Sounds like it would make long lasting ground radials..
73s de Jim
W5IFP
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com]On Behalf Of David Robbins
> Sent: Monday, December 12, 2011 6:30 AM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] weird coax
>
>
> I don't know if i can trust my meters with such a high loss,
> but i think it is around 150 ohm... but i'm sure that none of
> the methods i used take into account the high loss. for
> instance, the minivna can't measure enough phase shift on
> reflections to get a lenght or velocity factor, and my mfj
> meter just reports constant 3db loss regardless of frequency.
>
> I saw some vague references to uses as some kind of probe use,
> but nothing specific. i could see that it would act as an
> attenuator for reflections so you could make measurements
> without adding distortion to a wave being sampled. Where i
> work they have made high voltage measurements on long
> transmission lines and measured traveling waves on transmission
> line towers, perhaps this was left over from a long forgotten
> experiment.
>
>
> Dec 11, 2011 11:29:23 PM, ai.egrps@gmail.com wrote:
>
> > This stuff is
> > definitely intentionally lossy, the center conductor is very
> high resistance
> > material like nichrome and only 26-28ga.
>
> I am trying to understand why lossy wire would be wanted.
>
> One use for coax delay lines, was oscilloscopes, so you could see the
> part of the waveform it was triggering on. Lossy line would result in
> frequency dependent losses, which I'd think would be undesirable.
>
> I see how lossy might be a consequence of the very thin wire needed to
> get an unusually high Zo, but not why someone would want to make it
> lossy.
>
> Can anyone explain it to me?
>
> If you measured the Zo, that might be a step in the right direction to
> identify this coax.
>
> Andy
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