Thinking again about this, we have missed out a stage. After measuring the
tuner output impedance, we need to make a temporary L network which, when
terminated with 50 ohms, looks like the antenna. Now put the MFJ on this
terminated network and measure it's R +/- jX values which will represent the
antenna.
73
Tom G3OLB
WO0W wrote: <Perhaps you can take a portable transmitter and manual tuner to
the site. At the point where you wish to place an L network, attach the manual
tuner and transmitter and adjust the tuner for a good match. Take the tuner
away from the source of interference, put a 50 Ohm dummy load on the tuner
input, and measure the impedance on the tuner output with the MFJ-259B. I
believe that should be close to the value of the impedance of the antenna that
was measured, with little or no affect from the strong broadcast signal.>
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