Return-Path: Received: from mtain-dd02.r1000.mx.aol.com (mtain-dd02.r1000.mx.aol.com [172.29.64.142]) by air-dc02.mail.aol.com (v129.4) with ESMTP id MAILINDC024-86a04d9de83d3a9; Thu, 07 Apr 2011 12:37:17 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 692D5380000B8; Thu, 7 Apr 2011 12:37:14 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Q7sBK-0004Pp-Bp for rs_out_1@blacksheep.org; Thu, 07 Apr 2011 17:35:42 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Q7sBJ-0004Pg-Sv for rsgb_lf_group@blacksheep.org; Thu, 07 Apr 2011 17:35:41 +0100 Received: from mail-wy0-f171.google.com ([74.125.82.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Q7sBF-0003oZ-Uk for rsgb_lf_group@blacksheep.org; Thu, 07 Apr 2011 17:35:41 +0100 Received: by wyb32 with SMTP id 32so3387698wyb.16 for ; Thu, 07 Apr 2011 09:35:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=5WaXFC077CQ2fFWYj8qkXBPsL2ORreni/Wyj+ueKHb4=; b=Hnp0rYOLcjiWlWDGayiQ8p9MUZexBdcXXLhlxEFUjvjnWQQQvRYYI1v3BmdLpn6Egv 6DksQb2eSfdlZLgfcizQJxjRr6lYPSOOEHplObOOZlQ+WsoqLIIkzqI6nDDX1zj/c8Ii z0urUygUDKFke9GLiZz4SpnZsmvADNh2yujsY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=CxYAbpiVXwTJhFf3gz3x7en5+ymC8YUGb6Qs8LUGIFLOkckiIfqZDM1YnB63LO94FD /2J0VAmXySMLd47hBgAnKp5TyuSPZ39Dcom2Bufe3H7wUoXE7Uz1tCSxUtzqHN/nMK3v vM+BIftuhjIixfOI0aaSN38evHl6wgwL7bVbc= MIME-Version: 1.0 Received: by 10.227.165.194 with SMTP id j2mr1146344wby.178.1302194130283; Thu, 07 Apr 2011 09:35:30 -0700 (PDT) Received: by 10.216.37.200 with HTTP; Thu, 7 Apr 2011 09:35:30 -0700 (PDT) In-Reply-To: <4D9DE551.9020508@talktalk.net> References: <4D9DE551.9020508@talktalk.net> Date: Thu, 7 Apr 2011 17:35:30 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: VLF QRM puzzle - why not the same in a split screen on SL? Content-Type: multipart/alternative; boundary=90e6ba4768d9906d9604a056b28c 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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m014.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d408e4d9de83950f5 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --90e6ba4768d9906d9604a056b28c Content-Type: text/plain; charset=ISO-8859-1 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/ --90e6ba4768d9906d9604a056b28c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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 G3X= BM

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, rar= ely climbing above 6kHz but peaks sometimes get to 8.971kHz not much highe= r..

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 dri= er and for two periods there was a burst of interference visible on the lo= wer 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 whe= n the settings are the same. =A0I have a SL filter selected but it is cent= red around 8.970kHz with 400Hz width and slopes so this cannot explain thi= s. 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.u= k
http://www= .youtube.com/user/g3xbm
https= ://sites.google.com/site/sub9khz/







--
http://g3xbm-qrp.blogsp= ot.com/
http:/= /www.g3xbm.co.uk
http://www= .youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/
--90e6ba4768d9906d9604a056b28c--