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Re: [TowerTalk] Coax is too long

To: Bryan Fields <Bryan@bryanfields.net>
Subject: Re: [TowerTalk] Coax is too long
From: Chuck Dietz <w5prchuck@gmail.com>
Date: Wed, 9 Oct 2019 12:56:26 -0700
List-post: <mailto:towertalk@contesting.com>
I’m not understanding what loss has to do with SWR.

Chuck W5PR

On Wed, Oct 9, 2019 at 11:34 AM Bryan Fields <Bryan@bryanfields.net> wrote:

> On 10/9/19 2:19 PM, Dave Thompson wrote:
> > Besides cutting it shorter and installing a new connector  can I coil up
> > the bottom and if so do it at the bottom of the tower or where it goes
> into
> > the house.  The SWR is OK but I need to get it off the ground.
>
> Cut it and reterminate it.
>
> SWR doesn't always matter when the coax is long, 200' of LMR400 on 440 is
> about 6 db of loss, and that makes for 12 db of return loss, or ~1.6:1
> VSWR.
> You could leave the coax shorted at the end and it would still show a 1.6:1
> VSWR on your meter in the shack.
>
> --
> Bryan Fields
>
> 727-409-1194 - Voice
> http://bryanfields.net
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