Actually I should have said "low R/L conductors". R/C came off my fingers
instead.
If you think of lightning being RF and not DC, a lot of the mysteries
regarding the right way to ground equipment, antennas, feedlines, etc. goes
away. Lightning behaves a lot like a very ragged step function, rife with
harmonics. It has a DC component to it, but the short rise time and
arc-like spectral equivalent demands it be treated like RF. Impedance
increases caused by inductance in the lightning's path to ground is your
biggest enemy. Having a good earth ground to dissipate the energy into is
just as important; a single ground rod might satisfy NEC but isn't going to
thwart Thor.
You should have said "I'm Nate Duehr, and I approve this message."
--- Jeff
> -----Original Message-----
> From: [email protected]
> [mailto:[EMAIL PROTECTED] On Behalf Of Nate Duehr
> Sent: Thursday, June 21, 2007 1:18 PM
> To: [email protected]
> Subject: Re: [Repeater-Builder] RE: VSWR Issues - Repairs Complete
>
>
> On Jun 21, 2007, at 8:56 AM, Jeff DePolo wrote:
>
> > Ground kits at top and bottom of vertical feedline run (before any
> > bends),
> > and another ground kit at the entrance port to the
> buildling/shelter.
> > Polyphasers inside the shelter mounted to the the common-point
> > ground bus
> > bar for all of the indoor equipment, with the indoor common-point
> > ground
> > tied into the site ground system using low L/C conductors
> (3" Cu strap
> > preferred, #2 AWG for short runs, avoiding right-angle bends).
> >
> > --- Jeff
>
> Amen. You may be seated. :-)
>
> --
> Nate Duehr
> [EMAIL PROTECTED]
>
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> Date: 6/20/2007 2:18 PM
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