RF caused communication problems are quite common, especially with USB connections. A pretty conclusive test is to try it while transmitting into a dummy load. If it only fails with an antenna, then it's probably RF.
Victor 4X6GP On Fri, Feb 13, 2026, 19:17 Jeff WB0M via Elecraft <[email protected]> wrote: > Hello All, > > A couple of times ny K3S has quit communicating with my MacBook Pro and > macMini. For some reason, it no longer “talked” with any digital logs or > digital programs. > > When I launched the K3 Utility, it would not see the K3S - or more > precisely, the port used by the K3S. > > I replaced drivers in the computers, unplugged and replugged cables, > added a new USB to computer cable (thank you Elecraft) and still nothing > worked: Until it did. > > The last time I got it to work I also turned on the P3. I was about to > order a RS-232 to USB cable, but the K3S and the K3 Utility started > communicating. > > Once K3S started communicating, I reloaded all the K3S software and and > have also added chokes/toroids to my computer cables. I do know there > is/was a bit of RF floating around the shack. > I’ve also checked and re-tightened any grounds wire. > > Has this happened to anyone else or does anyone have any other suggestions > to keep this from happening again? > > > Tnx es 73, > Jeff/wb0m > > ______________________________________________________________ > 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]
