[TowerTalk] Impact of high water table levels on antennas
w7ry at centurytel.net
Sun Nov 3 19:26:18 EST 2013
Not to mention your location in W2 or W8 land!
You have no idea how hard it is to work DX on 160 meters from the
On 11/3/2013 3:37 PM, john at kk9a.com wrote:
> I do not think fresh water has much effect on verticals and even less on
> horizontal antennas.
> John KK9A
> To:"towertalk at contesting.com" <towertalk at contesting.com>
> Subject:[TowerTalk] Impact of high water table levels on antennas
> From:Rudy Bakalov <r_bakalov at yahoo.com>
> Ever since I have put up two inv-Vs, one for 80m and one for 160m, with
> 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
> 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
> performance of these two antennas simply does not match what the books
> 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,
> line, and FLAT terrain. His only explanation is that the new place had a
> high water table that somehow impacted antenna performance.
> This is when I realized that I also have a very high water table. Even in
> driest months of summer, the area around my tower is damp and the grass is
> green, growing like crazy. This was the obvious common element between his
> 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
> bands, but I am not sure if this is also the case on the upper bands as at
> 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
> why the antennas work so well?
> Rudy N2WQ
> TowerTalk mailing list
> TowerTalk at contesting.com
More information about the TowerTalk