John,
?I have been running Winlink with VARA on my TS480HX for years now without any issues. I also use VarAC and other digital programs with it. I don't have a SignaLink but use a DRA-100 as my interface. My question to you is what cable are you using to interface the SignaLink to the rig? Is it the 13 pin or the 6 pin din for the rig? I know this might be a shot in the dark but thought I would ask.?
JIm Ebner, N8JE
Jim Ebner