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>Both, was going to put them on a stack master so I could choose which >configuration. I want to be able to use them in a run configuration for >contesting and also have different take off angles for DXing. Then I agree with WN9O. Essentially, you have one C-3 too many. Best compromise spacing for 20-10 meters with a C-3E (by all means get the reflector) below a C-31XR is 28-32 feet. I would run 70/38 or so with the C-31XR on top, and be sure to do as Kevin suggests and adjust the length of the lines to the stackmatch to compensate for the feedpoint offset. He has already done the math. Something I'be been wondering about, though, is what would happen if you took the 20 and 15-meter elements off a C-3E and used it as a 3-element 10-meter beam , situated between the two tribanders. The 15-foot spacing should be better for 10, where 28-30 is a bit too large for good pattern. You'd have to work with the phasing issue again, though, and model it first. 73, Pete Smith N4ZR Contesting is ... Extreme Radio The World Contest Station Database is back up and running at http://www.qsl.net/n4zr -------------------------------------------- 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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