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I am using a C-31XR & WARC 2/2, both fed with F12 B1 baluns. The system uses a single 50 ohm feed (~120 ft) with a DowKey six position remote switch (I KW AM rated to 500MHz) at the top of the tower to select the antennas. The switch was tested for SWR & loss into a 50 ohm resistive load, with a Bird, prior to installation and SWR & losses were negligible. I have a straight line run of about 40 feet of coax in the basement before the feed exits the house. If I put a ~200W CW carrier on, and walk along the coax with a wave meter ~ an inch from the coax on 10M or one foot from the coax on 15M, it will "peg" the meter every several paces on 10M & essentially be constant on 15M indicating to me that, I have not choked off the RF as desired. I was beginning to question the remote switch, but have no rational to do so. Anybody out there had a similar experience or ideas? Is there a quantitative test out there to determine the effectiveness of the balun by examining the feedline? What is considered "good enough"? The field strength meter is an old Monarch FSI-2 which uses a 100 uA movement and a simple LC ckt followed by a diode rect. & 10 inch antenna. Frank W9JCC On Sun, 14 Jan 2001 13:39:13 -0800 "John Petrich" <petrich@u.washington.edu> writes: > Pete, > > Absolutely, I agree 100%. Your logic is exactly the reason why > I > believe that ferrite based low Q broad band baluns are THE way to go > in the > majority of high performance expectation antenna environments. I > feel > sorry for some of my friends who continue to live with significant > common > mode current related problems with their antennas because their > belief > systems are subjective and not data driven. Enough soapbox. > > Wish I lived at your latitude and could hear all the DX that I > hear you > guys working these days. Have a nice weekend. > > Regards, > > John Petrich, W7HQJ > > > > -------------------------------------------- > 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 > > ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj. -------------------------------------------- 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 |