Topband: When is coax 'contaminated' beyond use?

[Mike Waters]

I don't know exactly what you mean by "dump power", but I suggest that you
throw that nasty corroded coax in the garbage. Do not pass go, do not
collect $200. ;-)

Not unless you can figure out a way to scrape all sides of all the strands
in that shield! *For an effective shield braid, they all need to make
contact with each other*. The way it is now, that can't happen, can it?

73, Mike
www.w0btu.com

On Sun, Feb 3, 2019, 9:55 PM terry burge <ki7m at comcast.net> wrote:

> A few years back some 9913 I was using apparently got water in the coax. I
> say this because of fluctuating SWR issues and I noted the shield when cut
> into was almost 'black'. So for my minor purpose of using spare coax for my
> dump power on an 80 meter 4-square can some of this coax be used? When I
> scrap the shield after exposing it with a knife will reveal the shinny
> copper again so is that sufficient to use some for reading dump power on my
> wattmeter at the shack? Seems if I try and get readings like what I had
> with the LMR-400 then it could be used. Coax is so expensive these days I
> want to use my valuable LMR-400 elsewhere if possible. And having a
> convenient way of reading dump power is of course important too.
>
> Terry
> KI7M
>
>