Do I need line-of-site to recieve HD OTA broadcasts? I want to put an antenna in my attic because my homeowner's association will not allow an antenna in the back yard or on the roof. Will this still pick up OTA HD channels? I do not have any tall buildings or trees as far as I can tell in the direction that I need to point the antenna. I do have the West Bend airport in the way though. Please let me know what I should do for this. I need to have HD in time for Packer's season.