I am running Winlink Express and VARA FM using Wine 9.0 on Ubuntu 24.04. VARA FM shows signals on the waterfall, and triggers PTT on my Yaesu FTM-400 using either a SignalLink (using VOX), or a Digirig Mobile (using a COM port). Since the SignalLink performs PTT using VOX I know there is audio coming in/out to the radio (there is 40W coming out but I have no easy way of checking the FM modulation.)
The problem is that no Winlink station responds to my transmission. If I switch the Linux laptop for a Windows PC then a local station immediately responds using VARA FM, so the problem is on the Ubuntu laptop, not with the cables, Signalink, or Digirig. FYI, VARA HF works fine on the Linux laptop using the USB cable from an ICOM 7300.
Any direction on where to start is greatly appreciated.
Ron/K2RAS
