I have installed a Winegard HD 7695P (it is about the same size as my old antenna) as a replacement antenna. I even installed a grounding rod for it. Anyway, it seems to have improved reception all around. No more pixelation on any of the stations so far.
It is interesting that the built-in signal meters on the TVs really don't show any drastic improvement in strength even though the reception is noticeably improved. GUM or JCandle indicated earlier in the thread that the meters are not really calibrated to anything; so, the absolute values don't have a lot of meaning. Perhaps there was also something else at play here besides signal strength. In any case, I am satisfied with the result. Thanks for the many recommendations.
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