HF
Radio Propagation Primer by AE4RV (requires
Adobe Flash
Player)
Use this
Flash movie to learn how HF or "Short-wave" radio
works. Learn about the Ionosphere, Solar Flares, and why radio
waves skip or refract off of the different layers of the Ionosphere.
Learn how space weather affects radio conditions. This presentation
is useful for Ham radio operators, DX'ers and SWL's (shortwave
listeners).