Paul, that's an interesting phase plot! Although it's probably hard to completely rule out a contribution from TX oscillator drift, the 3.5-cycle day-night change seems quite plausible. Attached is a
Paul and Markus, Critique on the sigs are most welcomed. Getting a decode from Paul on a dead preamp is very satisfying! Lets do a repeat of last night's 8 s 2c starting in 5 mins. 73 Joe VO1NA Paul,