FM radio reception on shortwave bands
I noticed a rather odd phenomenon while exploring the upper end of the shortwave band. For the most part that area is quiet, except for a small section from about 17-20mc. Tuning this range brings in a number of faint, garbled radio stations. At first I thought I was listening to the AM band, until I was able to make out someone announcing the station frequency and call sign. By comparing what I was hearing to an FM radio, I verified that I was indeed picking up the FM band.
Any idea what's going on here? How is this even possible? Something malfunctioning perhaps?
Thanks,
Tim
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