Return-Path: Received: from rly-md03.mx.aol.com (rly-md03.mail.aol.com [172.20.29.141]) by air-md07.mail.aol.com (v121_r4.4) with ESMTP id MAILINMD073-8f7492e4c2d120; Thu, 27 Nov 2008 02:28:58 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md03.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMD037-8f7492e4c2d120; Thu, 27 Nov 2008 02:28:47 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1L5bIL-0006s6-In for rs_out_1@blacksheep.org; Thu, 27 Nov 2008 07:28:13 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1L5bIL-0006rx-0v for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2008 07:28:13 +0000 Received: from blu0-omc1-s22.blu0.hotmail.com ([65.55.116.33]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1L5bIJ-0000QZ-VS for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2008 07:28:12 +0000 Received: from BLU146-DS3 ([65.55.116.8]) by blu0-omc1-s22.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 26 Nov 2008 23:28:02 -0800 X-Originating-IP: [12.32.62.189] X-Originating-Email: [hellozerohellozero@hotmail.com] Message-ID: From: "flo" In-Reply-To: To: References: Date: Thu, 27 Nov 2008 15:28:01 +0800 X-Unsent: 1 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 X-OriginalArrivalTime: 27 Nov 2008 07:28:02.0441 (UTC) FILETIME=[AE60F790:01C95061] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: ADSL Content-Type: multipart/alternative; boundary="----=_NextPart_000_005A_01C950A4.BC40C5F0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=FORGED_HOTMAIL_RCVD,HTML_20_30, HTML_MESSAGE,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-IP: 193.82.116.20 ------=_NextPart_000_005A_01C950A4.BC40C5F0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable Ive been playing at noise mitigation here at WE2 X PQ Wasilla Alaska and Im=20= pretty happy Ive got 137kHz down to a finite level where I cant really mitig= ate it any further - the noise level is effectively S3 per se and the contri= buted by sideband noise from Loran and other on air qrm/n. Sideband noise f= rom Loran is plainly audible. 500 kHz has been another matter - The meter sits at S5 or so on SSB in 2.8kH= z BW - The noise is proven to be from my ADSL ITU G.992.3 feed from my local= Telco - My feed is from an underground (UG) feed then a twisted pair into t= he house (of wooden frame construction) then into a distributed UTP star and= seried connections to RJ connections around the house including my ADSL mod= em.=20 The noise bandwidth appears around 150kHz up to 1 MHz which would appear to=20= be the "downlink' towards me power bandwidth. The fix isnt pretty but its to limit the length of the ADSL feed before it m= eets an ADSL filter or filters - in my case this is to site the ADSL modem c= lose to where it comes out of the ground then place the modem there and then= filter the RF out and only feed the audio to 4kHz round the house. I put a=20= wireless Linksys at the same location of the ADSL modem - filtering the hec= k out of power as we go - so all office comms are via wireless. Ill let you know how it goes but initial indications are by effectively shor= tening the ADSL "antennae" - that the my noise level has dropped to S2 and t= his isnt ADSL white noise - I cant distinguish any pattern to the noise so p= resume its dispersed by coding. ps Im limited to 512 K down so this is a pretty expensive and slowish ADSL c= onnection for those who live in the "boonies" -=20 So if you have a "Whiteish noise" view of 500 kHz or MF and you have some ne= gative influence from ADSL. Laurence KL1 X ------=_NextPart_000_005A_01C950A4.BC40C5F0 Content-Type: text/html; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable
Ive been playing at noise mitigation here at WE2 X P= Q=20 Wasilla Alaska and Im pretty happy Ive got 137kHz down to a finite level whe= re I=20 cant really mitigate it any further - the noise level is effectively S3 per=20= se=20 and the contributed by sideband noise from Loran and other on air qrm/n.&nbs= p;=20 Sideband noise from Loran is plainly audible.
 
500 kHz has been another matter - The meter sits at=20= S5 or=20 so on SSB in 2.8kHz BW - The noise is proven to be from my ADSL ITU=20 G.992.3 feed from my local Telco - My feed is from an underground (= UG)=20 feed then a twisted pair into the house (of wooden frame construction) then=20= into=20 a distributed UTP star and seried connections to RJ connections around the h= ouse=20 including my ADSL modem.
 
The noise bandwidth appears around 150kHz up to 1 MH= z=20 which would appear to be the "downlink' towards me power=20 bandwidth.
 
The fix isnt pretty but its to limit the length of t= he=20 ADSL feed before it meets an ADSL filter or filters - in my case this is to=20= site=20 the ADSL modem close to where it comes out of the ground then place the mode= m=20 there and then filter the RF out and only feed the audio to 4kHz round the=20 house. I put a wireless Linksys at the same location of the ADSL modem = -=20 filtering the heck out of power as we go - so all office comms are via=20 wireless.
 
Ill let you know how it goes but initial indications= are=20 by effectively shortening the ADSL "antennae" - that the my noise level= has=20 dropped to S2 and this isnt ADSL white noise - I cant distinguish any patter= n to=20 the noise so presume its dispersed by coding.
 
ps Im limited to 512 K down so this is a pretty expe= nsive=20 and slowish ADSL connection for those who live in the "boonies" -
 
So if you have a "Whiteish noise" view of 500 kHz or= =20 MF and you have some negative influence from ADSL.
 
Laurence KL1 X
 
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