Had my first VarAC QSO today on 40M using my lab599 TX-500 with a DigiRig interface to a Win10 laptop. Power was 4W but since I live in a building and have a 100' run of coax to my 5 band vertical I have no clear idea of how much power makes it out. Anyway, had a 16 minute QSO with a station in TX (I'm in Colombia, South America) with perfect copy. Time was around 6AM.
In the past I've done almost all the digital modes but I like the ones I can chat on. This one fits my needs for human2human communication using an excellent digital mode. This is better than ROS which I supported way back and even got some friends to use.
Hope to learn more about this mode and use it when portable also. Best regards. Hope to contact you in the future.