In article 4a3f51c1.796538671@localhost, Don Pearce
wrote:
[snip]

This is all true, but of course all filters (of the non-absorptive type)
work by selective, controlled mismatch.

Or by circulation or redirection. :-)

But when that filter is just a piece of cable, we have a situation where
the attenuation is not only unpredictable, but could quite easily result
in an increase in level when the impedance of the cable is somewhere
intermediate between the source and load impedances. In other words, all
you can say about cables used in this way is that the levels of RF will
be different at the two ends.

Yes. Thus the need to determine if the conditions of test are appropriate
for normal use situations. The curio for me is that the conditions chosen
show very small levels of (B) for the standard cables. I'd expect that if
the standard cables happened to be almost matched, which is for me a dog
that did not bark. Is that normal, accident, or what?...

Slainte,

Jim

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