Kent,
You should be able to plug the Palstar cable into the cable from the K3
RJ-45 to RS-232 dongle. A gender changer may be needed.
Worth a try anyway.
Or you could purchase a short RS-232 Crossover cable to replace the one
to the tuner.
73,
Don W3FPR
On 7/10/2018 12:10 PM, KENT TRIMBLE 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.
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