Since I am in Florida, there are no mountains for transmitters; however, I have a 120 element yagi in the attic (about 20 ft above ground level) and the house is on the high ground here, about 28 ft above sea level, so I can get Tampa/.St. Pete broadcast channels 40 miles away. Lost the url long ago, but there are web sites that will calculate line of site to published antenna heights of HDTV transmitters. Because they are digital, you either get reception or you don’t.
Thanks for the replies.
I need to continue researching and find some people in my area who’ve tried these new antennas. Of course, I’m in an area where everyone had outside antennas before cable and satellite became available. Those old antennas were much larger than these new, smaller ones.
I found some line of sight sites, but so far they require detailed information that I don’t have. My area is at about 1,100 feet elevation so that has always helped.