Guy: Very interesting.... Some of your comments were verified in a recent QST article.
Mar 2010 - QST (Pg. 30) An Experimental Look at Ground Systems for HF Verticals The author experimented with resonant vs nonresonant radials on the ground and found performance improved when the radials were cut to electrical resonance vs just measuring them with a tape. Given this, it stands to reason that if the same radial field is used by a multiband vertical on a higher frequency, the high current point would be at some distance from the antenna's base thus reducing efficiency. Now here's the question.... Folks assume ground radials to be (non resonant) but that isn't the case. So what would be the best solution for a multiband antenna with ground radials? Well if we follow this idea, we would need multiple 1/4 wavelength radials for each HF band for best performance. My inverted L is 50' up and 150' out. I use a separate elevated counterpoise for each band. I've found that a ground rod and some buried radials have virtually no effect. I just use them for lightning protection. Steve N4LQ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
