The EDM Group completed a very active nationwide exercise on Saturday, March 25 utilizing VarAC as a "call-up" tool to locate and activate EDM Target Station Team members that might be available for HF P2P Winlink messaging after a major disaster had rendered the Internet, Cell Service, repeaters, and virtually all other infrastructure useless.
We collected over 100 pages of logs from participating stations and will be analyzing the resulting data for future planning.
One thing I noticed is that after several hours of operation, VarAC no longer reliably keyed the transmitter. It would drop out of transmit mode before starting the "send" sequence. When switching to other software (noticeably WSJT-X) the problem disappeared. Any thoughts?