Has anyone tried receiving PSK-31 on an R390A? If so, how did you feed the sound card? I was thinking of using the Line Output, but I don't know the impedence of the typical soundcard? Are they lo-Z, hi-Z? Would it matter all that much for PSK-31? Would I be better off using the diode-load? I assume the R390A will be stable enough for the task, but I don't know. Looking for advice. 73, Barry - N4BUQ