[TowerTalk] Polarity question..on a dipole

Jim Brown jim at audiosystemsgroup.com
Fri Mar 31 21:07:29 EDT 2017


On Fri,3/31/2017 5:38 PM, john at kk9a.com wrote:
> I have had temporary dipoles touch branches and there was no issue however
> the areas touching were closer to the dipole center than the ends. So if you
> can avoid having the ends touch it may work with regular THHN wire.

For a while, I had a 160M dipole that came in contact with redwood 
branches at one end. I regularly ran it close to legal limit. When I 
dropped it to tweak lengths, I saw that the THHN wire insulation was 
scorched.

I agree that this is unlikely to occur at contact points not so close to 
the ends where voltages are low enough to not arc or couple to the 
vegetation.

73, Jim K9YC



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