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I just got off the air with a couple guys who reported some difficulty getting Force 12 linear loaded 40 meter elements to tune easily. One OM had the EF140S added to a C3SS. The other had the EF240S as a separate antenna (although it was mounted above, not below a C3...problem?). Both reported tuning jumper settings being much further from the spreader than recommended in the manual. One guy reported having to add another turn to the hairpin match. The GOOD NEWS is that both reported performance being worth the effort! My question to EF140S derived antenna owners is what jumper setting did you find successful and at what tower height? How about the hairpin match; any modifications aside from squeezing or stretching? Also, I will probably have an antenna analyzer available to me. If you have used one to tune up an EF140S, did you use it at the end of a long coax run or using a short piece of cable. As a side note, I'll have my C4XL about 15 feet above our second story roof, fed through CAL/AV baluns and a little over 115 feet of RG213. Any suggestions would be welcomed. 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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