On 7/27/2018 9:26 AM, Paul Christensen wrote:
"My thoughts, so far, are to start from the highest point, with: 1. A
mast with rotator, bonded to the tower, with the topmost antenna
down, say, 5ft from the mast top so the mast forms a sorta lightning rod"
Bonding around the rotator is important to prevent passive intermod
within the rotator itself!
I think that's mostly a "feel good" exercise. Focus on the bonding effort.
OTOH, I have a DC grounded M2 3 el. 30m monobander at 115 ft. above a
4-element SteppIR at 100 ft. My own "feel good" thought was that the 30m M2
*may* offer some protection to the SteppIR. I doubt it, but it felt good.
Paul has given excellent advice throughout this. I had a station at a
similar decommissioned AT&T long lines site for a while (160 ft tower,
32' square at the base, 24' square at the top), and had the opportunity
to study the grounding. It's textbook.
73, Jim K9YC
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