Return-Path: Received: from mtain-dl02.r1000.mx.aol.com (mtain-dl02.r1000.mx.aol.com [172.29.74.208]) by air-me01.mail.aol.com (v129.4) with ESMTP id MAILINME012-8ba14d9dee0195; Thu, 07 Apr 2011 13:01:53 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 0A39538000329; Thu, 7 Apr 2011 13:01:45 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Q7sZ9-0004fA-Mt for rs_out_1@blacksheep.org; Thu, 07 Apr 2011 18:00:19 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Q7sZ9-0004f1-38 for rsgb_lf_group@blacksheep.org; Thu, 07 Apr 2011 18:00:19 +0100 Received: from out1.ip09ir2.opaltelecom.net ([62.24.128.245]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Q7sZ6-0004Et-Rb for rsgb_lf_group@blacksheep.org; Thu, 07 Apr 2011 18:00:19 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApEBADnsnU1OlmQL/2dsb2JhbAAM53qFbQSRSA X-IronPort-AV: E=Sophos;i="4.63,317,1299456000"; d="scan'208,217";a="474220718" Received: from unknown (HELO [192.168.2.5]) ([78.150.100.11]) by out1.ip09ir2.opaltelecom.net with ESMTP; 07 Apr 2011 18:00:09 +0100 Message-ID: <4D9DED92.6000006@talktalk.net> Date: Thu, 07 Apr 2011 18:00:02 +0100 From: "qrss@talktalk.net" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4D9DE551.9020508@talktalk.net> In-Reply-To: X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: VLF QRM puzzle - why not the same in a split screen on SL? Content-Type: multipart/alternative; boundary="------------020703000506010700050805" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE 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: 3039ac1d4ad04d9dedf95de6 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --------------020703000506010700050805 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit :-) To borrow Hancock's words, 5Hz that's very nearly a screenfull. I have pulled my 600 screen down so you can see the strong lines which filled the screen around 1400 today petering out at 8.971kHh 'ish. When they have gone they have gone. Looking at your split screen Grabber there are traces of the vertical lines around 8.976kHz at the same time but they petered out at about 8.971kHz I suspect. 73 Eddie On 07/04/2011 17:35, Roger Lapthorn wrote: > Thanks Eddie, but we are only talking about 5Hz difference and the > signal is there on one window and not on the other. Odd. > > 73s > Roger G3XBM > > On 7 April 2011 17:24, qrss > wrote: > > Hi Roger > > I don't fit your category, (understanding SL) however I often see > this, noise from the mains I suspect, huge dirty sine waves. > Considering they originate from a 50Hz source they are strongest > at lower frequencies, rarely climbing above 6kHz but peaks > sometimes get to 8.971kHz not much higher.. > > 73 Eddie G3ZJO > > > On 07/04/2011 17:09, Roger Lapthorn wrote: > > Help... > > After lunch today my wife turned on the washing machine and > the tumble drier and for two periods there was a burst of > interference visible on the lower split screen as vertical > noise stripes. What I don't understand is why I don't see > these also on the upper trace around 8.976kHz too when the > settings are the same. I have a SL filter selected but it is > centred around 8.970kHz with 400Hz width and slopes so this > cannot explain this. Surely the noise bursts should appear in > both parts of the screen? > > Can someone who understands Spectrum Lab explain this please? > > 73s > Roger G3XBM > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > https://sites.google.com/site/sub9khz/ > > > > > > > > -- > http://g3xbm-qrp.blogspot..com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > https://sites.google.com/site/sub9khz/ > > > ------------------------------------------------------------------------ > ------------------------------------------------------------------------ > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1209 / Virus Database: 1500/3556 - Release Date: 04/06/11 > --------------020703000506010700050805 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit :-) To borrow Hancock's words, 5Hz that's very nearly a screenfull.  I have pulled my 600 screen down so you can see the strong lines which filled the screen around 1400 today petering out at 8.971kHh 'ish. When they have gone they have gone.

Looking at your split screen Grabber there are traces of the vertical lines around 8.976kHz at the same time but they petered out at about 8.971kHz I suspect.

73 Eddie

On 07/04/2011 17:35, Roger Lapthorn wrote:
Thanks Eddie, but we are only talking about 5Hz difference and the signal is there on one window and not on the other. Odd.

73s
Roger G3XBM

On 7 April 2011 17:24, qrss <qrss@talktalk.net> wrote:
Hi Roger

I don't fit your category, (understanding SL) however I often see this, noise from the mains I suspect, huge dirty sine waves. Considering they originate from a 50Hz source they are strongest at lower frequencies, rarely climbing above 6kHz but peaks sometimes get to 8.971kHz not much higher..

73 Eddie G3ZJO


On 07/04/2011 17:09, Roger Lapthorn wrote:
Help...

After lunch today my wife turned on the washing machine and the tumble drier and for two periods there was a burst of interference visible on the lower split screen as vertical noise stripes. What I don't understand is why I don't see these also on the upper trace around 8.976kHz too when the settings are the same.  I have a SL filter selected but it is centred around 8.970kHz with 400Hz width and slopes so this cannot explain this. Surely the noise bursts should appear in both parts of the screen?

Can someone who understands Spectrum Lab explain this please?

73s
Roger G3XBM

--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/







--
http://g3xbm-qrp.blogspot..com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/


No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1209 / Virus Database: 1500/3556 - Release Date: 04/06/11


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