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Hello LF,
here is another screenshot of yesterday's excellent
signals from the Russian triumvirate. I have colour cycled the RDF grabber
image 120 degrees clockwise for better visibility (northeast =
yellow).
The "YO" signal was generally the strongest here.
It was accompanied by a pair of strong 100 Hz sidebands, and a weaker,
variable 50 Hz component (see small image 0:00 to 4:00 UT, 250 Hz high).
These could either be due to residual FM (perhaps caused by hum on a VCO
control line?), or deep AM by a possibly faulty power supply
filter.
Kind regards,
Markus,
DF6NM in JN59NK
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