I love my PSR-500. I live in Knoxville, TN and was programming the THP for my area into my scanner. I got to the THP fixed relay section and tried to program 75.880 and 75.960 (Knoxville/Knox County). It wouldn't do it (I'm not even sure I would have heard anything even if it had, but I wanted to at least try). SO, I looked over the frequency specs for the scanner and saw that there is a coverage gap between 54 and 108 MHz. Why doesn't the scanner cover anything in that gap?