The 17 meter band is similar to the 20 meter band in many respects, but the effects of fluctuating solar activity on F2 propagation are more pronounced.
During the years of high solar activity, 17 meters is reliable for daytime and early-evening long-range communication, often lasting well after sunset.
During moderate years, the band may open only during sunlight hours and close shortly after sunset.
At solar minimum, 17 meters will open to middle and equatorial latitudes, but only for short periods during midday on north-south paths.
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