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I have a Force 12 C4EXL (a C4XL with the optional 10 meter reflector) on a 40 foot roof tower. Overall, performance is great. However, since installation, the 40 meter 2 element bean section has worked only intermittently. This situation has worsened after nearly a week of rain. What happens is that intermittently, the antenna shows high (4:1) SWR when power is applied. It always shows "good" on my MFJ 259B antenna analyzer. Much of the time, I can use my FT1000MP barefoot without problems. Running an amplifier is generally out of the question. Right now (hasn't rained for 6 hours) , it won't even handle the exciter. My suspicion is that the extra 10 meter element is too close or possibly touching one of the linear loading wires. I did put rubber tape around the linear loading wires in the vicinity of the 10 meter element before putting it up, because to me, they looked too close for comfort. I have been unable to go up and inspect the installation so, my report is admittedly preliminary. Any ideas? Thanks. and best 73, Bill / K8DXX -------------------------------------------- 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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