[TowerTalk] UV and WX deterioration of THHN insulation, and effects

[Jim Brown]

On Sat,12/31/2016 6:56 PM, Roger (K8RI) on TT wrote:
> I wonder if this too is a factor when the insulation is left on. There 
> is a very noticeable difference in the force required to bend the 
> stretched/hardened wire compared to new, unstretched wire.

Yes, it has nothing to do with the insulation. In an earlier post, I 
noted that I every two years, I have to circumcise my 80/40 JA fan that 
uses #10 stranded THHN for the 80M element. It's up about 130 ft, fed 
with RG11, so a lot of tension on it. I've changed to wire on the other 
80/40 fan to the bare #8 solid stretched to #9.

73, Jim K9YC