Ron:
If you decide to put your radials in slits in the driveway, there is a
power tool that will make the slits for you. The neighbor around here had
an invisible fence installed around his house to confine their dog. To
install the perimeter wire across the driveway, the tech used a tool with a
small circular blade to cut a slit across the asphalt. I'm not sure how he
sealed the slit, but the scar is very neat. Maybe you could call up a local
invisible fence purveyor (or a rental place) to locate one for you.
73 de
Gene Smar AD3F
----- Original Message -----
From: "jbattin" <jbattin@msn.com>
To: <topband@contesting.com>; "Ron Feutz" <feutz@wctc.net>
Sent: Wednesday, July 16, 2003 9:28 PM
Subject: Re: Topband: New 4-square
>
> ----- Original Message -----
> From: "Ron Feutz" <feutz@wctc.net>
> To: <topband@contesting.com>
> Sent: Wednesday, July 16, 2003 2:23 PM
> Subject: Topband: New 4-square
>
>
> > Gentlemen,
> >
> > I recently moved to a new QTH and plan to build a new 4-square.
> >
> > My antenna field is 175' wide X 500' long, and is heavily wooded. An
> > asphalt driveway runs roughly down the middle of the antenna field.
> > The long lot lines run directly N/S. A traditional 1/4 wave per side
> 4-sq,
> > with the sides parallel to the lot lines, would be properly oriented NE,
> > SW, etc. There would be 2 elements on either side of the driveway with
> > short radials towards the sides and middle of the lot (E-W) and longer
> ones
> > towards the ends (N-S). Because of the compromise radial system I would
> > want to connect the 4 elements' radial systems together.
> >
> > Questions:
> >
> > 1. My ground system and phasing lines will have to cross the driveway.
I
> > can do one of the following: Run buss wires along both sides of the
> > driveway and connect the radials to the buss wires and then either go up
> > and over the driveway (about 8' or so) to connect the systems together
> with
> > a relatively few wires, or bore under the driveway ( I don't know how
this
> > is done or how much it would cost) to connect the systems together.
Would
> > the up and over method cause any performance problems or pattern
> > disruptions? It would be easy, as there are plenty of trees available
for
> > supports (the driveway is only 8' wide).
> >
>
> The up and over has problems. The impedence of the radials is very low,
and
> I am afraid the up and over would be like an RF choke. These radials are
in
> parallel with others, and the "others" would hog the current. I would cut
a
> few slits in the driveway for the wires (or a slit for the feeds and just
> lay the radials on top) and have the black-top man come and cover them up.
>
> John K9DX
> >
> >
> >
> > _______________________________________________
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> > Topband@contesting.com
> > http://lists.contesting.com/mailman/listinfo/topband
>
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