Sometimes, a line or cable is just the right fraction of a specific wavelength to act as an efficient antenna, and RF will find it's way in.
With the digimodes your soundcard is involved, so if you're getting a 'funny noise', that's where I'd look - 73 and good DX de Mike, K6MKF, NCDXC Secretary > -----Original Message----- > From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> > On Behalf Of David Haines > Sent: Thursday, August 27, 2020 10:32 > To: donw...@embarqmail.com; elecraft@mailman.qth.net > Subject: Re: [Elecraft] KX3 radio settings for WSJT-X > > Don: > > Problem goes away when I reduce to 20W, the maximum for my dummy load. > I just put ferrites on mouse wires, keyboard wires, and sound wires and > nothing > changed. I guess I could add more, but ... . > Maybe my best solution is to go to wireless mouse and keyboard. I > intentionally > used wired because my cybersecurity son is against wireless... . > > Still doesn't explain the funny noise from the KXP100, does it? > > david KC1DNY > > On 8/27/2020 1:20 PM, Don Wilhelm wrote: > > David, > > > > As someone else suggested, it sounds a lot like RF feedback on 17m. > > Try operating into a dummy load to see if the same thing happens - if > > not, get out the ferrites. > > > > 73, > > Don W3FPR > > > > On 8/27/2020 12:41 PM, David Haines wrote: > >> > >> Here are more details: > >> > >> All seems to be working fine on 160m-10m except for 17m, so KX3 VFO > >> is at 18.100 for the rest of this discussion. > >> > >> Without WSJT-X running, ATU finds a 1.1 match and TUNE button on KX3 > >> works as expected. > >> > >> With WSJT-X running, using the WSJT-X TUNE button causes the following: > >> > >> 1. KXPA100 power LED's light from left to right _twice_, in > >> synchronization with a musical ringing that rises in frequency, then > >> settle down quietly to about 100W. > >> > >> 2. Around the same time Windows reports "USB device not recognized" > >> and the mouse cursor disappears. At this point different things can > >> happen: Maybe the cursor comes back and I can stop the TUNE at > >> WSJT-X. Maybe it doesn't and I have to shut off the KX3 with XMIT > >> button. Sometimes the PC freezes and needs a hard reset. > >> > >> > > > > ______________________________________________________________ > 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 Message > delivered to mike.flow...@gmail.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
