I using 2 Channel 7-69 yagi antennas. I do not want to use a rotor. One is pointing 126*, the other 296*. The masts are 20' apart at the same elevation. I coupled them with a CC-7870 to 1 HDTV. I could then receive most of my target OTA transmitters. They are 4.1, 5.1, 11.1, 17.1, 20.1, 22.1, 28.1, 30.1, 47.1, & 50.1. But some days the signal levels would go up and down on stations (4.1 & 30.1) that normally average 5 out of 10 bars on my (built in) TV signal strength meter and sometimes 30.1 goes away completely. After understanding the facts about the losses associated with the CC-7870 I surmised (SWAG) that my signal fluctuations were due to the coupler loss. In an attempt to make up for the CC-7870 loss I installed a AP-8700. Bad idea. Now I can't lock onto any signals, constant breakup. So now I'm thinking that maybe the signal is too strong. Then I thought that it might be a good idea to ask someone who knows more about this that I do. So I've attached a TVFOOL report. I'm hoping that maybe a HDP-269 will solve my problems. I don't understand why a solid 8 out of 10 signal will at times yo-yo up and down during a bright sunny day and at night not budge from the 8 mark. So TIA for any advice / suggestions.