Return-Path: X-Spam-DCC: paranoid 1170; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_40_50,HTML_MESSAGE,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u4KMtCBb019875 for ; Sat, 21 May 2016 00:55:12 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1b3tFd-0006UG-Qs for rs_out_1@blacksheep.org; Fri, 20 May 2016 23:50:37 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1b3tFd-0006U7-9j for rsgb_lf_group@blacksheep.org; Fri, 20 May 2016 23:50:37 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1b3tFa-0005c7-RK for rsgb_lf_group@blacksheep.org; Fri, 20 May 2016 23:50:36 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 0389620C82 for ; Sat, 21 May 2016 00:50:32 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3rBNSR6hr7z5vN4 for ; Sat, 21 May 2016 00:50:31 +0200 (CEST) Message-ID: <573F94B7.10906@posteo.de> Date: Sat, 21 May 2016 00:50:31 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <154ce50bf7a-15f0-3cdb@webprd-a70.mail.aol.com> In-Reply-To: <154ce50bf7a-15f0-3cdb@webprd-a70.mail.aol.com> X-Scan-Signature: 17343f7e400f1005b5081acbd4115359 Subject: Re: VLF: Trying 6.47 kHz again, VLF.it Content-Type: multipart/alternative; boundary="------------030106040204010305020809" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8135 This is a multi-part message in MIME format. --------------030106040204010305020809 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Markus, OK, the latest EbNaut message is finished and the carrier is continuing. I'll let it on the air until tomorrow then we will see. Also, for everybodys information, Renato Romero has updated his Dreamers Band grabber window for 8270 Hz and 6470 Hz, see http://www.vlf.it/cumiana/livedata.html The distance to me is 510 km. I'm not sure if there is a chance to leave a trace there but it's not completely unrealistic in that bandwidth. 73, Stefan Am 20.05.2016 15:17, schrieb Markus Vester: > Armed with more effective autonotch filter settings and Wolf's latest > comb-notch option, I decided to have another go at receiving 6470 Hz. > It looks like the railway QRM in the narrowband spectrograms has > indeed gone down significantly. Of course with aggressive filtering > and blanking there's always a risk to kill desired signal as well, > throwing out the baby with the bathwater. As a check, I have added two > artificial carriers at -110 dB target level (same as DL3NDR on 8.27 kHz). > > Stefan, if you like you could perhaps try another long 6.47 kHz > carrier tomorrow or Sunday. If I can see it we mihght be able to > compare daytime propagation patterns between the two frequency bands. > > Best 73, > Markus > > http://www.df6nm.de/vlf/vlfgrabber.htm > --------------030106040204010305020809 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Markus,

OK, the latest EbNaut message is finished and the carrier is continuing. I'll let it on the air until tomorrow then we will see.

Also, for everybodys information, Renato Romero has updated his Dreamers Band grabber window for 8270 Hz and 6470 Hz, see http://www.vlf.it/cumiana/livedata.html

The distance to me is 510 km. I'm not sure if there is a chance to leave a trace there but it's not completely unrealistic in that bandwidth.

73, Stefan

Am 20.05.2016 15:17, schrieb Markus Vester:
Armed with more effective autonotch filter settings and Wolf's latest comb-notch option, I decided to have another go at receiving 6470 Hz. It looks like the railway QRM in the narrowband spectrograms has indeed gone down significantly. Of course with aggressive filtering and blanking there's always a risk to kill desired signal as well, throwing out the baby with the bathwater. As a check, I have added two artificial carriers at -110 dB target level (same as DL3NDR on 8.27 kHz).

Stefan, if you like you could perhaps try another long 6.47 kHz carrier tomorrow or Sunday. If I can see it we mihght be able to compare daytime propagation patterns between the two frequency bands.

Best 73,
Markus
--------------030106040204010305020809--