So my 2 year old son woke up in the middle of the night last night (after 2am), which caused me to be awake and not be able to fall back asleep.
I decided to just head down to my radio desk for a little while. I switched the radio on and hit the scan button, not actually expecting to actually hear much at that hour. Within one cycle of scan it lands on Channel 15 and it's a full quieting conversation between two guys (about radio stuff). Channel 15 is .550 and we also have a very prominent repeater on Repeater .550. So I automatically think, "this is the Joliet .550". I tune over to where I actually have Joliet .550 with the appropriate tones and shift in case I might want to chime in. It's not there.. Signal bars are full scale, but it's not tone-opening the audio... Now I could tell that this conversation was being had via a repeater by the way the transmissions were tailing out. Well that makes no sense... I'm aware of all of the repeaters in my region, and there isn't another .550 repeater in range, and frankly it wouldn't be wise to put a new one there in this area because the existing one there is a monster.
Long story short, I listened for a while trying to identify a call but within a few more minutes it started just sort of fading out like you might hear some shortwave or AM radio station from far away do.
It was some sort of propagation anomaly, and I was hearing a very distant .550 repeater. I didn't know that this was possible at the UHF level!! No joke, at one point it sounded like my local machine, and then it faded away into nothing..
Has anyone else had this happen?