PBS was solid here in Stouffville until about the middle of May. The signal quality on my Samsung TV shows 25+ db when the reception is normal, and 15 db or less when it breaks up or disappears. I thought this was because of the heavy fog in the spring, but since mid-June it has been happening in all types of weather, day or night. Sometimes it also affects all the US channels, particularly when there's a lot of solar flare activity, but the major problem for me is that PBS is unreliable for any time-shifting. I can't find any information that would indicate that they are working on any equipment. I contacted CITY-TV a couple of years ago about a drop in signal quality, and they told me that they had to reduce power because people were working on the CN Tower. They didn't make it public then, so it's possible that WNED is in a similar situation.

Edit: removed non-related comment.