I have been having a strange problem since I installed my CM 7777. I have a Samsung 151 and CM 3021 antenna. Since installing the preamp, I do get more stations and the signal level on each is quite high. What I am noticing is that on at least 2 of my stations, it takes a long time to lock on. Once it does, it's stable. I haven'tried it without the amp yet but I'm wondering if that is causing the problem. I know I need the amp to receive certain stations but am I over powering more "local" stations? Would too much power cause this delay when locking on?