Hi, I’ve been trying to make my Digirig+truSDX work on VARA HF Winlink, but had been unsuccessful so far. The issue is which radio should I use for the settings. If I use Kenwood Amateur or Kenwood TS590S radio models as in the truSDX forums, the radio goes into TX mode immediately when I open a session of VARA HF. Not sure now which radio model to use.
Here is my VARA HF radio settings:
If you only have audio cable connected then radio selection (CAT) should be set to “none”.
The important part is PTT configuration which should be set to RTS of Digirig’s serial port.
Unfortunately, there is no “none” option for Radio Model selection. The closest there is “Manual”.
For the PTT port, would “External” be correct?
Nope that didn’t work either 
I posted my response in another thread:
Rather than set Control Port, set PTT Port parameters, as I have shown in the previous linked post. Good luck!
73 Constrainted