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![]() Here's a simple formula to save you money since I've heard that same roll of wire is now around $45! No matter how long your radials are, put the ends down such that they are ~0.025 wavelengths apart on the highest frequency band you plan to use. On 160 this is ~13', on 80 6.5' and on 40 3.25'. This works out to about 63 radials total if they are all 1/4 wavelengths long in a circular configuration, but the formula also works for random lengths in non-circular configurations. The idea is to have the end points no more than ~0.025 wavelengths apart. While ON4UN's book suggests 0.015 wavelengths apart, some recent measurements by N6LF seem to indicate that may be overkill (i.e. 60 radials are within a few tenths of a dB of 120 radials). http://www.antennasbyn6lf.com/files/...asurements.pdf 73, Bill W4ZV At $45/500 feet it is still a long way from Cost prohibitive. Do I misunderstand? My intuition is to place the radials I use over as much area as I can. The way I read your note is that they should be installed in a small sector... I think I am misunderstanding that point. Also, on the distant planning horizon I will likely use the Radial field for a permanent Multi band Vertical. The current 28 foot radiator is simply a convenient place to gain experience. I am inclined to pursue the advice presented in the article http://www.ncjweb.com/k3lcmaxgainradials.pdf John Ferrell W8CCW |
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