As a longtime user of many conversational digital modes, VarAC addresses many of the shortcomings of those other modes. For me, the single calling frequency per band now followed by an automatic QSY is a powerful feature of the system architecture. However, this unique feature brings with it a challenge.
I have been sitting here for an hour (maybe I need to get a life) watching the 20 meters VarAC calling frequency on my SDR radio. I am hoping to be able to either hear or send a CQ that will start a QSO. However, there is a 2 kHz wide digital signal running S9+ centered on 14.107 that obliterates the VarAC 500 Hz wide 20 meter calling frequency. There are lots of open frequencies above and below but a QSO can't be started because the calling frequency is clogged.
Maybe Irad or somebody smarter than me has a suggestion for a work around.
Larry
W6LVP
Try another band? 15-10M has been really active.