To paraphrase, it depends on what the definition of a "good bond" is.
It seems to me that at the overlapped section ends, two legs are always
in contact at one level and at least one at the other level. Wind, tilt
from gravity, or off center tension from the hoist cables insure the
tower sections lean against each other. The wear marks I've seen on the
inside of crank up legs have the galvanizing missing where the "sliders"
are wearing when the tower is extended. So my bet is the tower legs
are the primary ground path, not the cables. So the path inductance is
probably about the same as similarly sized fixed towers.
Grant KZ1W
On 10/11/2016 15:17 PM, Ken Mitchell via TowerTalk wrote:
What is the common method of making a good bond for lightning between sections
of a crank up tower?
Seems the slip joint between sections would be a lightning protection weakness
if nothing is done...
Ideas or what has others done?
73,KenKD2KW
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