I designed the S-BOX for just this type of serial port sharing. It passes all serial lines straight through from PC (normally) to Radio RS232, and taps the RXD line (Pin 2) for the KPA500, KAT500, SteppIR, etc. This works with POLL OFF as long as a logging program is polling the radio properly. It also works in series with the K3S + CBL3PY + P3.
The S-BOX can just as easily be inserted as a null modem cable + tap between TS-890S and TS-590S (and as a Y-cable to the KPA500, with TS-890S Pin 2 connected to KPA500 XCVR SERIAL Pin 2). So, it should work to connect the serial connector of the TS-890S to the TS-590S with a tap, but as you say, if Kenwood only supports that master/slave connection at 115200 baud, as stated in the Kenwood manuals, then neither the KPA500 or KAT500 will be able to track, since they both max out at 38400. FYI, the KPA1500 XCVR SERIAL connector supports all common baud rates from 4800 to 230,400 baud, but the KPA500 does not. 73, Bob, N6TV https://bit.ly/S-BOX On Mon, May 10, 2021 at 12:24 PM Andy Durbin <a.dur...@msn.com> wrote: > "I have a TS-890S that has a KPA500 connected to the radio's serial > port. The amp follows the radio, no problem. Very slick. > > I also have a TS-590SG that I can use as a second receiver for the > TS-890. For this to work right, the sub RX needs to connect to the 890 > via the serial port with a null modem cable and set to a 115,200 baud rate. > > Is there a simple way to get the band data to the amp while the 2 radios > are connected to each other as described above?" > > Does the TS-590SG/TS-890S absolutely have to be 115,200? The KPA500 > maximum data rate is 38,400. > > If the TS-590SG/TS-890S link will work at 38,400 then it may be possible > to pick off IF, FA and FB with a Y cable. I don't know what subset of CAT > commands is used when a TS-590SG is used as a second receiver so it may not > be possible even if the interface does work at 38,400. > > Of course other options are available if an intermediate PC or smart > controller can be used. > > 73, > Andy, k3wyc > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to n...@arrl.net > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
