Hello Markus , Lubos ,
Markus Vester a écrit :
... the strong noise bands were caused by Luxembourg effect
(ionospheric crossmodulation) from a strong LF or MF broadcasting
transmitter onto the DCF39 carrier. When the "heater" is modulated by
music, the spectrum often shows distinct bands related to the tones of
the musical scale. Attached is a grabber snapshot just after 2:10,
with DF colours rotated to bluegreen. The band near 137.78 kHz is
clearly visible.
huummmm ! Markus , I do not think that it is of “ Luxembourg effect”
because at the same time when Lubos and me
noted the phenomenon, I were in direction of 295 ° (the USA) in this
direction I never noted of “ Luxembourg effect”
I thus think that it came besides !!!! ??????
Despite some distant QRN, very good signals from XKO and WD2XKO were
visible through most of the night, with the last "J" coming through as
late as 9:15.
Here I copied it until passed 9:30 ( see on my grabber )
Markus, DF6NM
Have you could see your signal on the grabber of Laurence in China ?
73 qro Jean-Pierre f1afj
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