I had lightning rods installed on my house, and has been a very good investment. Guy from Indiana comes down here in winter/early spring and installs them here in southern TN. Joe W4AAB ----- Original Message ----- From: "david knepper" <[EMAIL PROTECTED]> To: "Gary Schafer" <[EMAIL PROTECTED]>; "'Stevan A. White'" <[EMAIL PROTECTED]>; "'Discussion of AM Radio'" <amradio@mailman.qth.net>; <[EMAIL PROTECTED]> Sent: Tuesday, June 13, 2006 6:33 AM Subject: Re: [Boatanchors] RE: [AMRadio] Tower Construction
> I appreciate all the email on this subject. > > Interestingly, when lightning rods were placed on barns all over this > country, I cannot recall any barn in our region ever catching on fire > because of a lightning strike. I am sure that it did happen in other > regions, particularly, in the Midwest/ The installation was to run a very > large conductor cable from the lightning rod to the ground. There were > generally two rods on either end of the roof. I would theorize that a > lightning strike should be directed to a ground rod placed a few feet from > the tower rather than to travel under the base of the tower as some have > suggested. I am going to ground the tower at the three legs with a copper > strap and then to a ground rod about 3 feet from the tower. > > Also, the Empire State Building and other skyscrapers get struck many times > during a thunder storm and I wonder if anyone knows if the lightning travels > through the superstructure or through cables/straps to the base of the > building and through ground rods. > > Thanks > > Dave, W3ST > Publisher of the Collins Journal > Secretary to the Collins Radio Association > www.collinsra.com - the CRA Website > Now with PayPal > CRA Nets: 3805 Khz every Monday at 8 PM EST > and 14255 every Saturday at 12 Noon EST > ----- Original Message ----- > From: "Gary Schafer" <[EMAIL PROTECTED]> > To: "'Stevan A. White'" <[EMAIL PROTECTED]>; "'Discussion of AM Radio'" > <amradio@mailman.qth.net>; <[EMAIL PROTECTED]> > Sent: Monday, June 12, 2006 10:10 PM > Subject: [Boatanchors] RE: [AMRadio] Tower Construction > > > > Be careful when giving this advice. > > A UFER ground is a good SUPLEMENTAL ground in a tower base but it should > > not > > be the only ground. A large area like a floor of a building provides more > > surface for the lightning to dissipate. A tower concrete foundation may > > not > > be large enough by itself and there is the possibility of poor connections > > inside so that the concrete crack from a lightning strike if it is the > > only > > ground connection. It is always recommended that ground rods be attached > > to > > each tower leg in addition. > > > > 73 > > Gary K4FMX > > > > > > > >> > >> DO RUN THE GROUND THROUGH THE CONCRETE! Take a look at the information > >> on > >> this site first though. You may be glad you did. > >> > >> http://www.scott-inc.com/html/ufer.htm > >> > >> Best Regards, > >> Steve White, W5SAW > >> SW Commercial Electronics > >> > >> > >> -----Original Message----- > >> From: Ed Swynar [mailto:[EMAIL PROTECTED] > >> Sent: Saturday, June 10, 2006 2:16 PM > >> To: Discussion of AM Radio; [EMAIL PROTECTED] > >> Subject: Re: [AMRadio] Tower Construction > >> > >> > >> Hi Dave, > >> > >> I have a 48' tall, tapered, self-supporting "Delhi"-brand tower --- 6 > >> sections at 8' long each. > >> > >> The prescribed / manufacturer's recommendation is to bolt a 3' straight > >> formed extention at the base of each leg (total of 3), & to "suspend" > >> these > >> (a temporary wooden "cradle" will do admirably, as the cement sets) in a > >> hole dug 4' square, & 4-1/2' deep --- the cement is to come but a few > >> inches > >> below the bottom legs of the actual tower section. > >> > >> Oh yes --- the bottom 1' of the square hole is to be "belled" outward a > >> foot, or so. > >> > >> The documentation says this is good for heights of up to 64', or > >> so...I've > >> never gone beyond 48', & have never, EVER had an ounce of trouble in the > >> two > >> locations that I've had my tower up. > >> > >> BTW, the top of the tower as an old Cornell-Dubelier AR-44 rotator, & a > >> 3-element Hy-Gain TH3 MkIII triband yagi... > >> > >> Use "industrial"-grade coarse cement, & do NOT run any ground leads > >> through > >> the block itself! > >> > >> ~73~ Eddy VE3CUI - VE3XZ > > > > > > _______________________________________________ > > Boatanchors mailing list > > [EMAIL PROTECTED] > > http://mailman.qth.net/mailman/listinfo/boatanchors > > ** List Administrator - Duane Fischer, W8DBF/W9WZE ** > > ** For Assistance: [EMAIL PROTECTED] ** > > $$ For vintage radio info, see the HCI web site $$ > > http://www.w9wze.org > > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb >