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On Tue, 28 Jun 2011 11:27:24 -0700, "Wayne"
wrote: Thanks for the comments Richard. Indeed, the EZNEC model that I looked even created a question of which direction was best for a 4:1 "balun". That would require more examination of the data than I have yet done. Hi Wayne, The Hail Mary I spoke of also includes: requirement to have a tuner at the driving end of the feedline Kind of a belt and suspenders solution which in the long run makes this purchase an expensive option to simply buying staged tubing. In that respect, the only value added could be a decent mount.... My interest would be in a half sized version of the antenna (or less) for 20m and above. Hmmm, sounds like you are a prospect for my suggestion of staged tubing. I have a pretty good ground available in the form of a metal patio cover. And I would presume this to mean an elevated vertical design - good. The no-brainer approach is to use full sized 1/4 wave radiators for various bands. There's no obvious advantage there when you have to use a tuner anyway. They would be helpful in taming the mismatch, so go ahead. But a simple way of tuning a single radiator for multiple bands is more appealing, since band changes are much simpler. Look into the topic of "folded monopoles." 73's Richard Clark, KB7QHC |
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