If that water table is salt water then maybe yes... Fresh water doesn't really
make that much difference until you get to 160m .
YMMV,
Dave
Wa3gin
Sent from my iPad
Be Prepared Stay Prepared
> On Nov 3, 2013, at 2:02 PM, Rudy Bakalov <r_bakalov@yahoo.com> wrote:
>
> Ever since I have put up two inv-Vs, one for 80m and one for 160m, with their
> apexes at roughly 90', I have been puzzled by their exceptional performance.
> Ditto for my vertical on 40m. I have done tons of comparisons using skimmer
> data and my signal seems to be pretty darn close to the big stations I am
> using as my benchmark. The performance is so good that I have been wondering
> if I should bother with building 4SQs. I have read tons of books on antennas
> and the performance of these two antennas simply does not match what the
> books describe.
>
> I shared my thoughts with a friend of mine (a WRTC2014 participant) and he
> shared a similar experience with his station. He recently relocated to a new
> place, about 30 miles from his old place, and his antennas at the new place
> perform significantly better than the old location. Same antennas, tower,
> feed line, and FLAT terrain. His only explanation is that the new place had
> a very high water table that somehow impacted antenna performance.
>
> This is when I realized that I also have a very high water table. Even in the
> driest months of summer, the area around my tower is damp and the grass is
> very green, growing like crazy. This was the obvious common element between
> his and my situations.
>
> I have not seen anything on high water tables in my antenna books. The soil
> itself is mostly sandy. The impact I believe I am seeing is mostly on the
> lower bands, but I am not sure if this is also the case on the upper bands as
> at 105' my antennas are a bit too high.
>
> Is there any rationale in our thinking? Can high water table explain better
> than expected performance from low band antennas? If so, what is the theory
> behind it and how do I take advantage of it? If not, any other suggestions
> for why the antennas work so well?
>
>
> Rudy N2WQ
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