Is it possible to use the KXUSB for remote control (e.g. HRD) of the K3 (RS-232 interface) The 3,5mm jack has only 3 contact rings, i suppose RXD, TXD and Gnd. If it is not possible to use a "jack to DB-9 converter", would it be possible to cut off the jack and install a DB9 connector? What is the wire colour coding in the cable? 73 de OZ4UN Paul