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Thanks to everyone. Interesting comments about amplifiers not necessary for my area (very, very close to Philadelphia). I'll give up on trying different amps from this point on. That seems to explain why my problem seemed to get worse with the amplifier attached.
By the way all other channels (mostly VHF) come in fantastic just about 100% in quality all the time. As far as signal strength and intensity for these 2 nearby Philadelphia UHF channels (Fox and MyPhl) for some reason at times the intensity & quality are at 100 % and everything is ok. But when I get a lot of pixellation the signal intensity and quality drift all over from ~70% on down - and, of course, when I get 'bad signal' the intensity and quality both dip to 0. Why such discrepancies ? I know that my nearby neighbor is a local fireman and many times I hear a radio "scanner". Should I run a test with him to see if my problem only occurs when he runs the scanner ?
In any case, to answer Teleview's questions some more, there are 3 TVs thru the house connected to this antenna, via splitters with no other computer or radio equipment "stacked". All connections appear to be solid -again all the VHF stations are solid reception, it's just these few UHF stations (Ch.17 & 29) that all too frequently (like, when trying to watch the Phillies) that they pixellate like mad and drop the signal altogether for a few seconds. It's this inconsistency that drives me mad and makes me think holds the key.
Thanks for any additional tips you may have ?
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