Hi Gary, Interesting discussion. Depends on what type of soil, but as a general rule for lightning is much better with multiple rods deep into dirt (9ft +) with spacing distance between rods equal or bigger than the rod length. I've seen grounding installed close around a concrete structure cracking the concrete base on a direct hit. Many hams are literally pushing a 3ft rod into dirt, inefficient, my opinion is to prepare the grounding before and salt it periodically. Here is a good document, is a must to be read for the ones with lightning activity. http://members.rennlist.org/warren/ground.pdf vy73 de VE3GNO Daniel
________________________________ From: Gary Gregory <garyvk...@gmail.com> To: Elecraft <elecraft@mailman.qth.net> Sent: Monday, September 10, 2012 6:30:52 PM Subject: [Elecraft] Ground Rods *Interesting discussion locally here in VK. Is there any advantage in having the Copper ground rod surrounded by concrete over having the rod driven 6 feet straight into the earth? Hope this doesn't get too far off topic or develop into a prolonged discussion but I realised I didn't know the answer if there is one. 73 * -- *Gary* *Start the day off slow, then taper off.........* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net/ Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
