Return-Path: Received: from mtain-ma01.r1000.mx.aol.com (mtain-ma01.r1000.mx.aol.com [172.29.96.9]) by air-db04.mail.aol.com (v129.4) with ESMTP id MAILINDB043-86464d9e31f63ba; Thu, 07 Apr 2011 17:51:50 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 00D53380000C5; Thu, 7 Apr 2011 17:51:48 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Q7x5q-0007Rq-OE for rs_out_1@blacksheep.org; Thu, 07 Apr 2011 22:50:22 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Q7x5q-0007Rh-AJ for rsgb_lf_group@blacksheep.org; Thu, 07 Apr 2011 22:50:22 +0100 Received: from imr-db03.mx.aol.com ([205.188.91.97]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Q7x5o-00014Q-94 for rsgb_lf_group@blacksheep.org; Thu, 07 Apr 2011 22:50:22 +0100 Received: from mtaout-db05.r1000.mx.aol.com (mtaout-db05.r1000.mx.aol.com [172.29.51.197]) by imr-db03.mx.aol.com (8.14.1/8.14.1) with ESMTP id p37LoClJ032472 for ; Thu, 7 Apr 2011 17:50:12 -0400 Received: from White (nrbg-4d074eca.pool.mediaWays.net [77.7.78.202]) by mtaout-db05.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 07327E0000BE for ; Thu, 7 Apr 2011 17:50:09 -0400 (EDT) Message-ID: <03EC3F319D45459A9BF76AC317BFEF50@White> From: "Markus Vester" To: References: <4D9DE551.9020508@talktalk.net> <8CDC35F3F5B6ED8-1384-7716E@webmail-m143.sysops.aol.com> <4D9E132E.30608@iup.uni-heidelberg.de> Date: Thu, 7 Apr 2011 23:50:28 +0200 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-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: VLF: QRM puzzle - why not the same in a split screen on SL? Content-Type: multipart/alternative; boundary="----=_NextPart_000_009A_01CBF57E.92E7A490" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_60_70, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE,HTML_TITLE_EMPTY, 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: 3039ac1d60094d9e31f4287f X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_009A_01CBF57E.92E7A490 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Stefan, >> No! ...we are dreamers, so never say never ;-) >> There are problems on each frequency. If we move 6 Hz up, others wi= ll have problems at 8976 Hz. We've got a good demonstration of that "s= imply QSY a bit" on the EU window on 137 kHz.. If I recall right, the problems were actually solved _after_ moving th= e Eu slot by 6 Hz (from 136178 to 136172). >> And 8976 Hz is closer to 9000 Hz where some stations have problems= due to LF BCD stations, producing sidebands +-10...20...30 Hz. Yes, I'm aware of that. But 9000 - 30 =3D 8970.00!=20 >> 73, Stefan Here's a five-day spectrogram showing the railway-generated interferen= ce situation here:=20 http://df6nm.bplaced.net/VLF/screenshots/df6nm_8966-8980_110326.jpg Neither frequency is perfectly QRM free, but the area above 8971 is ge= nerally clearer here. Best wishes, Markus (DF6NM) Am 07.04.2011 19:20, schrieb Markus Vester:=20 Should we move the Dreamer's band 6 Hz up? Best 73, Markus (DF6NM) ------=_NextPart_000_009A_01CBF57E.92E7A490 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Stefan,
=
>> No!
 
...we are dreamers, so never say never ;-)
= <= FONT face=3DArial size=3D2>
>> There are problems= on=20 each frequency. If we move 6 Hz up, others will have problems at 8976= Hz. We've=20 got a good demonstration of that "simply QSY a bit" on the EU window= on 137=20 kHz..
If I recall right, the problems were= actually=20 solved _after_ moving the Eu sl= ot by=20 6 Hz (from 136178 to 136172).
 
>> And 8976 Hz is closer to 9000 Hz where some stations hav= e problems=20 due to LF BCD stations, producing sidebands +-10...20...30 Hz.
Yes, I'm aware of that. But 9000 - 30= =3D=20 8970.00! 
= <= FONT face=3DArial size=3D2>
>> 73,=20 Stefan
Here's a five-day spectrogram showing the railway-gener= ated=20 interference situation here: 
Neither frequency is perfectly QRM fr= ee, but the=20 area above 8971 is generally clearer here.
<= FONT face=3DArial size=3D2>

Best wishes,
Markus (DF6NM)
 
 
Am 07.04.2011 19:20, schrieb Markus Vester:=20
Should we move the Dreamer's band 6 Hz up?
 
Best 73,
Markus (DF6NM)
------=_NextPart_000_009A_01CBF57E.92E7A490--