[Elecraft] K3(s) SteppIR control

[Andy Durbin]

"The information sent by the K3(s) is needed, hence the need to connect (somewhere) to TXD info from the K3(s). "

I suspect that signal name "TXD" may be being misused in this discussion.  Having been caught by this I prefer to use the terms "data out" and "data in".

On a TS-590S COM port pin 2 is designated "RXD" and is the data output. COM port pin 3 is designated TXD" and is the data input.  I would expect K3 pin designations to be the same.

As has been pointed out - two RS-232 transmitters should not be connected together.  Multiple RS-232 receivers can usually be wired to one RS-232 transmitter.  This is the scheme typically used in a "Y" cable.

73,
Andy, k3wyc