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Re: Topband: RG6

To: "Guy Olinger, K2AV" <olinger@bellsouth.net>,<topband@contesting.com>
Subject: Re: Topband: RG6
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Sun, 19 Mar 2006 17:02:26 -0500
List-post: <mailto:topband@contesting.com>
> RG6 will be fine. However, be sure to get RG6 with a
polyethylene (PE)
> jacket so the stuff won't go bad in the ground.


Any flexible coaxial line will go bad in soil that gets wet
if it is not direct burial cable. Direct burial cables have
a goo inside that displaces moisture. Solid metal shield
cables with bonded foam also last a long time under ground,
like heliax cables. I've had good luck with regular Andrews
heliax when buried. It has a solid copper tube shield and
the dielectric is bonded to the copper shield and center, so
moisture cannot migrate. Anything else is a risk.

I'd never use a flexible cable without flooding under
ground.

There is sometimes some confusion about non-contaminating
jackets. Non-contaminating has to do with chemicals in the
jacket migrating  into the cable over time, not with
moisture ingress.

73 Tom

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