Hi Alan and LF group,

yes, exactly the same observation on CFH here in Nuernberg.

To cope with the current high level of QRN, I have now implemented a special 
averaging strategy: Each column in the final spectrogram is a 15-second 
weighted power-average of about 500 10.8Hz-resolution FFT's. The weight factor 
applied to a single spectrum is taken proportional to the inverse square of its 
total power. In effect, this type of averaging strongly prefers the quiet 
periods, and practically clears out the crashes.

73 de Markus, DF6NM



Alan Melia wrote:

Hi all despite a definite "switch-off" at about 2400z on the 12th, I was sure I 
saw a weak FSK trace on ARGO at about 2320z last night (13th) My logger was started but 
the plot is wery weak. The line definitely seems to be above the noise, but at such low 
levels I cannot be sure that I was not measuring something else.

Can any of the N.American stations confirm activity of CFH last night?? If this 
is confirmed, this is by far the lowest signal level received, and there is no 
history of them ever running a QRP mode.