thanks Dave. In fact I rather don't know, what I am doing. I just did not want to get an antenna off the shelf and do something homebrew and the DK7ZB conzept looked easy. But hen on the first setup something did not match as predicted so I suspected the? matching stup so I wanted to measure it. Up to now I only have used the NVNA to trimm antennas to resonance.
?
Martin
DK3UW
