Charlotte, NC - OTA - Page 291 - AVS Forum
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Originally Posted by ejb1980 View Post

I realize that that was a long post about out of market stations. But it goes to show that sometimes the location of a sweet spot is in a far-from-logical place.
My problem was caused by a mathematics error that I made in the derived impedance that I used to build the antenna. It was way off from 300 ohms. This is why rebuilt it by changing the length of the copper loop and electrically floating it. The mark II antena works fine in either location. The engineer in me doesn't like to rely on assumptions which is why I kept at it until I discovered what was causing my problem. i.e. Theory did not match tested results.

IMO strange unexplainable things & sweet spots are almost always caused by something real, but unknown. With antenna installs, I'd say that 99x out of 100 it's either due to the wrong antenna, cabling, and unknowns related to indoor/attic installs. The first two are easy to deal with. The latter....????

This is why I don't recommend attic installs and nobody else should who claims to know something about it. Sure, it can be made to work but for anyone wanting to just watch TV without a research project should expect on going issues if they go there. A few will get lucky but gambling is something I'd rather do at a craps table. Spending a day in a hot attic, pulling cable, etc. can be quite a let down when the results don't match the expectations.
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