[TowerTalk] Crank up tower lightning protection

[Grant Saviers]

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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