Message-ID: <000701cd9a47$25527990$6401a8c0@JAYDELL>
From: <jrusgrove@comcast.net>
To: <rsgb_lf_group@blacksheep.org>
References: <505F86FA.2030007@iup.uni-heidelberg.de>
Date: Mon, 24 Sep 2012 07:24:21 -0400
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Subject: LF: T/A WSPR-32
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Stefan

Good T/A copy of your WSPR-32 transmission ... unfortunately no reception of DF6NM. All available 
time slots were received.

05:30  DK7FC  0.136164  -16  0  JN49ik  +30  1.000  W1VD  FN31ls  6099  3790   2012-09-24 04:30 
DK7FC  0.136164  -20  0  JN49ik  +30  1.000  W1VD  FN31ls  6099  3790   2012-09-24 03:30  DK7FC 
0.136164  -25  0  JN49ik  +30  1.000  W1VD  FN31ls  6099  3790   2012-09-24 02:30  DK7FC 
0.136164  -21  0  JN49ik  +30  1.000  W1VD  FN31ls  6099  3790   2012-09-24 01:30  DK7FC 
0.136164  -23  0  JN49ik  +30  1.000  W1VD  FN31ls  6099  3790   2012-09-24 00:30  DK7FC 
0.136164  -19  0  JN49ik  +30  1.000  W1VD  FN31ls  6099  3790   2012-09-23 23:30  DK7FC 
0.136164  -21  0  JN49ik  +30  1.000  W1VD  FN31ls  6099  3790   2012-09-23

The database appears to have all my receptions although it's operation has been intermittant lately.

Jay W1VD  WD2XNS  WE2XGR/2










----- Original Message ----- 
From: Stefan Schäfer
To: Chris Gomoiu
Cc: rsgb_lf_group@blacksheep.org
Sent: Sunday, September 23, 2012 6:02 PM
Subject: LF: SL NB in WSPR-32 ?


Hello Chris,

I wonder if there could be an improvement by using the SpecLab noise reduction technics in series to 
the audio line to the WSPR program.

Would you like to try that? For me it makes no sense, because Markus is +10 dB S/N here ;-)

You're already running the EU60 SL instance. This one adds a bandpass of about 2.5 kHz width to the 
wideband spectrum of your receivers in 4X and YO. Behind this filter there is the Noiseblanker which 
improves QRSS/DFCW reception by at least 6 dB at nighttime, as we know. If you put the sound output 
of this SL instance to VAC2-in and define it VAC2-out as the standard audio device, then it should 
work. Of course the sound output in SL must be enabled.

If WSPR limits the input spectrum to 200 Hz, like we do in the IQ soundfile generated by sndinput, 
then there can't be adequate sferic blanking because 200 Hz is to narrow. Sferic blanking may be not 
such an advantage on HF, at least on the higher frequencies.

It would be interesting to see the difference. Maybe it makes things worse but i can't imagine.

What do you and Markus and others think?

73, Stefan/DK7FC