[Elecraft] RS232 DEVICES VIA KIO3B BOARD

[Don Wilhelm]

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.
>