[Nascarken]

Originally Posted by jrgagne99

It is curious that KGCW is dropping out because it has a pretty solid Noise Margin for the HDB91X, and you are aimed directly at it. Especially since you say that you ARE pulling in K30NF and KYOU at 323-deg, which are several dB down in NM, apparently on a side-lobe of your HDB91X . You might be in a hot-spot for stations from 323 and a lull for KGCW. The Longley-Rice propagation model used to generate your report has limited resolution and does not capture multi-path constructive and destructive interference caused by signal refraction over the terrain.

When you were previously receiving KGCW, did you happen to notice the signal strength on your TV? If it was only borderline, it would not be surprising to see it drop out now and then with changes to atmospheric conditions, etc. You might try moving the HDB91X up or down a foot or two (or more) to see if that improves it, and/or adjust the aim a few degrees left or right. The HDB91X also has a tilt-angle adjustment, which you could fiddle around with-- some people here have had success using that. Best to do all of your experimenting with a buddy monitoring the signal strength down at the TV, so you have some live feedback as to what is working and what is not. You might want to disconnect and remove the 2476 from the setup while you're making your adjustments to the HDB91X. Then add it the 2476 back in later to see if its presence is having some effect on your UHF reception. Hopefully anything you do to improve reception of KGCW will not adversely affect reception of your stations from 323-deg.

No I Don t think so!!