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> My questions for the listserve are: Has anyone tried a C4 > class antenna on 30m? Yes, however, I use the 40 meter element which is "closer" to 30, than the 20m element. I do not use the internal tuner of my 1000D, leave it OFF. I use an external tuner, with the output C element at maximum capacitance. This insures highest efficiency in this situation. I have a separate feedline up to the EF-140S 40 meter rotating element. The tuner input capacitor is meshed only about 20%, 70 pf, and the inductor is set to about 0.6 uhy. Resulting swr is 1:1 as far as the rig side of the tuner is concerned. No problem radiating about 175 watts using my D at around 10106 kHz with this set up. Get very nice signal reports from wherever. I assume the radiation pattern is less than dipole level gain; that is, that the pattern is closer to circular than cardioid -- just my guess, as I have not noticed much delta when rotating the 40 meter EF-140S element when operating on 30 meters. Good luck and 73, Jim, KH7M On the Garden Island of Kaua'i -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |
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