Either plug the two cables together or with a “GenderChanger”. Sent from my iPhone ...nr4c. bill
> On Jul 10, 2018, at 12:10 PM, KENT TRIMBLE <[email protected]> wrote: > > The RS-232 thread comes coincidentally at a time when I have just experienced > an RS-232 "gotcha." > > If you own a Palstar AT-AUTO you need to remember that the RS-232 cable (null > modem) originally supplied with the tuner is cross-wired (pin 2 to pin 3, and > pin 3 to pin 2). This is the correct wiring that allows the tuner to follow > frequency excursions by the K3. > > Recently I returned my K3 (sn 21) to Watsonville for hardware upgrades that > included replacing the KIO3A board with the new KIO3B board (now standard on > the K3S). However, this new board no longer utilizes a DB-9 connector for > RS-232 functions, but instead uses a female RJ-45 socket for RS-232 > functions. This now renders obsolete the original DB9-equipped cable that > came with the AT-AUTO. Fortunately, Elecraft includes with the upgraded > KIO3B board a pre-wired 30-inch RS-232 cable. This cable has an RJ-45 plug > on one end and a DE9S plug on the other end. Unfortunately, this cable is > wired straight-through . . . no cross-wiring . . . which means no QSY > following by the Palstar. > > After spending more time than I care to admit in testing cable continuity, > serial baud settings, and configuration menus in both the K3 and the Palstar, > I suddenly tumbled to the fact that the Palstar cable is cross-wired while > the Elecraft cable is not. > > Home-brewing a new cable with the proper wiring now permits the AT-AUTO to > follow band and frequency changes in the K3. Unfortunately, the Elecraft > cable uses molded connectors which prevented an easy and quick fix. > > Just a tip for those who own either the original Palstar AT-AUTO or the newer > HF-AUTO (which I presume is wired the same), or for anyone using RS-232 > peripheral devices who want to upgrade to the new KIO3B board. Those > pin-outs in the manuals are there for a reason! > > 73, > > Kent Trimble, K9ZTV > Jefferson City, Missouri > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
