At 16:40 3/12/2009, you wrote: >Hello Tom >I did not appreciate copper pipe of different lengths gives lower resistance. >10 footers are a none starter here. Would 3 x 3 foot copper ground rods be >around 10 Ohms or are the mathematics not as simple as that? I use a EWE >antenna where grounding is all important by all accounts. >Barry
Patrick Martin will give you the answer on that, Barry. One problem with these ohmic measurements, I believe, is that they're applicable primarily to power line frequencies (that's what the B&K measures), and in some circumstances you may be better off when dealing with RF to use three or more shorter ground rods spaced out and wired together. I suspect the really deep rods only make sense if you have a soil that dries out easily at the surface (usually sandy soil, which is generally easy to drive rods into). I believe that I have an article or two on the subject kicking around here. best wishes, Nick ***************************** Nick Hall-Patch Victoria, BC Canada _______________________________________________ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
