Well, we're glad you got it going. :up
I guess the slight frequency drift was the culprit.
That can happen, and living in the biting cold, you should probably be even more cognizant of that than many of us.
But, now I have a question...
I've been wracking my brain to think where you could have gotten a Universal LNB that'd bolt to the original Channel Master feedhorn?
The other choices are: the Hughes but it's Standard, and the Dish Network FSS from a 105° dish, but it's bandstacked.
So, inquiring minds want to know.