Re: LF: Would slower QRSS help?

[Paul Nicholson <vlf0403@abelian.org>]

> ... QRSS 60 last night.

I guessed wrong and Markus suggests a faster
spectrogram.   This one is in 60 second bins

 http://abelian.org/vlf/tmp/29499_140302h.gif

And in 30 second bins

 http://abelian.org/vlf/tmp/29499_140302i.gif

I don't know if it's any more readable but many
dots are clear in the 30 second one.

> Would slower be of any help for tonight's transmission?

Much.    For detection at the max possible range send pure
carrier.  To confirm ID, change frequency at some point,
10 mHz or so, on the hour.

For the slow Morse each doubling of dot length would double
the brightness of your trace on the spectrogram.  120 should
put you in the red and 240 would be well into the yellow.

Background noise subsided here from about 04:30 so the S/N
improved for the final 2.5 hours of transmission.  That
appears to be the European window to aim for.

--
Paul Nicholson
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