I believe a brazed joint will pop open if hit with a lightning induced surge.
Phil KB9CRY
> If you have but one chance to bury in the ditches and you're pressed for
> time, go get some copper plumbing pipe. Brazing the joints would be best.
>
> 73,
> Tony
>
> At 09:57 AM 10/21/2003, Eric Scace K3NA wrote:
> >Hi Warren --
> >
> > I would not bury braid for this application. Braid corrodes quickly
> > when exposed. As others have pointed out, corroded braid
> >develops a significant impedance at RF, which is not what one wants in a
> >grounding system.
> >
> > You would be better off getting some lengths of copper flashing such
> > as that used for roofs or gutters. 2-3" wide flashing is
> >fine. This gives a very low impedance ground than solid large-diameter
> >copper wire, and is much less expensive.
> >
> > Good luck with your project.
> >
> >-- Eric K3NA
> >
> >
> >-----Original Message-----
> >From: WarrenWolff@aol.com [mailto:WarrenWolff@aol.com]
> >Sent: 2003 October 21 Tuesday 00:30
> >To: eric@k3na.org
> >Cc: WarrenWolff@aol.com
> >Subject: Re: [TowerTalk] Site Grounding
> >
> >
> >Hi Eric,
> >
> >I tried to log back on to Tower Talk, but it seems I must have inserted
> >some strange character in my access info. Could not get in.
> >Not sure if I was successful in contacting the list administrator for help.
> >
> >I am retiring at Lake Havasu City AZ in 2005; ground is notoriously poor
> >there despite what the Antenna Handbook says is "just
> >poor".
> >
> >So, I thought as my neighbor was installing a 184 wall with a very deep
> >foundation and I am butting a 131 foot wall against his, I
> >could take advantage of these "long" ditches and place a long run
> >of grounding conductor in the bottom of the ditches. Then, it would be a
> >short run to either/both of my towers for lightning
> >protection. I would go ahead and run the multiple short
> >grounding/dissipators as typically recommended. I would also space some
> >copper rods along the run. There also
> >is a lot more lightning there than the handbook says, as well.
> >
> >One person responded that braid was not a good move. So, I guess I have
> >more to learn yet. Want to get the most reliable routing
> >to ground for the lightning protection, first, and then for entire
> >station. I have printed a bunch of stuff from the Internet for
> >reading, too.
> >
> >I am blessed to find that there are no tower height limits at the
> >lake. So I will achieve my dream of a big 40 m yagi plus some
> >nice multiband gadget on the other tower.
> >
> >Thanks for your response to my posting.
> >
> >Regards, Warren
> >
> >
> >_______________________________________________
> >
> >See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> >Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> >any questions and ask for Sherman, W2FLA.
> >
> >_______________________________________________
> >TowerTalk mailing list
> >TowerTalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather
> Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
> and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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