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The larger versions of the HD769x series have more gain, therefor more range, and additional fade margin for closer signals.
The CPA-19 is a separate part, from a competing vendor. It handles stronger local signals without overloading and adds less noise to the signal (as compared to the other name brand preamplifiers).
If your existing rotator is still serviceable, I'd recommend keeping it. Most of the new rotator product on the market has gathered a less than stellar mass of review. It seems that for a while at least, quality control was a problem.
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If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)
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Last edited by GroundUrMast; 4-Jul-2012 at 5:26 AM.
Reason: comment re. rotators
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