I'm in Temecula, which is about 77 miles from the Mt. Wilson towers that transmit all of the DT stations in the LA area. I installed a CM 4248 and a Winegard AP-4800 on top of my house and pointed it to 299°. Here's my problem. I'm getting EVERY LA DT station perfectly, except ABC. My signal strength meter on my Samsung SIR-TS160 reads between 77%-95% for all 13 DT stations, but nothing on ABC. Is it possible that I'm doing something wrong? Is it possible that I'm overloading my equipment with signal on ABC? Anybody have any similar problems or tips with fringe reception areas. I simply can't believe that I can receive every single DT station in my area except for a major network trasmitted from the same place. BTW, I receive KNBC-DT 4.1 at 100% and KCBS-DT 2.1 at 95%.