I had problems with the stability of fldigi combined with jpskmail on Windows. The frequency (RX) went up and down uncontrolled. Rein PA0R gave me some tips and they solved the problem. Go in Fldigi (here 3.12) to configuration > Modems > PSK > General AFC behaviour on 10 Hz and 6 dB Modems > PSK > Mail > Use sweetspot ON and server search range on 10 Modems > Misc > Sweet spot PSK on 1000 and Always start ON Good luck, see you on pskmail (PS: PA0SON-4 server now QRV on 7048) 73 Paul PA0SON