If you look at cell sites, they use heavy stranded copper wire instead
of strap. The wire is terminated in crimped lugs which are fastened to
copper plates with stainless bolts and nuts. Everything except the
copper plate is available at your local big box store. Copper plates are
available from lots of places via mail order. Since the copper plate
isn't THAT expensive, I would use that instead of aluminum plate.
73,
-John NI0K
Tom_N2SR via TowerTalk <mailto:towertalk@contesting.com>
Sunday, April 22, 2018 12:33 PM
Because of some new landscaping and the addition of a patio, I have to
redo my cable entry into the house/shack. I have a KF7P box mounted
on the outside of the cinder block foundation wall. It sits over a 2
inch hole which is sleeved with grey PVC to get the cables through the
wall (and into the shack).
I have 2 hardine runs, plus two RG-8 (Davis RF Buryflex) runs, and 6
sprinkler system cable runs from the base of the tower, which will
terminate to Polyphasers inside the KF7P box. In the KF7P box, I have
an 0.25" aluminum plate to mount the Polyphasers.
The shack is on the other side of the foundation wall (from the KF7P
box).
What I am planning to do is to add a 0.25" aluminum plate on the
inside (between the studs) in the shack. The plate will be about 12
inches wide (the KF7P plate is ~ 12 inches wide)
I want to tie the two plates together with some copper strap.
Any thoughts on the thickness of the strap? Georgia Copper has
0.012", 0.022", and 0.032" thickness. Are there other cheaper places
to purchase copper strap?
My thought is to use 1 inch wide strap, and use as many straps as I
can, across the tops of both plates. Doing that, I'll have to make
"flag" folds (triangle) on several of the straps to get them to line
up with the 2 inch PVC pipe, but I don't think that will be an issue.
I'm also going to tap holes in each plate to attach the copper strap,
and use stainless screws and flat washers.
Do I need Polyphasers on the plate in the shack?
Thoughts, suggestions, ideas, please.
Tom, N2SR
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