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On Tue, 29 Jul 2003 10:12:16 -0500, W5DXP
wrote: nbr wrote: When I get into these antenna mysteries, the thing for me to remember is to focus on where the likely voltage and current points are on the element(s), and from there I have a better chance of prediciting the characteristics of the antenna at a given frequency. Otherwise it's pure voodoo. (I need to tattoo a couple graphs on my hand.) You could probably learn a lot by using a modeling program like EZNEC, which is available in a free demo version at http://www.eznec.com You know, I've been meaning to do exactly that. A few years ago tried a free demo (might have been early version of EZNEC?) and was scared away from it because I found it extremely difficult to input the antenna data....a simple dipole in free space was no big deal, but the oddball antennas I like to experiment with (goofy lengths, bends and angles,(in real world environment...near tower, metal barn etc.!) were practically impossible to input.Garbage in, garbage out. Will give it another try. Tnx & 73 Dan (K0DAN) |
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