At 09:26 AM 11/20/02 -0500, Mark . wrote:
>Interesting data posted about actual DC conductivity across joints. I
>think the towers that benefit most from jumpers across the joints are
>larger sizes where the sections to not have socket joints but rather have
>flat faces at the joints that are simply bolted together. There was some
>discussion of this ages ago in the archives.
>Socketed joints that were not cleaned and prepped with antioxidant could
>probably benefit as well.
Here's another data point. The 50 feet of Rohn 25 between my shunt feed
ground and the tap on the tower, plus 50 feet of #14 copper, measured under
0.05 ohms on my DVM -- actual reading was 0.0. Whew -- another thing NOT to
worry about before Friday.
Mileage clearly varies on this -- I did no special prep on the joints,
though they were relatively clean and rust-free. Is Zinc oxide conductive?
73, Pete N4ZR
Sometimes a tower is just a tower
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