Thank you much for the responses--the calculations really helped me get to look at the situation quantitatively.
While the few tall trees caused some signal loss, the most surprise I have is that I am not seeing KGO (my most frustration...) with the current older antenna, while reception from KRON is still decent @ 60-78% signal as reported by CM-7000 (w/o a splitter). KTVU (2.1), KQED (9.1), and KMTP (32.1) all @ same angle/distance, and all had excellent signals (100%). They all had slightly better NM's than KGO, but don't seem to explain the relatively weak signal from KGO.
I am seeing that other people in the neighborhood are experiencing the same weak incoming signal from KGO station:
http://www.hdtvantennalabs.com/locat...5+Calistoga+Dr
As you can see from the other reports (locations in other zip codes), KGO's signal is always marginal.
If I can get a large VHF boost to mainly get KGO,
and a medium boost on UHF channels enough to get a stable view of KTLN and a few other semi-weaker stations, for example (with splitter in place)--while not losing the signals from other UHF channels, then I am really happy.
So perhaps I'll lean on looking @ HBU 33 first (I really want to get KGO...). BTW, I suppose, HBU33 is better than Winegard HD 7695P?