K9YC's grounding and choking methods are one part of the solution. The other is reducing the amount of RF flowing on your station equipment. Off-center fed antennas and verticals often produce common-mode currents on feed lines. Changing the feed line length away from odd multiples of 1/4 wavelength helps, although you can make the situation worse on one band while improving it on another. Antennas should have chokes or baluns at the feed points, and it may help to also have a choke where the coax comes into the shack. Take care not to ground the feed line on the antenna side of the choke, because this 'shorts' it, rendering it ineffective.
Vic 4X6GP/K2VCO > On Jun 15, 2015, at 11:33 PM, Don Latham <[email protected]> wrote: > > I'm trying to use a Rigblaster plus with my K2 with 100 watt amp and tuner. > I've also tried a MFJ TNC switch. Both for digital mode and microphone > switching. When I use these devices I get interference when in mic mode from > rf pickup. With the mic alone., no problem. Has anyone out there had this > problem? I've tried ferrite chokes on all lines, routing the cables in > different places, etc.etc. I'm totally stumped and very disappointed that I > have to manually replug everything to accomplish a simple (?) switching task. > Anyone out there faced this problem? Any advice? > Thanks > Don > > > -- > "Noli sinere nothos te opprimere" > > Dr. Don Latham AJ7LL > Six Mile Systems LLC > 17850 Six Mile Road > Huson, MT, 59846 > > mail: POBox 404 > Frenchtown MT 59834-0404 > > VOX 406-626-4304 > CEL 406-241-5093 > Skype: buffler2 > www.lightningforensics.com > www.sixmilesystems.com > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
