Isn't this why WMTW moved off Mt. Washington - concern that if they ran a full digital signal from up there the signal would miss Portland altogether?
I too find I have to fiddle with the antenna to get Fox 25 and can't get 56 or 38 at all out in Holliston. Why wouldn't 56 come in if 7 comes in on both 7 and 42 and they're on the same tower?