Jim's comment is well taken. However I must emphasize that disconnecting
the antenna is only 1/2 of the issue. You MUST disconnect your ground too,
specially if you have any of your equipment plugged in to any AC outlet.
The AC mains plus neutral and ground, and having your station ground
connected too, is a path for lightning discharge and the path is through
your equipment.
73
Bob, K4TAX
----- Original Message -----
From: "Jim GM" <jim.gmforum@gmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Saturday, October 13, 2012 9:15 AM
Subject: Re: [TenTec] Dipole Over Pool Enclosure
Tie everything and any thing you can to ground or ground side of the
antenna. this will reduce noise. Especially on top bands. Lighting is a
hazard. Best is to disconnect radio from antenna and ground so you do not
get lighting feed back into the shack.
On Sat, Oct 13, 2012 at 8:18 AM, denton <denton@oregontrail.net> wrote:
Probably the swimming pool uses salt for conditioning.
I just returned from The Villages visiting family, and their pool uses
salt instead of chlorine. They have a bird cage as per regulations.
I also was informed that a lot of houses have extensive lightning rods
protection on the roofs...I could see the little spikes and grounding
system on the rooftops
------------------------------**--------------------
From: "Stuart Rohre" <rohre@arlut.utexas.edu>
Sent: Friday, October 12, 2012 3:54 PM
To: <tentec@contesting.com>
Subject: Re: [TenTec] Dipole Over Pool Enclosure
The modeling over a metal pool structure would involve interpreting the
effect of the fresh water pool on the antenna ground conditions, and
also
the ground effect of the metal structure. The analogy could be made to
modeling a mobile whip over a car structure. This has been done and was
written up some years back in "Communications Quarterly" or "QEX". I
believe by a VE ham who worked for Canada's Propagation Laboratory. A
segmented outline of the car shape was used in the calculation of
fields,
much as you use segments of the antenna in NEC Antenna modeling.
-Stuart Rohre
K5KVH
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--
Jim
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