Rick, Like everything else "It all depends"...
In your particular case, it depends on how the elements are oriented - and that includes the counterpoise. It also depends on the proximity of ground and other objects. Is the counterpoise in the air, or is it laying on the ground? That is the stuff that antenna modeling is made of - but modeling has limits if you do not feed it proper information, a wire isolated in space behaves differently than one 20 feet off the ground. Often it is easier to just put it up and measure it - an electrical halfwavelength of feedline will repeat the feedpoint impedance of the antenna, so yes, you can use your antenna analyzer to measure it with the antenna in the air. 73, Don W3FPR > -----Original Message----- > I wonder if an end fed half wave antenna is a high resistance if a > counterpoise is used. This actually would look like a 3/4 wave (with a > quarter wave counterpoise) offset fed antenna with no feedline. > This would > be a resonant antenna with a few hundred ohms at the feedpoint. > Most of the > radiation should be from the half wave section so should be an efficient > antenna. > 73 > Rick Dettinger > K7MW > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
