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Re: [TowerTalk] XHHW wire

To: towertalk@contesting.com
Subject: Re: [TowerTalk] XHHW wire
From: Steve Bookout <steve@nr4m.com>
Date: Wed, 19 Feb 2020 13:08:28 -0500
List-post: <mailto:towertalk@contesting.com>
Very timely post!

For years, I've had a 4 element 80 delta loop array suspended from a catenary stretched between two 190 foot towers.

I used THHN when I built it, but with time, the insulation is coming off the wire.  I know that when I designed it, I had taken the velocity factor into account WITH the PVC wire insulation.

Now, that I am losing my insulation, I have been looking for a better alternative to the THHN wire.  Is this it?

Can anyone comment on the difference in the insulating material?   PVC vs ???   And, maybe the difference in the dielectric constant f/u/w EZNEC?

This is my 'bread and butter' EU antenna.

Comments appreciated.

73 de Steve, NR4M

On 2/18/2020 7:15 AM, john@kk9a.com wrote:
Great post!  I do not know the difference between PVC and XLPE, perhaps someone on the list does. XLPE is rated to have good UV resistance, whatever that means. I have never seen any damage to THHN PVC however it certainly it would be nice to not have the clear outer nylon coating when it is used outdoors for antennas and rotators.

John KK9A

Dick NY1E wrote:

In the spring I'm building new dipoles for 160, 80 & 40, instead of using THHN I see Home Depot has XHHW #12 stranded, like THHN but without the nylon jacket and it says its UV resistant. Has anyone used it? It's a bit more expensive at $98/500' vs $65/500' but if it keeps that nylon from hanging off the antennas....de Dick NY1E
Sent from Yahoo Mail on Android

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