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On Sun, 20 Jan 2008 09:03:05 GMT, "Lee"
wrote: Yes. Richard, you have it now...i was mainly concerned about the spacing of the foldback from the parent element as i have seen much more exotic layouts using 3 and four foldbacks using 400ohm ribbon feeder for the element which i might try for 80 and 160, but i`ll make those using spaced single wire dipoles rather than utilise a rigid rotatable ten meter dipole and a couple of lengths of wire.. Hi Len, As for going lower to 80M using 3 or more foldbacks (for the simpler dipole) to keep it in your garden. Stick with your mag loops, because it doesn't get any better. Using 3 foldbacks for 80M (and the antenna is too wide for your garden) will give you a 10 KHz bandwidth at the 2:1 SWR points. Making the antenna smaller to fit, drives up the Q. 160M only portends worse Q (from your point of view). A small dipole, like a small loop, either are going to be hi Q if they are to be efficient. maybe i can do the same again for a reflector?? _______________O_______________ [_____________ I _____________] I I _________________I __________________ [_______________ ________________] YOW!!! You are now getting quite elaborate. You can accomplish this, with great care, and if you have the patience to raise and lower this half a dozen times or more to get it right. 73's Richard Clark, KB7QHC |
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