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One thing I have to consider, I have read you can create more problems then solve them when you try using a pre-amp with an distribution amp. So I have to consider what I want as a final setup.
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That is correct; it is rare that both are needed. There is such a thing as too much amplification; if the preamp doesn't get overloaded, the tuner might. Using both would only be appropriate if
all your signals are weak, and you are feeding many TVs with long coax runs.
The advantage of using a preamp instead of a distribution amp of the same gain is that the preamp is positioned near the antenna which gives a lower system noise figure because it eliminates the coax downlead loss between the antenna and the amp. However, in many cases if the downlead is short the distribution amp can perform nearly as well as the preamp, if the distribution amp has a low noise figure.
What is interesting to me is that I have been working on your thread and two others that are very similar to yours: separate VHF and UHF antennas, missing channel, and terrain interference. When switching back and forth between the threads, I have to review each thread to keep from getting them mixed up and giving the wrong advice.
It might benefit you to look at those two other threads if you haven't already. MikeBear solved his problem by raising his antenna:
One channel issue, high VHF
http://forum.tvfool.com/showthread.php?t=15701
Antenna options
http://forum.tvfool.com/showthread.php?t=15459