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On Tue, 21 Sep 2004 13:40:31 GMT, Ken wrote:
What options do I have in bringing a longwire antenna and tuned counterpoise ground to my tuner -- in addition to using the terminals provided? Let me restate the question. The antenna is more properly a random wire. The counterpoise is a multiband counterpoise made of rotor cable with a separate [folded] resonant path on every ham band of interest (here, 80 and 60/160) Most sources say a random wire antenna is a dipole with one leg being ground. Iam trying to apply this principle. If my ground is instead a resonant [half wavelength] multi-band counterpoise, Why can't this be treated like a balanced antenna? I would like the random wire to leave my attic for a 225 ft [horizontal] run through the trees and for the counterpoise to hang down along the side of the house, leaving from the same spot in the attic. It seems to me that connecting these two leads to ladderline should be the same RF-wise as if I had a standard dipole there -- albeit with 50% less efficiency. The ladderline would run 50 ft to a tuner. I am not sure whether to use the balanced antenna terminals (thereby involving a built-in 4:1 balun), or the random wire terminal and ground. If I am missing something, I can't figure out what it is. If I am onto something, Does the counterpoise have to resonant? Can it, too, be a long [folded] wire? I understand that in some vehicular apps, the counterpoise is made this way. I am interested in knowing how RF hot the ladderline will be. It would be best if it worked the same way it works with a standard double zepp -- with each leg's RF cancelling out the other. Ken KC2JDY Ken (to reply via email remove "zz" from address) |
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