> "This is why wide broadcast towers, even 1/2 wave tall towers, can have >reasonably low impedances at the base.²
Agreed. I have found it very difficult to model accurate complex base Z measurements of wide broadcast towers (i.e., low height/diam. ratio) that are of the 180-195 degree variety - even with NEC4.2. This is one of NEC¹s more significant limitations. In some of these cases, lighting systems and any STL transmission lines play a part in the true base Z. Still, I routinely get results that show much higher base Z in the model than actual measured base Z results. Paul, W9AC _________________ Topband Reflector Archives - http://www.contesting.com/_topband
