If Keko hits the lottery !
On Wed, Mar 31, 2010 at 9:54 PM, Wangki Radio <wr936am@gmail.com> wrote:
> Hi Patrick
>
> How deep is enough to protect against lightning damage ? It all depends on
> the ground conductivity - and soil tests. But in doubt go as deep as you
> can.
>
> Can I suggest you do some reading here:
> http://www.copper.org/applications/electrical/pq/casestudy/nebraska.html
> The case studies and methods of solving are what we based our own grounding
> of our 70 metre high 936 Khz AM mast on.
>
> We are located at Fitzroy Crossing Western Australia 260km inland from
> Derby
> Western Australia and we get massive lightning storms. Since I have
> been station manager it has been my aim to correct and solve our equipment
> losses from lightning damage. In august last year we knew the Wet Season
> was fast approaching and we contracted a drilling rig to drill 3x to below
> 20 metres ( 60 feet ) holes. We have a 20 metre shaft about 1 metre from
> the AM mast GEM ( Ground Enhancing Material made by Erico ) was poured as
> a liquid paste ( 7 bags ) into the first hole. We then lowered section by
> section of copper rod and attached with 2 inch copper strap the rod to the
> mast. Another 26 metre hole located close to the hut has also been recently
> completed.
>
> Since installing we have had no equipment breakdowns - deep grounding is
> excellent insurance if you live in lightning prone areas ( don't we all !!
> )
> Hope this helps / Chris
>
>
>
>
>
> On Thu, Apr 1, 2010 at 8:26 AM, <navydude1962@yahoo.com> wrote:
>
> > I used one and it went in like a hot knife through butter...
> > Sent from my Verizon Wireless BlackBerry
> >
> > -----Original Message-----
> > From: Patrick Barkey <n9rvee@gmail.com>
> > Date: Tue, 30 Mar 2010 16:00:36
> > To: <towertalk@contesting.com>
> > Subject: [TowerTalk] Ground rods with jack hammer drill
> >
> > Has anyone on this list ever tried installing ground rods in rocky soil
> > with
> > a big jack hammer drill? What I had in mind was replacing the big with
> the
> > ground rod and driving it in. Having zero luck in this rocky stuff
> called
> > soil in western Montana.
> >
> > I am thinking of one of those big Hilti things with a jack hammer
> setting:
> >
> >
> >
> http://www.amazon.com/dp/B0036SCVSM/ref=asc_df_B0036SCVSM1071795?smid=A1QNWKKF9WDH43
> >
> > - Pat
> > N9RV
> > _______________________________________________
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