That¡¯s not the same on a 7300. You don¡¯t need an external circuit. I just set my 7300 up on MMTTY last week. Just needed the USB port and the EXTFSK64 DLL. Plus the right settings in the rig.
Tom NY4I
Principal Solutions Architect
Better Software Solutions, Inc.
727-437-2771
Tom Schaefer - NY4I