I think what Dick was getting at is that the Polyphaser grounding lug needs to have its *own* ground separate from any other ground. If you tie the Polyphaser to the electrical ground of the building, youre defeating the entire purpose of having it But then again, Ive been wrong before. <wink>
Mark N9WYS ________________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of TGundo 2003 Sent: Friday, December 30, 2005 5:35 PM To: [email protected] Subject: Re: [Repeater-Builder] polyphaser Help Someone correct me if I'm wrong, but putting in your own ground rods and NOT tying them to the existing electrical ground system is a Bigger no-no. That would be creating a second ground system for the building and creating a potenital difference in grounds. That would be a bigger problem, and the local codes here require a bonding conductor of some sort. You can put in your own rods, which I agree with, but you must tie the two systems together and make it all one ground potential. It's all about equal potential, isn't it? If you don't get hit at all you don't have to worry about the voltages! How about the install on a all-steel mushroom type water tower? At the bottom the 1" threaded rods go in the ground and they are every foot around the perimeter. Makes a great ground plane for a DB-420! Someone please tell the cable guys to stop putting in the 4ft rods and creating ground loops! ;) Tom W9SRV Dick <[EMAIL PROTECTED]> wrote: Whatever you do, DON'T connect the polyphaser grounding lug to an AC outlet ground lug!!! That would bring HUGE voltages and currents into the building electric power system and expose everything on it to disaster!!! In which case you'd do well to carry enough insurance to replace all of the electric and electronic gear in the building. If you plan to connect it to the metal roof, make sure the metal roofing is securely grounded via an 8-foot ground rod in the earth near the building. In fact, there should be several such ground rods for a metal roof. The average frequency of a lightning discharge is around 125 KHz, so you can use that to calculate lightning rod cable lengths, etc. You might do well to contact the other tenants in the building and see how they feel about installing a proper lightning diversion system, including a proper lightning rod and cable. Happy New Year, Dick Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
