It appears to me that your 60 second bins has it! I see A and B very plainly. Your RX capability is phenomenal!!!
I will be running in QRSS 180 tonight. If it isn't enough I can go slower yet and then carrier for an hour with slight freq switch if nothing else works.
Please during transmission send me e mail for any changes you might like me to implement. Not sure if you can or want to stay up that late but I will do whatever it takes to see your optimum results.
This is only second night on and transmitter still not optimum. Have tuned input to make and install. Would like a few more DB before corona takes over-Bob
> Date: Sun, 2 Mar 2014 17:16:42 +0000
> From:
[email protected]> To:
[email protected]> Subject: Re: LF: Would slower QRSS help?
>
> > ... 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
> --
>
