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

[Don Wilhelm]

John,

I would suggest that you use the "one transistor keying circuit" (Google 
and you will find many sources) for the keying and PTT. Connect the 
output of the one transistor keyer to the K3 rear panel keying input and 
PTT input.

You will still have the problem that the computer will activate those 
signals when the computer boots, so boot the computer and than turn on 
the K3 - or take other common sense precautions like switching the K3 to 
a dummy load during computer boot times.

73,
Don W3FPR

On 8/7/2012 5:38 PM, John Shadle 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?
>
> Thanks!
> -john W4PAH
> Madison, WI
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