Rick:
You didn't say what kind of tower. I'm assuming this is a Ham type tower
at your house, but you might want to say so if it's otherwise.
Keep in mind that lightning protection is not individual things you do,
it's an overall approach you take. If you haven't already, you should read
up on "Single Point Grounds" and live by that approach.
As to your question, I don't think you need to get an official gounding
kit for your transmission line. Simply cut a strap of copper flashing
(handy stuff to have around), wrap it around the line where the outer
insulation has been removed and clamp it tightly by running a bolt through
the ends. Attach a heavy and very short low inductance cable at that point
and ground it to the tower, preferably where one of the main tower
ground and the same place the ground strap to the single point ground is
terminated. Of course cover the area of the transmission line where the
strap is well to protect it from the elements.
Having said that, however, if this is a home tower installation, you
probably don't need the ground kit at the bottom of the tower, nor at the
top as long as it's a very short run from the tower to the single point
ground (and of course the transmission line is terminated at the ground
panel anyway), and the gound path from the single point ground is right
back out to the tower. You probably don't need it at the top either (and
I'm assuming this Sinclair antenna has grounded elements), unless your
transmission line is taking some significantly different route than the
way the antenna itself is mounted. If the support for the antenna isn't
much higher than the top element you might want to put some kind of short
mast up from there to try to keep lightling from hitting the antenna
elements.
Probably a lot of other things that need to be considered, but the main
thing is that you want to protect your equipment. The single point ground
approach will do that.
Chuck
On Sat, 15 Jan 2005, Rick - VA3RZS/Charlotte - VA3CMR wrote:
>
> Hello group
>
> I am looking for some grounding kits for the LDF5-50A 7/8
> Andrews Heliax
>
> I have one allready installed at the top of the coax and was told I
> should have one at the bottom also .. any comments on this ?
>
> I want to protect my Ant and repeater system the best I can ..
> the ant is a sinclair 4 bay (cant remember the model off hand)
>
> this ant is sid monted on the top of the tower ( 2 bays above the
> tower)
>
> Thanks for any and all help on this .. I am also running another line
> up the tower and need the kit for that also ..
>
>
> Also for LDF4-50A wich is 1/2 inch
>
> again thanks verry much ..
>
> Rick
>
>
> Rick Szajkowski VA3 RZS
> Charlotte Darby VA3 CMR
> Node Owners of IRLP Node 2120
> Lakefield Ont Canada
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