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KF7K

Joined: Mon, Apr 7th 2003, 14:05 Roles: N/A Moderates: N/A

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Vertical Antenna on Metal Roof: DC Ground to the Electrical Service Mast? May 27th 2012, 03:59 3 1,069 on 11/6/12

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Vertical Antenna on Metal Roof: DC Ground to the Electrical Service Mast? KF7K on 27/5/12
I'm thinking of putting a multi-band trap vertical antenna in the middle of my metal-shingled house. I'll use radials laid over the roof as the RF ground system, but I am considering using the electrical service mast, only 8-10 feet away from the vertical, as a DC ground for the feedline lightning arrestor (there is a second ground point at the bottom of the feedline, just before it enters the house-grounded into a ground rod).

Will my plan make the power company mad?
Is my plan just asking to pull household EMI into the antenna?
Will a ground at the antenna make my house-wide electrical ground act like one huge radial?

I guess my question, deep down, is the role of the coax shield--how do I tell if it has lots of RF voltage on it relative to the house ground? Both are grounded to a rod, just at different places, but I know RF doesn't act much like like DC, and sadly I think in terms of DC.

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