Unless you're close to the broadcast, antennas may not do you much good.. Once they all switched to digital broadcasts, it limited the range by about 50-60% of what you could get with analog..
I'm 30 miles from the Shoreview Towers where most of the Twin Cities broadcasts from and I can get those.. But the one I really want to get (CH-13 Eau Claire) is impossible now. It's about 50 miles east..