HI, can you confirm that the KXUSB uses TTL signal levels rather than
standard RS232 levels? I got an extra one with my PX3 and repurposed it to
talk to a GPSDO that requires TTL serial levels and it seems to work fine.
I just put a 3.5mm TRS jack on the GPSDO.

73,

Mark
W7MLG


On Mon, Aug 6, 2018 at 8:01 AM, Don Wilhelm <donw...@embarqmail.com> wrote:

> Hans,
>
> Do not connect a standard serial cable or a USB to serial adapter to the
> K2 AUX IO connector - keep in mind that it is not labeled "RS-232" for a
> reason.
>
> Yes, you can make an adapter to connect the KXUSB to the K2.  A 3.5mm jack
> and a DE9 male connector as well as 3 wires are needed.
> Connect the KXUSB tip to the DE9 pin 3, the ring to pin 2 and the Sleeve
> to pin 5.
>
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