I have a unique situation.... I think.
My soon to be shack is in an external building, with service coming
from the house, underground. I was thinking that the best ground
point would be at the service box for the shack building and then run
a ground around the building.
On 6/10/07, Tom Rauch <email@example.com> wrote:
> > The shack will be in a walkout basement room. The entry
> > panel will be outside of this area.
> > The house is serviced with underground power and phone.
> > The nearest utility pole is about 800 feet away. (above
> > ground)
> > The utility power entry is located about 65 feet away on
> > the opposite end of the house from the shack. The utility
> > uses a UFER ground.
> > How should I tie/route the utility ground to my single
> > point ground. Does the tie wire need to be routed outside
> > and buried or can it be run through the structure or a
> > combination of the two? (concrete driveway and sidewalks
> > in the way outside)
> What you always want to do is have the least impedance at
> all frequencies between the utility ground at the house
> entrance and the shack ground.
> I face a similar problem. My shack entrance is 40 feet or
> more from the utility ground and the house is in the way. I
> used 4" copper flashing to bridge that gap, and I have a
> circle of heavy wire (mostly copper tubing) outside the
> house. I'm sure the most important thing is the direct wide
> ground connection. You want the impedance of that path to be
> significantly lower than the impedance through the house
> wiring to the radio room entrance. You won't get that with a
> connection run around outside.
> In your case I'd run right through the house with something
> wide, and not have any splices in the house that could fail.
> Also don't let that ground connection lay against or near
> anything metallic where it could make a poor connection that
> might arc and heat.
> Mine is tested and proven in dozens of hits, one was hard
> enough to melt the phone lines between the house and the
> road and melt heliax on the tower. Virtually nothing inside
> the house ( not even a modem) was damaged and I don't have a
> single polyphaser anywhere.
> 73 Tom
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