Ready for VHF & UHF DXing?

摘要

Have you noticed how there are those amateurs who always seem to be around when the bands start to buzz? You may be one of them, but if you're not, read on! There are a bewildering variety of propagation modes, and all seem to come with their own collection of folklore and operator wisdom. There are three popular methods of working DX on VHF and UHF. These are via Tropospheric Propagation (Tropo) and Sporadic E layer ionization (Es), which occur at very different altitudes, and through totally different causes (see Fig 1), and Aurora (Au).