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From: Laurence KL7 L <hellozerohellozero@hotmail.com>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Date: Tue, 4 Mar 2014 11:07:36 -0900
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 <BLU177-W177CD8229EA8473674A6DDCF8E0@phx.gbl>,<53162C49.3090601@iup.uni-heidelberg.de>
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Subject: RE: LF: QRSS 120 on 29.499 starts 2200...and NAA
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Agreed Stefan- this is the "less turns" LF loop not the VLF version Octoloo=
p  Im pre testing and Ill be probably wasting a bit by reducing the Q on th=
e larger one as Ill have more V  - I just wanted to stay away from active p=
reamplification for the moment and see whats really there - blanking effici=
ency looks ok even with this Q - tuning across the loop passband sounds lik=
e a tight <1.8kHz SSB filter :-)
Its not perfect but giving better s/n that my baseline omni which is the ri=
ght way to be going -=20
=20
At the moment Im testing using the W@G SLMS  for demod and recovered audio =
into the outboard soundcard/speclabbut Ill try direct to the Asus card when=
 Im sure Ive got the antennae correct - propagation this winter has just be=
en awful up here and roll on less Solar activity wearing my LF hat -
=20
Date: Tue=2C 4 Mar 2014 20:40:57 +0100
From: schaefer@iup.uni-heidelberg.de
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: QRSS 120 on 29.499 starts 2200...and NAA

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Hi Laurence=2C=20
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Am 04.03.2014 20:34=2C schrieb Laurence KL7 L:=0A=
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  =0A=
  Bob - will be listening - I need to move the passband=0A=
of the loop down 200Hz so will be tweaking tonight. The Q is very high -=0A=
=0A=

=0A=
Do you need the high Q to get a proper signal level (e.g. to bring it=0A=
across the soundcard noise)? Otherwise a lower Q would be better=2C in=0A=
order to get a better noise blanking efficiency.
=0A=

=0A=
73=2C Stefan/DK7FC
 		 	   		  =

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<body class=3D'hmmessage'><div dir=3D'ltr'>Agreed Stefan- this is the "less=
 turns" LF loop not the VLF version Octoloop &nbsp=3BIm pre&nbsp=3Btesting =
and Ill be probably wasting a bit by reducing the&nbsp=3BQ on the larger on=
e as Ill&nbsp=3Bhave more V&nbsp=3B&nbsp=3B- I just wanted to stay away fro=
m active preamplification for the moment and see whats really there - blank=
ing efficiency looks ok even&nbsp=3Bwith this Q - tuning across the loop pa=
ssband sounds like a tight &lt=3B1.8kHz SSB filter :-)<BR>Its not perfect b=
ut giving better s/n that my baseline omni which is the right way to be goi=
ng - <BR>&nbsp=3B<BR>At the moment Im&nbsp=3Btesting using the <a href=3D"m=
ailto:W@G">W@G</a> SLMS&nbsp=3B&nbsp=3Bfor demod and recovered audio into t=
he outboard soundcard/speclabbut Ill try direct to the Asus card when Im su=
re Ive got the antennae correct - propagation this winter has just been awf=
ul up here and&nbsp=3Broll on less Solar&nbsp=3Bactivity wearing my LF hat =
-<br>&nbsp=3B<BR><div><hr id=3D"stopSpelling">Date: Tue=2C 4 Mar 2014 20:40=
:57 +0100<br>From: schaefer@iup.uni-heidelberg.de<br>To: rsgb_lf_group@blac=
ksheep.org<br>Subject: Re: LF: QRSS 120 on 29.499 starts 2200...and NAA<br>=
<br>=0A=
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  =0A=
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Hi Laurence=2C <br>=0A=
<br>=0A=
Am 04.03.2014 20:34=2C schrieb Laurence KL7 L:=0A=
<blockquote cite=3D"mid:BLU177-W177CD8229EA8473674A6DDCF8E0@phx.gbl">=0A=
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  <div dir=3D"ltr">Bob - will be listening - I need to move the passband=0A=
of the loop down 200Hz so will be tweaking&nbsp=3Btonight. The Q is very hi=
gh -</div>=0A=
</blockquote>=0A=
<br>=0A=
Do you need the high Q to get a proper signal level (e.g. to bring it=0A=
across the soundcard noise)? Otherwise a lower Q would be better=2C in=0A=
order to get a better noise blanking efficiency.<br>=0A=
<br>=0A=
73=2C Stefan/DK7FC<br></div> 		 	   		  </div></body>
</html>=

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