Thanks for the tips Jim. I think your right, terrain is an issue. What I don't understand is why does the 4228 not work as well as the RS vu-190 it replaced? The RS was able to intermittently get several HD channels the CM only gets 1 but it's pretty solid. The RS got several uhf channels not listed in the antennaweb report. The CM doesn't get them. It gets 1 HD and 1 unwatchable channel. The rest of the uhf channels are just snow. It's installed at the same height in the same spot with the same amplifier and cable that the RS was using.
I took down the CM yesterday and don't see any visible damage. I haven't tried a new balun yet but will give it a shot.
Everything I've read indicates the CM is about the best uhf antenna you can get but in my case it's uhf performance doesn't come close to that of the RS vu-190. The only things I can think of are either my anetnna is defective or there's something about the directionality of the vu-190 design that make that type of antenna the only choice. The other thing I don't understand is why, since it doesn't perform as well on the other uhf channels, does the CM work so well with the 1 uhf channel it does get?
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