i have been trying for a month now to get nbc,cbs out of desmoines iowa.im at 52567.i found that the trees directly behind my house was the culprit of our bad signal.before i moved the antenna i was getting 99 signals at night, but in daytime it went from 40-85.i was going to go higher wherei was at, but decided to try a side pole mount just above the roofline.there is a small clearing toward the broadcast towere.there was a major bonus in that we also got fox outof desmoines as well.our local foxis not hd, so this was awseome news as well.i used all winegard eqiupment.th eantenna is the 8200p, and the amp is the ap-8780.right now i have over 200 ft rg6 cable hooked up.i thought i was gettin comfortable on the roof, but working on the edge feels down right scary.