> I have had no problems with the data modes all fed directly > from the sound card via the rear line in/out sockets, but I > have discovered that I have significant rf getting in (on 17m > in particular) when I plug my MD-2 into the rear mic input > socket.
RF sensitivity which changes based on frequency, band, cable route and/or front/rear panel is an indication of a common mode RF issue. Changing cables will often move the problem to another frequency or band but the solution is to properly decouple all feedlines as documented by K9YC (and separately by W1HIS). See: http://www.audiosystemsgroup.com/RFI-Ham.pdf and www.yccc.org/Articles/W1HIS/CommonModeChokesW1HIS2006Apr06.pdf 73, ... Joe, W4TV > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Stephen Prior > Sent: Sunday, November 08, 2009 6:59 AM > To: elecraft > Subject: [Elecraft] K3: RFI on pack panel etc. > > > I have had no problems with the data modes all fed directly > from the sound card via the rear line in/out sockets, but I > have discovered that I have significant rf getting in (on 17m > in particular) when I plug my MD-2 into the rear mic input > socket. I have no problems whatsoever when I use the front > panel socket. I have done all modifications as they have > been announced, but I still have this problem. > > In reality of course it's only a minor inconvenience as I can > use the front panel socket but nevertheless the issue still exists. > > 73 Stephen G4SJP > K3 #980 > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
