[Elecraft] [K3] splitting RS232 output for 2 serial ports

[iain macdonnell - N6ML]

On Tue, Aug 7, 2012 at 2:38 PM, John Shadle <shadle at katzenfisch.com> wrote:
> Hi all,
> I'm trying to accomplish keying with my K3 using the RS232 port and a
> COM port on my desktop computer.
>
> I currently use the RS232 for station logging to provide frequency,
> mode, etc. information and for rig control (e.g., click on a spot and
> then the radio changes frequency/mode). Unfortunately, the program I
> use (AC Log by N3FJP) does not allow you to choose the same COM port
> for both rig control and CW keying.
>
> My question is whether or not I could use a splitter of some type (at
> the K3) to go to 2 separate ports (e.g., COM 1 and COM 2), then use
> COM 1 for rig control and COM 2 for keying. Has anyone else done this?
> Is this acceptable practice?

Sure! It'd probably be safest to make the splitter yourself - the
"rig-control" side needs TXD, RXD and ground, and the keying side
needs RTS, DTR and ground.

73,

    ~iain / N6ML