Hi Peter, LF, thanks for highlighting my marginal traces in your screenshots. Yes your start and stop times are correct, the TX was actually on air from 7:45 to 13:45. I use almost the same setup as
After a 12 hour countinuous carrier transmission, I finally switched off Monday 20:00 UT. The signal had been accurately on 8270.020 Hz, with a few exceptions as indicated here: 7:55 start, 7:55 - 9: