"raised the house 50 inches?"
If you look at the terrain profile, you can see you might benefit more significantly from more antenna height.
http://www.tvfool.com/?option=com_wr...dALLTV%26n%3d8
Try running a couple TV Fool reports with greater antenna height, and let's see what those look like.
In the analog days, you could generally get a usable signal with less power (though it would be snowy and fade in and out). Digital doesn't degrade as smoothly as power declines; it's more all or nothing.