18 MHz behaves like 20 meters with better manners. It opens a little later in the morning, closes a little earlier at night, and in between it does most of what 20 does — but with a fraction of the crowd.
18 MHz behaves like 20 meters with better manners. It opens a little later in the morning, closes a little earlier at night, and in between it does most of what 20 does — but with a fraction of the crowd.
It is a WARC band: no contesting allowed. That single rule is why 17 has a reputation as the friendliest band on HF. On a contest weekend it is often the only civil place left.
It is also forgiving of a modest antenna. A simple dipole on 17 gets out far better than the same effort on 40, because the wavelength is short enough that a normal backyard can actually support a real antenna at a useful height.
| FREQUENCY (MHz) | MODE | LICENSE CLASS |
|---|---|---|
| 18.068–18.110 | CW / RTTY / data | General, Advanced, Extra |
| 18.110–18.168 | Voice / image | General, Advanced, Extra |