Hi Mike,
I am using a "real" serial cable for COM1 for my K3 Twin setup. The CAT works with any other
product I tried it with, e.g. TRX-Manager, Win-Test, HRD, etc., but not with the K3 utility.
I understand from you that one must switch to the USB virtual COM1 port to make it work,
which seems a bit strange. I wonder why?
73,
Mitch DJ0QN / K7DX