On May 10, 4:14 pm, Owen Duffy wrote:
Owen Duffy wrote :

What have you done to make the 259B appear as an isolated impedance
meter?

I did mean to add that in this case, the impedance at the end of the
isolated feed line is not necessarily (and not likely to be) the same as
when it is connected to your transmitter. Again the same issue arises about
the path to ground for common mode current, and the influence that has on
the antenna feed point impedance transformed by the transmission line.

You need to think about the purpose of the measurement.

Owen

Owen I am operating the 259b on battery power and keeping the meter
away from all conductors including myself (hands). I have searched
posts on the internet about using unbalanced analyzers to measure
balanced line input impedances with little success other than one post
which spoke to the need to measure impedance in 3 connection
configurations and then mathematically solving for the final impedance
value. The 3 configurations were balanced line lead A to ground with B
gounded. B to ground with A grounded. And A &B connected together to
ground. (Ground was defined as the common on the analyzer.) The author
then mentioned some mathematical determination of impedance which he
didn't elaborate on. Are you familiar with this method? What is the
mathematical solution once you have the data?