The signal on 138.83 was detected again last night, first seen at 1600Z,
very strong from 1800Z through till sunrise here using only QRSS3 settings.
The bursts of data on the space frequency were also seen. Using a 100Hz
bandpass filter in Spectran gave good audible copy till well after sunrise.
Unfortunately my wav recording included the unfiltered signal for some
reason.
I'm not sure about the technicalities but this signal appeared to be 60dB
above the dark background bits in argo set to 60 second dots.

Mike ZL4OL