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taking it to a vertical position with the reflector near or on the ground. We strongly discourage this manner of tuning as the presence of ground (a giant capacitor) may at best detune those elements in exact proximity to the ground. At worse, the reflector may be entirely removed from the antenna circuit. A much better method would be to take the antenna up the tower to about 20'. At this height, you will be able to see what is happening as the affect of ground is the same for all elements. You may be able to see meaningful results at a lower height too depending on the composition of the soil underneath the array. We do talk about the fallacy of tuning a HF array by turning it vertical in our document called Debugging An Antenna, available on our web site. 73 Natan W6XR Force 12 East Ithaca, NY FN12sk force12@qth.com -------------------------------------------- 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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