For testing purposes, have you tried eliminating the splitter and running straight from the antenna to just one TV, using the shortest amount of cable you can?
If that seems to help then you may benefit from a signal amp.
In the hollow like that there's a good chance you are depending on reflected signals, just climbing up on your roof and giving your antenna a spin may be worth it too.
Thanks for the reply. Makes perfect sense. No, I did not, but will in just a bit.
And I noted that Pearl Hardware (ACE) sells a signal amp for $16. So if this is part of the problem, I'll get one today.
I am beginning to suspect reflection is part of the problem, as the leaves in the signal path disappeared as the 2.1 and 2.2 signal did.
49.1 remains back and 2.1 and 2.2 made it back briefly mid day Sunday. But, by 3 PM the KATU signals were gone.
But, how would leaves assist in signal reflection and capture? And why does the mid day have an effect on same?
As for the antenna, I am loathe to play with it. I spent hours finding the mid way point between the two main west hills towers getting the best, comprehensive signal from both. Too much pointing in one direction or the other degrades the signals coming from the non-pointed direction. And, again, it's a 2.1 and 2.2 problem I get every Winter, more severe this year - disappearing late fall and returning in spring.
I'll test direct feed to single receiver and, maybe, a signal amp, and get back here.