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>Ken, > > Pleasure to meet you and to receive your factual input on the actual >construction of the Force-12 balun series. Are you active and maybe we can >QSO sometime. > > Was wondering what the source of your information about the construction >of the Force-12 baluns.? And what theories do you hold regarding the >application of baluns to the antenna questions that have been posted? > > I do wonder what your theories are about the application of the coiled >coax, or "Badger" balun, to multiband antennas? I believe that these higher >Q baluns may have entirely adequate common mode impedance to decouple >feedlines from antennas with low feed point impedances throughout the entire >HF range of bands.. However, the wholesale application of these coiled >baluns to all antenna applications could be a mistake. Yes, these pieces of >transmission lines won't overheat or show visible thermal stress. But, they >may not function as effective baluns on all bands due to their higher Q and >limited bandwidth compared to the low Q bead balun. John et al -- if you refer to the Towertalk archive on contesting.com you will find a very interesting discussion of the impedance exhibited by various forms of coiled coax chokes, supported by careful measurements with professional equipment. As I recall, a key conclusion is that simply bundling the coax significantly reduces the impedance, but that a single layer solenoid-type winding can produce quite adequate performance if enough turns are used. 73, Pete N4ZR Contesting is! The World Contest Station Database is waiting for your input 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 |