DSWMULTI v0.76 may be downloaded here.
A required freeware file, courtesy LOGIX4U.
The Visual Basic runtime file named MSVBVM50.DLL ... included with MS Windows 95 thru XP... is also required.
Click here to go to JE3HHT's MMTTY Ver. 1.65B download page.
Have a look at the world's first DSW-20-RTTY QSO!
Here's my second RTTY QSO using the DSW-20-RTTY rig.
My first DX contact using the DSW-20-RTTY rig!