Topband: Antenna analysers in close proximity to BC station

[Tom Boucher]

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.>