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However, the relay box was installed and the driven element resonance was adjusted up. I could not reach far enough to access the far end of the shorting bars and didn't feel like rotating the antenna down by myself, so only the near end shorting bars were adjusted as far as possible toward the element tip. This resulted in resonance at about 7.210 MHz with relay on and 7.140 MHz with it off. Unfortunately the VSWR is very high in both cases: about 3.1 and 4.0 respectively. This is the lowest reading obtained by adjusting both hairpin coils (original at antenna and new at relay box balun connection). Now I am wondering if this problem is caused by adjusting only one side of the shorting bars, or perhaps the hairpin on the driven element should be removed, leaving only the smaller hairpin on the balun side of the relay box. Any ideas? Thanks. Keith -----Original Message----- From: Keith Dutson [mailto:kjdutson@earthlink.net] Sent: Saturday, August 02, 2003 12:12 AM To: Force12Talk Subject: RE: [Force 12 Talk] C-4XL Tuning Question [snip] Tomorrow all EHS steel guys are being replaced with Phillystran. The 40 meter driven element will also be readjusted to 7.220 MHz and relay box installed. I will report the results. [snip] -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact force12@qth.com |