Re: [Repeater-Builder] polyphaser Help

[TGundo 2003]

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  W9SRVDick <[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              ----- Original Message -----   From: [EMAIL PROTECTED]   To: repeater-builder@yahoogroups.com   Sent: 30 December, 2005 11:22  Subject: [Repeater-Builder] polyphaser Help 
   Replacing a small, rooftop (about 90ft)  repeater setup.  The prior system had no lighting protection, just straight coax from antenna to duplexer.  I was looking into getting a polyphaser if needed but there is no way to ground it that I can tell.  Two options I have would be to somehow tap into the metal roof and connect it to that? or at the radio-end of the coax attach it to a nearby AC outlet's ground?  A grounding line/rods aren't a real good option since it is on another businesses property.  Any suggestions?  
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