And doesn't that big coil of excess hardline look just like an inductor to lightning? That might explain why it arced where it did.
Bob M. ====== --- Jeff DePolo <[EMAIL PROTECTED]> wrote: > 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] ____________________________________________________________________________________ The fish are biting. Get more visitors on your site using Yahoo! Search Marketing. http://searchmarketing.yahoo.com/arp/sponsoredsearch_v2.php
