[TenTec] Dipole Over Pool Enclosure

[Jim GM]

Sounds like your on the right track.  I have change my email address to
this one and have been changing forums and the sort over. Sorry for the
delay.

Water pipe from building thats outside is good to clamp on to.  Your
resistance on ground is only as good as your reference. your reference good
be 35 ohms against say a fire hydrant.  a fire hydrant is usually the
reference when first building a subdivision when the electrician first
makes his measurements.

On Sat, Oct 13, 2012 at 10:27 AM, Wade Staggs <tvman1954 at gmail.com> wrote:

> *Several years ago upon moving my stuff in with my Beautiful Brenda, ( now
> a General Class KK4CJG ).... I had no permission ( at the time ) from our
> Landlord to put up an HF Antenna. After a bit of looking around, the Roof
> over all 3 Apartments was Aluminium. Using an Ohm Meter we found a really
> good ( low ohm ) connection between all panels of the roof. My Tuner would
> bring the SWR to ZERO on all bands. With the center conductor of the coax
> connected to the roof and a really good earth ground, I talked all over the
> world for about 3 months. One Hundred Watts only though. I never thought
> about High Powered Computer Modeling Software, just started talking.
> Currently, only one HF Antenna. Which is 126 foot Multi band Dipole. 63
> feet of #12 wire in each direction and fed with 450 ohm Ladder Line. The
> Tuner is very happy Except on 15 Meters which the Tuner loves at 100 Watts
> but plays Old Sparky at a full Gallon from 2 ... 3-500ZG's All other bands
> are Fine Business. My suggestion would be to Hang some wire in the air and
> see how it talks. Also, as someone has already suggested, A good Vertical
> in the middle of such a good Counterpoise as the Pool Enclosure, would
> assure some really good DX Contacts. I have talked all around the world on
> antenna's that the Computer Software did not seem too happy with. What I am
> trying to say is, like the Nike Slogan ... " Just Do It ! " Still wishing
> that we had not gotten a house..... That Humongous Aluminium Roof would
> have been Great with an Elevated Vertical sitting in the middle of it
> as it's Ground, Counterpoise.......*
> *                                                              73 to all
> cul de Wade/KJ4WS*
>
> On Sat, Oct 13, 2012 at 9:15 AM, Jim GM <jim.gmforum at gmail.com> wrote:
>
> > 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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-- 
Jim K9TF