[Elecraft] Question on ACC plug for KX2

[Matthew Kaufman]

Someone emailed me direct - my information was for the KH1, NOT the KX2 - I mistakingly read the email as looking for the KH1 info because of that first sentence, but your subject is for the KX2.  Check the KX2 manual, page 9, for the KX2 pinout.

Sorry about that!

73

-- Matt N3AR

> On Feb 7, 2026, at 5:16 AM, Matthew Kaufman <MATT.D.KAUFMAN at GMAIL.COM> wrote:
> 
> 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 <elecraft at mailman.qth.net> 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: DK7STJ at darc.de
>> 
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>