Living in Austin, TX, I have been limited to NBC OTA programming. Talking to one of the HD people from TW cable, he mentioned that in his discussions with our local CBS affiliate that they have no intention of broadcasting HD until required by law. As a result, I had set out to try and receive the CBS HD broadcast out of Waco, TX. (65 miles away through thick trees and several other 2 story homes). After unsuccessfully trying the local Radio-Shack combo UHF/VHF antennea, I tried a Channel Master 4248 (~80" of dedicated UHF) + a Channel Master 7777 preamp. I am getting a signal consistently in the high 80's with the antennea in the attic!