This is likely a mode developed for moonbounce/meteor scatter that some have been using on HF to see another hams callsigns and signal report with weak signals. JT-65A perhaps?
73, Rick, KV9U grwescom wrote: > OK, I give up. What is the slow MFSK I am seeing on 20 meters lately. > It idles at the lowest frequency an looks like there may be around 16 > frequencies used? > > Gary N0GW > > >