Ham Radio General Class Practice Test

At what point in the solar cycle does the 20 meter band usually support worldwide propagation during daylight hours?

1. At the summer solstice

2. Only at the maximum point of the solar cycle

3. Only at the minimum point of the solar cycle

4. At any point in the solar cycle

The correct answer is: At any point in the solar cycle

The 20 meter band, which operates in the high-frequency range, can support worldwide propagation during daylight hours at various points in the solar cycle, not just single moments or conditions. While it is true that solar activity tends to influence the conditions of radio propagation, the band is capable of effective communication depending on factors such as ionospheric conditions, time of day, and seasonal variations. During the solar cycle, which lasts about 11 years, the amount of solar activity varies, influencing ionization levels in the atmosphere. Increased solar activity at the maximum of the cycle typically enhances propagation capabilities, but good propagation can still be achieved even during lower activity periods. Therefore, while optimal conditions often occur closer to solar maximum, the 20 meter band is versatile enough to support long-distance communications throughout the entire solar cycle, including times of lower solar activity. This flexibility is especially relevant for operators seeking to make contacts regardless of current solar conditions.