Although I've only casually dabbled in FM DX and am nowhere near the FM specialists you folks are, I have spent a lot of time listening to 107.9 out here. Two towns NW of here some buddies had an LPFM on there for a while, and I'd help them out asbestos I could checking their clearer coverage and reach by put-putting around the region off the average radio in a 1992 Topaz. The actual coverage was, of course, nowhere NEAR that Euclidean circle assigned to it on its initial Radio-Locator map. The mountain blockages and lines-of-sight instead made for a corsetted bowtie pattern obediently hugging the arc of the alps. Up and down mountains and through passes of terrain and buttonhook turns (and in between the Harry James and Andrews Sisters songs the station insisted on playing) I did snatch bits of Curtis's Williamsport WOTH , the thing from Tobyhanna near the Poconos, WEBE 108 from CT once, and that Reading PA translator of the 107.5 Boyerstown PA station.
And SMH again on 'terrain' : On my way home after a coverage voyage there was the long Ashland Mountain between the car and the station. Total distance could not have been more than an air mile. But I was getting 'Too Late To Turn Back Now' and other Oldies from a station with ads for places on a HIghway 41. Since I know of know '41' in Pennsylvania, I stayed tuned. Then one ad the station ran gave locations in Bradenton and Sarasota. The Oldies station was WSRZ Sarasota FL. In fact, back at home with the GE SR 2, WSRZ had drifted off and there was a drifty Spanish station. I was thinking 'Key West', because 107.9had only that one listed as SS, but never got an ID.
When my station pals were informed, there were few groans from them. I tried to theorize that, quite often, Tropo amd ESkip can be recirprocal ; that confused people in Bradenton might've been hearing Perry Como and Ethel Merman on 107.9 for a while, but I was just told to go home and leave them alone.