagation near solar maximum. Think of it as 20m without the crowds.
✓ Advantages
- Outstanding daytime DX propagation near solar maximum (we’re there now)
- WARC band — no contest QRM, quieter than 20m and 15m
- Small antenna — dipole is only ~13 ft each leg
- Excellent for comparing daytime propagation vs. 20m from the same location
△ Disadvantages
- General license required
- Limited nighttime propagation — band typically closes after dark
- Smaller WSPR receive network than 20m or 30m
- Propagation can be inconsistent during solar minimum years
A solar-cycle-dependent band that can be spectacular near solar maximum — and largely dead otherwise. With Solar Cycle 25 peaking now, this is a good time to try it.
✓ Advantages
- Spectacular worldwide DX when the band is open near solar maximum
- WARC band — no contest QRM
- Very small antenna — dipole is only ~10 ft each leg
- Interesting for tracking solar cycle effects on upper HF propagation
△ Disadvantages
- General license required
- Very limited propagation during solar minimum years
- Daytime only when open — closes at night even at solar maximum
- Small WSPR receive network on this band
The classic DX band — the most active HF band in amateur radio and an excellent choice if you already have a 20m antenna. Best for daytime long-path DX research.
✓ Advantages
- Outstanding daytime DX — worldwide paths routinely open during daylight
- Second-largest WSPR receive network after 30m
- If you already have a 20m antenna, you’re ready to go
- Manageable antenna: ~16 ft each leg
- Excellent for gray-line propagation research at sunrise and sunset
△ Disadvantages
- General license required
- Band typically closes at night — limited nighttime data compared to 30m or 40m
- Not a WARC band — contest weekends produce elevated noise levels
- Very crowded — busiest HF band; more QRM potential than WARC bands
A solar-active band delivering impressive DX near solar maximum with a compact antenna. Currently producing excellent propagation as Solar Cycle 25 peaks.
✓ Advantages
- Excellent worldwide DX near solar maximum — which is right now
- Compact antenna: ~11 ft each leg
- Good F2 propagation to Europe and South America during daylight
- Strong WSPR receive network during active solar conditions
△ Disadvantages
- General license required
- Largely dead during solar minimum — plan ahead for the long term
- Daytime-only band — limited or no propagation after dark
- Not a WARC band — contest QRM on weekends
The recommended band for Technician licensees — and currently one of the most exciting WSPR bands for everyone. Near the peak of Solar Cycle 25, 10m is producing remarkable worldwide DX on a daily basis.
✓ Advantages
- Open to Technician licensees — full digital privileges at 28 MHz
- Smallest HF antenna of any band: ~8 ft each leg (~17 ft total dipole)
- Extraordinary worldwide DX right now at solar maximum
- When open, a single 200 mW transmission can be heard on every continent
- Excellent for tracking F2 propagation and sporadic-E openings
- Not a WARC band but 10m WSPR sub-band is relatively quiet
△ Disadvantages
- Highly solar-cycle dependent — poor to unusable during solar minimum
- Daytime-only F2 propagation — closes at night except for sporadic-E
- Band can be completely dead for days during geomagnetic storms
- WSPR receive network shrinks significantly during quiet periods
The “Magic Band” — 6m is unique in amateur radio for its unpredictable but spectacular propagation modes. A WSPR beacon here contributes data on sporadic-E, F2, meteor scatter, and aurora that no other instrument captures as cleanly.
✓ Advantages
- Open to Technician licensees
- Sporadic-E openings produce sudden, intense DX several times per summer
- F2 propagation possible near solar maximum — worldwide paths
- Very small antenna: ~4.5 ft each leg
- Scientifically interesting — captures rare propagation events other bands miss
- Less crowded WSPR sub-band than HF bands
△ Disadvantages
- Highly unpredictable — can be completely dead for weeks at a time
- Not a good “daily driver” for steady propagation data
- Smaller WSPR receive network than HF bands
- Most spots will be local or regional when the band is not open
📅 Antenna Sessions — Summer 2026
Not sure which band is right for your antenna situation? We will be running a series of Saturday sessions this summer dedicated to antenna selection and construction for WSPR, covering the most popular designs for each band: half-wave dipoles, inverted-V, end-fed half-wave (EFHW), and random wire configurations.
A hands-on antenna-building session will give members the opportunity to construct and immediately test a working antenna. Watch the Discord #wspr-project channel and the w2mmd.org club calendar for dates and details.