I'm located in Los Altos Hills, about 50 miles south of Mt. Sutro. I don't have a clear line-of-sight to the Sutro tower, but am able to pick up ever channel from there with Quality numbers of 80% or better with one exception, Channel 5 which has a Quality reading of zero. The only time I can receive Channel 5 is when it is raining. Under just the right storm conditions I can get a 60% Quality reading, but as you can imagine it is very unstable. My UHF antenna is a Channel Master 4250, a 6 foot parabolic, and my current channel count is 86.
The strange thing is I was getting Channel 5 for years. I see their power hasn't changed so it appears they have changed there antenna. I was wondering if any forum members have had a similar experience. I have a feeling that putting in a higher gain antenna isn't going to help. Any ideas? Unfortunately several of the shows we like to watch are on Channel 5 this year.