Elliot asks: >>Oh wait, that wasn't his web site you gave in your reply. What is it? http://www.btinternet.com/~g4fgq.regp/#S102 Very nice and easy to use programs. The one related to the original topic is " vertload", but there's lots more there, too. The only difficulty for U.S. hams is converting the metric dimensions and wire sizes. 73, Tom AA1NZ