Amateur radio frequency allocation is done by national telecommunication authorities. Globally International agreements assign amateur radio bands which differ by region. . audio transmission modes (FM) and very fast data transmission modes that are unfeasible for the kilohertz-wide allocations in the HF bands.
An overview or summary about the HF ham bands or amateur radio frequencies, the frequency allocations and their properties.
HF bands. The HF bands are by far the most popular bands in the amateur service. Local contacts and world-wide propagation are all possible at almost anytime.