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The conductivity of copper is better than aluminum but the difference in total resistance over the length of an antenna element is only going to be a few 1/1000ths of an ohm at the most. That tiny amount of additional resistance has no practical effect on the efficiency of a receiving antenna operating at a nominal 75Ω.
By far and away, mounting location and basic antenna design are going to be overwhelmingly more significant factors affecting reception results.
If you wish to build an antenna using copper, no harm... but don't expect a measurable difference in performance compared to an identical aluminum antenna.
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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; 10-Jun-2012 at 6:18 PM.
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