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Based on the signal analysis for your location, my theory is that you are receiving a marginal quality signal at night. As the sun rises television signals experience more interference. Digital TV will look virtually perfect until the signal quality drops to the point were data errors occur. At that point the picture may pixel-ate, come and go or just quit completely.
FM stations near you can also be a source of interference to weak DTV signals.
If you are able to increase the height of your antenna, you can expect to get it little more signal strength... that might be enough to improve some of the signals lost during the day. I would expect that lowering the antenna would most likely make things worse.
Most tuners provide some sort of signal quality / 'strength' indication. If my theory is correct, I would expect that as you watch a channel that 'goes away' during the day, the signal will start to get worse some time around day break and will gradually get worse until the picture begins to breakup and finally quit... the signal indicator will in most cases still show some low or weak level.
Here in Seattle the transmitters are scattered in many directions. During the day I tend to loose one or two of the stations that my antenna is pointing away from. If I aim directly at those stations, I get a reliable signal.
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If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)
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Last edited by GroundUrMast; 9-Nov-2010 at 10:25 PM.
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