Your plan of connecting the antenna directly to one tuner is a good one. If it's not too much trouble, I would carry the TV up to the third floor, close to the antenna. The idea is to determine the quality of the signal at the output of the antenna, before any old coax, amplifier noise or splitter loss complicates the situation.
If you have a good signal at the antenna, then you can expect to find a reliable solution for distributing the signal.
An amplifier can only use the signal available at it's input. So, an amplifier at the end of the line is at a disadvantage compared to one close to the source. The CPA-19 suggested earlier is definitely worth consideration if you need to overcome cable and splitter losses.
But again, be sure you have a usable signal at the antenna before you add other factors.
The idea of using Ethernet over coax adapters is very viable. I would add that complexity only after I had the basic antenna and distribution system running reliably.
Also, be on the lookout for loose or otherwise faulty connections on the old coax... those old crimp connectors were a constant source of trouble, even when assembled using pro-grade tools.
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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-Mar-2012 at 6:17 PM.
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