Ever tried to work SO2V using this trick? You’ll no doubt have run into the problem that windows doesn’t want you to share a serial port between 2 programs.
So, when working SO2V with N1MM and 2 instances of MMTTY it is not possible to connect the 2 MMTTYs to the same FSK interface through software.
All you need is 2 com ports (one for each MMTTY instance) and 4 diodes.
Don’t forget to work me in next RTTY contest!