Since the is the most recent thread for Loudoun system discussion, I'll mention here that 2939 is being used today by LCSO and Purcellville PD units. I saw some unidentified radio checks too. They are referencing a 'command'. I believe it's being used for holiday events in Purcellville to include the parade at noon.
Leesburg's parade will begin at 6pm. I'll be in the front end of that.