On Fri, 21 Feb 2003, Mike Singer wrote:

> Dale Botkin wrote:
> > > Cable DC resistance could vary tremendously, I think.
> >
> > I believe he meant that the cable loop resistance with
> >  the distant end open is infinite.  Which would be true.
>
> I haven't specifications for cables isolation right before
> me. Let's ask RF guys, what is the resistance of an
> isolation of a long old cable feeding, say, antenna under
> rain, under sun?

Unless the cable is simply defective, the DC resistance would still be,
for practical purposes, infinite.  I've seen old coax and twisted pair
with way screwy impedance caused by various factors, but unless it's
physically damaged and shorted (which, of course, a TDR would show) it's
an open circuit.

Dale

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