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W1TAG / WD2XES
Information on Low Frequency Propagation
LF experimenters learn quickly that a lot of factors are involved in being able to copy signals, particularly over long distances. Noise, both local and atmospheric, is very important, but the effects of the Sun upon the Earth's geomagnetic field will ultimately determine whether you can "get through" at a given time. What's good for HF propagation is generally bad at LF, but it's not that simple! These sites provide some data and techniques used in predicting LF propagation.