On 4/23/2020 7:40 PM, VE6WZ_Steve wrote:
Tom,
Yes.
Just sweeping from the end of the coax in the shack should show the same dip of
R at the correct frequency.
(The absolute R value (in Ohms), and X value will not be correct because of the
feedline transformation, but the frequency of the R dip is ONLY a function of
the reflector tuning.) Try it and see.
I don't see how this would be true for an arbitrary length
of coax, especially if it is an odd multiple of a quarter
wave. For example, if the load on the far end changes
from 50 ohms to 25 ohms, the analyzer in the shack will
see resistance INCREASE from 50 to 100 ohms. A line with
electrical length of 55 degrees will have a resistance
at the shack of 50 ohms whether terminated in 50 ohms
or 25 ohms.
73
Rick N6RK
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