Return-Path: <owner-rsgb_lf_group@blacksheep.org>
Received: from mtain-dd08.r1000.mx.aol.com (mtain-dd08.r1000.mx.aol.com [172.29.64.148]) by air-ma02.mail.aol.com (v129.4) with ESMTP id MAILINMA021-b4f34cd6a95f20; Sun, 07 Nov 2010 08:27:59 -0500
Received: from post.thorcom.com (post.thorcom.com [195.171.43.25])
by mtain-dd08.r1000.mx.aol.com (Internet Inbound) with ESMTP id 27649380000D5;
Sun, 7 Nov 2010 08:27:57 -0500 (EST)
Received: from majordom by post.thorcom.com with local (Exim 4.14)
id 1PF5GS-0004q6-54
for rs_out_1@blacksheep.org; Sun, 07 Nov 2010 13:26:32 +0000
Received: from [195.171.43.32] (helo=relay1.thorcom.net)
by post.thorcom.com with esmtp (Exim 4.14)
id 1PF5GR-0004px-Gu
for rsgb_lf_group@blacksheep.org; Sun, 07 Nov 2010 13:26:31 +0000
Received: from smtp6.freeserve.com ([193.252.22.192])
by relay1.thorcom.net with esmtp (Exim 4.63)
(envelope-from <g8fzk@g8fzk.fsnet.co.uk>)
id 1PF5GP-0004bY-KO
for rsgb_lf_group@blacksheep.org; Sun, 07 Nov 2010 13:26:31 +0000
Received: from me-wanadoo.net (localhost [127.0.0.1])
by mwinf3626.me.freeserve.com (SMTP Server) with ESMTP id 434DA7000089
for <rsgb_lf_group@blacksheep.org>; Sun, 7 Nov 2010 14:26:24 +0100 (CET)
Received: from me-wanadoo.net (localhost [127.0.0.1])
by mwinf3626.me.freeserve.com (SMTP Server) with ESMTP id 36AC2700008B
for <rsgb_lf_group@blacksheep.org>; Sun, 7 Nov 2010 14:26:24 +0100 (CET)
Received: from AGB (unknown [91.109.47.43])
by mwinf3626.me.freeserve.com (SMTP Server) with SMTP id B74B57000089
for <rsgb_lf_group@blacksheep.org>; Sun, 7 Nov 2010 14:26:23 +0100 (CET)
X-ME-UUID: 20101107132623750.B74B57000089@mwinf3626.me.freeserve.com
Message-ID: <FFD746031965412BBBE392876A0289E9@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <PAEFLMFGBDKKCONLMLBIEEFOCPAA.ganymede444@btopenworld.com>
In-Reply-To: <PAEFLMFGBDKKCONLMLBIEEFOCPAA.ganymede444@btopenworld.com>
Date: Sun, 7 Nov 2010 13:26:23 -0000
MIME-Version: 1.0
X-Priority: 3
X-MSMail-Priority: Normal
Importance: Normal
X-Mailer: Microsoft Windows Live Mail 14.0.8089.726
X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726
X-Antivirus: avast! (VPS 101107-0, 07/11/2010), Outbound message
X-Antivirus-Status: Clean
X-Spam-Score: 0.3 (/)
X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,MAILTO_TO_SPAM_ADDR=0.276
Subject: Re: Wideband Noise on 500 kHz [was RE: LF: WD2XSH/17 on WSPR]
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_00F0_01CB7E7F.5F104800"
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com
X-Spam-Level: *
X-Spam-Status: No, hits=1.7 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE,
HTML_MESSAGE,MAILTO_TO_SPAM_ADDR,MISSING_OUTLOOK_NAME autolearn=no
version=2.63
X-SA-Exim-Scanned: Yes
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
X-Listname: rsgb_lf_group
X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org
X-SA-Exim-Scanned: No; SAEximRunCond expanded to false
x-aol-global-disposition: G
x-aol-sid: 3039ac1d40944cd6a95b0310
X-AOL-IP: 195.171.43.25
X-AOL-SPF: domain : blacksheep.org SPF : temperror
------=_NextPart_000_00F0_01CB7E7F.5F104800
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Ok Dave,
So much for the skip theory , unless its leaking out of the grou=
nd , may be the channel tunnel is acting as a large coax cable =
=20
if you have a high noise level to start with , +10 is not good =
news , may be the original wspr slot at the top of the band is=
still
the better option , pity the tx time is so long , its not really=
matched to LF , if you only capture regularly 25% of the sync=
=20
then sending the other 75% is questionable ?
G..=20
From: Dave G3WCB.=20
Sent: Sunday, November 07, 2010 8:25 AM
To: rsgb_lf_group@blacksheep.org=20
Subject: Wideband Noise on 500 kHz [was RE: LF: WD2XSH/17 on WSPR]
Graham, LF,=20
I checked the wideband noise at midnight last night with my SPM-30 (3=
kHz bandwidth). It was clearly audible, and had the sort of buzz-saw=
rumble that one finds on HF occasionally. The levels were:-
496.0 kHz - 81 dBm
500.0 kHz - 73dBm
504.0 kHz - 83 dBm
So it's about 8 to 10 dB above my local background noise level :-(
No WSPR stations copied last night on 501 kHz.
73, Dave G3WCB IO91RM nr Windsor, S.E. England
-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group=
@blacksheep.org]On Behalf Of Graham
Sent: 06 November 2010 13:22
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: WD2XSH/17 on WSPR
Dave,
I think the sharp cut-off is the only elegant part of it ? , usi=
ng spec-lab , I can see a drop of 10 to 15 dB over 502 KHz .. sup=
pose its a good place to try data modes out .. interestingly , wspr=
is not producing any false decodes and the WD signal decoded tw=
ice , which I think is actually times 4 decodes , round 2400 z , bu=
t may be the s/n distorted by the noise floor increase ? my 100 wat=
ts crossed once , but gave a better s/n=20
There may be a possibility , that you are inside the skip range=
and out of the ground 75/100 mile range ..?
I see a couple of S points on the meter as I tune over the noise=
..marvellous .. and the pulse modulated Christmas lights are yet=
to come ...... hum-bug
73-G.
From: Dave G3WCB.=20
Sent: Saturday, November 06, 2010 12:43 PM
To: rsgb_lf_group@blacksheep.org=20
Subject: RE: LF: WD2XSH/17 on WSPR
Hi, Graham.
It's probably contributing to the overall high level of crud at this=
QTH, but I'm not aware of exactly how much it is adding.=20
I'll do some tests over the week-end and try to measure the contribu=
tion. From what I've seen on the various grabbers, it seems to have a=
fairly well-defined H F cut-off, so it should be easy to identify whe=
re the wideband datalink noise ends and the usual hash continues.
Cheers
Dave
-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_gro=
up@blacksheep.org]On Behalf Of Graham
Sent: 06 November 2010 11:07
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: WD2XSH/17 on WSPR
Dave,
Do you see the wide band noise at + 10 to +15 dB over the ba=
ckground noise ?=20
G..=20
From: Dave G3WCB.=20
Sent: Saturday, November 06, 2010 8:23 AM
To: rsgb_lf_group@blacksheep.org ; GQRP@yahoogroups.com=20
Subject: LF: WD2XSH/17 on WSPR
I snagged WD2XSH/17 last night on WSPR. This is pretty good going=
for this QTH, as I have a very high local noise level on 500 kHz.
2010-11-06 04:06 WD2XSH/17 0.501091 -27 0 FN42pb +30 1.00=
0 G3WCB IO91rm 5233 3252 =20
73, Dave G3WCB IO91RM nr Windsor, S.E.England
------=_NextPart_000_00F0_01CB7E7F.5F104800
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3Dtext/html;charset=3Diso-8859-1 http-equiv=3DContent-Ty=
pe>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.18975"></HEAD>
<BODY style=3D"PADDING-LEFT: 10px; PADDING-RIGHT: 10px; PADDING-TOP:=
15px" id=3DMailContainerBody leftMargin=3D0 topMargin=3D0 CanvasTab=
Stop=3D"true" name=3D"Compose message area">
<DIV><FONT size=3D2 face=3DArial>Ok Dave,</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>So much for the skip =
; theory ,=20
unless its leaking out of the ground , may be the&nb=
sp;=20
channel tunnel is acting as a large coax cable=
=20
</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>if you have a high noise=
level to =20
start with , +10 is not good news , may be the =
=20
original wspr slot at the top of the&nbs=
p; band is=20
still</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>the better option , pity=
the tx=20
time is so long , its not really matched to LF , if=
you =20
only capture regularly 25% of the sync </FONT>=
</DIV>
<DIV><FONT size=3D2 face=3DArial>then sending the other 75=
% is=20
questionable ?</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>G.. </FONT></DIV>
<DIV style=3D"FONT: 10pt Tahoma">
<DIV><BR></DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A title=3D"mailto:gan=
ymede444@btopenworld.com CTRL + Click to follow link" href=3D"ma=
ilto:ganymede444@btopenworld.com">Dave G3WCB.</A> </DIV>
<DIV><B>Sent:</B> Sunday, November 07, 2010 8:25 AM</DIV>
<DIV><B>To:</B> <A title=3D"mailto:rsgb_lf_group@blacksheep.org =
CTRL + Click to follow link" href=3D"mailto:rsgb_lf_group@blacksheep=
.org">rsgb_lf_group@blacksheep.org</A>=20
</DIV>
<DIV><B>Subject:</B> Wideband Noise on 500 kHz [was RE: LF: WD2XSH/17=
on=20
WSPR]</DIV></DIV></DIV>
<DIV><BR></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D70329=
1508-07112010>Graham, LF, </SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D70329=
1508-07112010></SPAN></FONT> </DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D7032915=
08-07112010>I=20
checked the wideband noise at midnight last night with my SPM-30 (3 kH=
z=20
bandwidth). It was clearly audible, and had the sort of buzz-saw rumbl=
e that one=20
finds on HF occasionally. The l</SPAN></FONT><FONT color=3D#0000ff siz=
e=3D2 face=3DArial><SPAN class=3D703291508-07112010>evels were:-</SP=
AN></FONT></DIV>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px" dir=3Dltr>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px" dir=3Dltr>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px" dir=3Dltr>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px" dir=3Dltr>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D703291508-07112010>496.0 kHz - 81=20
dBm</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D703291508-07112010>500.0 kHz -=20
73dBm</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D703291508-07112010>504.0 kHz - 83=20
dBm</SPAN></FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE>=
</BLOCKQUOTE>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D7032915=
08-07112010>So=20
it's about 8 to 10 dB above my local background noise level=20
:-(</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D70329=
1508-07112010></SPAN></FONT> </DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D7032915=
08-07112010>No=20
WSPR stations copied last night on 501 kHz.</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D70329=
1508-07112010></SPAN></FONT> </DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D7032915=
08-07112010>73,=20
Dave G3WCB IO91RM nr Windsor, S.E. England</SPAN></FONT></DIV>
<BLOCKQUOTE>
<DIV dir=3Dltr class=3DOutlookMessageHeader align=3Dleft><FONT size=
=3D2 face=3DTahoma>-----Original Message-----<BR><B>From:</B>=20
owner-rsgb_lf_group@blacksheep.org=20
[mailto:owner-rsgb_lf_group@blacksheep.org]<B>On Behalf Of=20
</B>Graham<BR><B>Sent:</B> 06 November 2010 13:22<BR><B>To:</B>=20
rsgb_lf_group@blacksheep.org<BR><B>Subject:</B> Re: LF: WD2XSH/17 on=
=20
WSPR<BR><BR></FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Dave,</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>I think the sharp cut-off&nbs=
p; is=20
the only elegant part of it ? , using spec-lab , I can&n=
bsp; see=20
a drop of 10 to 15 dB over 502 KHz .. suppose its=
a=20
good place to try data modes out .. interestingly , wspr=
is=20
not producing any false decodes and the WD=
=20
signal decoded twice , which I think is =20
actually times 4 decodes , round 2400 z , but may=
be=20
the s/n distorted by the noise floor increase ? my=
100=20
watts crossed once , but gave a better s/n </FONT>=
</DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>There may be a possibility ,=
that you=20
are inside the skip range and out of the gro=
und =20
75/100 mile range ..?</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>I see a couple of S poi=
nts on=20
the meter as I tune over the noise ..marvellous .. and=
=20
the pulse modulated Christmas lights are =
; yet=20
to come ...... hum-bug</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>73-G.</FONT></DIV>
<DIV><BR></DIV>
<DIV style=3D"FONT: 10pt Tahoma">
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A title=3D"mailto=
:ganymede444@btopenworld.com CTRL + Click to follow link" href=
=3D"mailto:ganymede444@btopenworld.com">Dave G3WCB.</A> </DIV>
<DIV><B>Sent:</B> Saturday, November 06, 2010 12:43 PM</DIV>
<DIV><B>To:</B> <A title=3D"mailto:rsgb_lf_group@blacksheep.org&=
#10;CTRL + Click to follow link" href=3D"mailto:rsgb_lf_group@blac=
ksheep.org">rsgb_lf_group@blacksheep.org</A>=20
</DIV>
<DIV><B>Subject:</B> RE: LF: WD2XSH/17 on WSPR</DIV></DIV></DIV>
<DIV><BR></DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial>Hi,=20
Graham.</FONT></SPAN></DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial></FONT></SPAN> </DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial>It's=20
probably contributing to the overall high level of crud at this QTH,=
but I'm=20
not aware of exactly how much it is adding. </FONT></SPAN></DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial></FONT></SPAN> </DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial>I'll=20
do some tests over the week-end and try to measure the contribution.=
From what=20
I've seen on the various grabbers, it seems to have a fairly well-de=
fined H F=20
cut-off, so it should be easy to identify where the wideband datalin=
k noise=20
ends and the usual hash continues.</FONT></SPAN></DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial></FONT></SPAN> </DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial>Cheers</FONT></SPAN></DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial></FONT></SPAN> </DIV>
<DIV><SPAN class=3D703203612-06112010><FONT color=3D#0000ff size=3D2=
face=3DArial>Dave</FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV dir=3Dltr class=3DOutlookMessageHeader align=3Dleft><FONT siz=
e=3D2 face=3DTahoma>-----Original Message-----<BR><B>From:</B>=
=20
owner-rsgb_lf_group@blacksheep.org=20
[mailto:owner-rsgb_lf_group@blacksheep.org]<B>On Behalf Of=20
</B>Graham<BR><B>Sent:</B> 06 November 2010 11:07<BR><B>To:</B>=20
rsgb_lf_group@blacksheep.org<BR><B>Subject:</B> Re: LF: WD2XSH/17=
on=20
WSPR<BR><BR></FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Dave,</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>Do you see the wide=
band noise=20
at + 10 to +15 dB over the background =
; noise ?=20
</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>G.. </FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV style=3D"FONT: 10pt Tahoma">
<DIV><BR></DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A title=3Dgan=
ymede444@btopenworld.com href=3D"mailto:ganymede444@btopenworld.=
com">Dave G3WCB.</A> </DIV>
<DIV><B>Sent:</B> Saturday, November 06, 2010 8:23 AM</DIV>
<DIV><B>To:</B> <A title=3D"mailto:rsgb_lf_group@blacksheep.=
org CTRL + Click to follow link" href=3D"mailto:rsgb_lf_grou=
p@blacksheep.org">rsgb_lf_group@blacksheep.org</A>=20
; <A title=3DGQRP@yahoogroups.com href=3D"mailto:GQRP@yahoog=
roups.com">GQRP@yahoogroups.com</A> </DIV>
<DIV><B>Subject:</B> LF: WD2XSH/17 on WSPR</DIV></DIV></DIV>
<DIV><BR></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN class=3D906=
231908-06112010>I=20
snagged WD2XSH/17 last night on WSPR. This is pretty good going fo=
r this=20
QTH, as I have a very high local noise level on 500 kHz.</SPAN></F=
ONT></DIV>
<BLOCKQUOTE>
<DIV><TD align=3D"left">2010-11-06 04:06 </TD><TD =
align=3D"left"> WD2XSH/17 </TD><TD align=3D"right">=
0.501091 </TD><TD align=3D"right"> -27 </=
TD><TD align=3D"right"> 0 </TD><TD align=3D"left">&n=
bsp;FN42pb </TD><TD align=3D"right"> +30 </TD><=
TD align=3D"right"> 1.000 </TD><TD align=3D"=
left"> G3WCB </TD><TD align=3D"left"> IO91rm&nb=
sp;</TD><TD align=3D"right"> 5233 </TD><TD align=3D"=
right"> 3252 <SPAN class=3D906231908-06112010><FONT=
color=3D#0000ff size=3D2 face=3DArial> </FONT></SPAN></D=
IV>
<DIV><SPAN class=3D906231908-06112010></SPAN> </DIV></BLOCK=
QUOTE>
<DIV><SPAN class=3D906231908-06112010><FONT color=3D#0000ff size=
=3D2 face=3DArial>73, Dave G3WCB IO91RM nr Windsor,=20
S.E.England</FONT></SPAN></DIV><BR><BR></BLOCKQUOTE><BR><BR></BLOC=
KQUOTE>
<br><br></BODY></HTML>
------=_NextPart_000_00F0_01CB7E7F.5F104800--