I believe that sleeve is ground, ring is TxD, and tip is RxD. Wayne or someone else will correct me if I'm wrong, I hope.
73 -- Matt N3AR > On Feb 7, 2026, at 2:56 AM, Stefan Jansen via Elecraft > <[email protected]> wrote: > > Hi Wayne, > > Maybe you remember me, we had a talk at the Ham Radio Friedrichshafen in 2025 > and I asked you about the morse UI for the KH1. > > Now I would like to come back with another question about the USB cable for > Elecraft KX2/KX3/KH1. I would like to know how the RS232 signals are mapped > onto the 3.5mm plug. I know that RxD and TxD are on the tip and first ring. > Which one is what, and is TxD and RxD from the computer’s perspective or from > the transceiver’s? > > Sorry for asking, but I couldn’t find out this in text form in any > documentation. > > > Vy 73 de Stefan, DK7STJ > > -- > Stefan Jansen *** E-Mail: [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] ______________________________________________________________ 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]
