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
--- On Wed, 11/3/09, Tom Jasinski <[email protected]> wrote: From: Tom Jasinski <[email protected]> Subject: [IRCA] Ground Resistance To: [email protected], [email protected] Date: Wednesday, 11 March, 2009, 3:34 PM There has been some recent discussion about outdoor antennas and grounds. No one has mentioned what a good ground RESISTANCE is. Here is my two cents worth. Since last fall I have been measuring ground resistance from four TEST ground rods in my back yard. The rod specs are as follows; one 3/4" dia X 10 foot copper clad steel, one 5/8" dia X 8 foot copper clad steel, one 1/2" dia X 30 inch copper tubing (some people call it pipe) and one 5/8" X 24" copper clad steel. This is what I read today for each of these rods using a 3 point method with a B&K Model 309 ground resistance meter. 10 footer has around 10 ohms 8 footer has around 23 ohms 30 incher has 166* ohms 24 incher has 175* ohms _______________________________________________ IRCA mailing list [email protected] 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: [email protected]
