I'd recommend first upgrading the coax to RG6. RG59 is very lossy and 85' of it is probably costing you at least 10-12 dB of signal power. RG6 would cut that loss about in half.
If you elect to use a preamp, only an amp with the overload characteristics of our Juice will prevent new problems from developing as they would inside a lesser amp. You'd still need to use RG6, that's too much RG59 for the amp to be properly supplied with its power.
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It is pointing almost due North.
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Unfortunately, that aiming direction will probably sacrifice the stations from Cape. Aiming the antenna at Cape will unfortunately sacrifice your PBS station. Unfortunate station alignment.
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House is surrounded by a lot of trees (we basically live on a hill, surrounded by woods).
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When there is a lot of wind we get some breakup and signal loss.
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Again, an unfortunate circumstance. The trees effectively shred the signals before they ever get to the antenna. The only sure solution is for the antenna to not be behind trees. Yes, I'm aware that is not often possible, but it is how the UHF signals behave.