You'd be surprised at how much interference many of these translator signals can cause, especially when they get authorized on the same freq as a full power signal, but right over the line of the original station's secondary contour. Hills and terrain, as you have in Warren County and the Miami Valley, can make even a 70w signal go a lot further than what you see mapped on a flat piece of paper. Now put up a 250w translator at 400 feet or higher, and you've got something to notice! (Cincinnati had at least one or two of those, or it did when I was in the area a few years ago.)
A station I worked at not long ago in the area got covered up and lost its Cincinnati coverage just beyond its secondary countour in mid-Warren County. What doesn't get discussed is the amount of hiss and signal beating that occurs beyond the audible range of a translator, or any other co-channel allocation squeezed in tight to another signal. It adds a lot of flutter when driving where there used to be only a little multipath on a signal. And the temperature inversion days you get in summer will do havoc to signals, if you're anywhere near the edge of even the primary contour. It's making a lot of the FM band for motorists as much fun as nighttime AM listening now. Good luck keeping many of your favorites intereference-free now as you drive between metro Cincy and Dayton-Springfield.
