[TenTec] Dipole Over Pool Enclosure

[Bob McGraw - K4TAX]

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 at gmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec at 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 at 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 at arlut.utexas.edu>
>> Sent: Friday, October 12, 2012 3:54 PM
>> To: <tentec at 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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