For any of those in South Kennewick or close to the hill, here is the response I got from the KNDO tech.
"We changed to our final antenna and transmitter power level last Friday. The Effective radiated power on KNDU went from 31 Kw to 150 Kw and out transmit antenna is now 100 feet higher than it was before. Your problem is most likely not a reduction in signal, but too much signal.
The signal strength level meter is not just measuring the signal level, but also how much of the digital info is being recovered - so the level indicator is more a signal quality than a pure signal level meter.
I am assuming that you are using an indoor antenna. With a increase in power level, reflected multipath signals (what showed up as ghosts on the analog signal) that are bouncing off of objects in your immediate area and house also increased. The digital system can ignore the reflected signals up to a given level - the reflected signals just increase the noise. But if the reflected signals level gets too high, the ratio of the desired direct signal gets too low compaired to the level of all of the undesired signals and the receiver stops working. Moving the antenna and/or changing the aim slightly can change this ratio so you can get receive the desired signal. The amount of reflected signals is a function of both power and frequency - this is why not all of the channels are affected the same.
Another problem that can happen if you are using a amplified antenna - with an increase of power on the input, the amp and/or the receiver can be overloaded and distort the received signal. With the power levels in Kennewick from all of the stations, you should not have to use a amplifier. An amplifier will also amplify the multipath interfernce signals, causing a higher noise floor. Reducing the gain or removing the amp should be tried if antenna loaction does not get your signal back. In some cases adding a pad into the line from the antenna is needed to keep from overloading - but not to the point that you loose the weakest station."
So now I got to figure out how to keep my other signals up without dropping them but dropping the KNDU so I can see it. Would lowering my antenna gain KNDU, but end of losing fox, cbs, abc?