Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id vB7ATlip000693 for ; Thu, 7 Dec 2017 11:29:50 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eMtKi-0000aT-JS for rs_out_1@blacksheep.org; Thu, 07 Dec 2017 10:23:12 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eMtKh-0000aK-M5 for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2017 10:23:11 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eMtKe-0008Hk-Ci for rsgb_lf_group@blacksheep.org; Thu, 07 Dec 2017 10:23:10 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id 2975E20DF9 for ; Thu, 7 Dec 2017 11:23:04 +0100 (CET) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1512642185; bh=lcBe0gjBUACAS0xd+kElrxOobIraXfPA+nU+syi8CaU=; h=Date:From:To:Subject:From; b=aO7zto0p1NcSAaUNCJ0+g3Vp6QvZPzugrYLUx1RodwGy48t1/49CjZu87Bbh4lgGE EC+IxakdUGi4QyNkiJ+SxecroasJ/yNOpwcxMk3LC5EgQjQMRpWChM3JTsJlZHHnh6 Tn5nxou1yPq7SUnNOwCsEq90sxS4qRbsutk1vQrcsedbtnJN6/K3gKxQ8K7G+Swtgt dK+0mY6XNPeYkZa3N2Q+iKMu0qowJmAFNyd5SBNEFpDSFPaIPUh7tjn9f/Zw9WnetA m1SRWCE+o8dUw5eDwpHkc2ZfnGDQpGLbR80OmAAXqlJxXTdYoeG+yOVZpp0+VIKTjh 3HLHUasYjGZKA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3yss4l1XHRz9rxj for ; Thu, 7 Dec 2017 11:23:00 +0100 (CET) Message-ID: <5A291684.7060404@posteo.de> Date: Thu, 07 Dec 2017 11:23:00 +0100 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: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org> <5A19FF75.7080801@posteo.de> <5A1FFE7C.9050703@posteo.de> <5A226B0C.3080701@posteo.de> <579355A36AEE9D4FA555C45D556003AB9AAB0EB9@servigilant.vigilant.local> <5A25C304.3050607@posteo.de> <5A271218.9040803@posteo.de> <1d9b2c0d-5fd5-066d-8f66-e85a79f88f16@abelian.org> In-Reply-To: X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello Jacek, Paul, VLF, Great results! And thanks for your greatly working grabber. I did never expect that the effect is so expressed. As Paul says, it may be worth to do a series of optimisations to find optimum filter responses for the special band with it strong 'neighbour' stations. Would be interesting to see how strong JXN and HWU can become in VK7 for example!!! :-) [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 66d07794ca19cd68f7d6cc289cd4ac18 Subject: Re: VLF: First VLF detection DL > EA Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 Hello Jacek, Paul, VLF, Great results! And thanks for your greatly working grabber. I did never expect that the effect is so expressed. As Paul says, it may be worth to do a series of optimisations to find optimum filter responses for the special band with it strong 'neighbour' stations. Would be interesting to see how strong JXN and HWU can become in VK7 for example!!! :-) Regarding the notches inside the passband. How 'deep' is the notch in vlfrx-tools? I think there can be an improvement if the stop-band attenuation is only as high as necessary, say 20 dB for JXN, not as high as possible (> 100 dB). 73, Stefan Am 07.12.2017 08:26, schrieb Jacek Lipkowski: > On Wed, 6 Dec 2017, Paul Nicholson wrote: > >> vtfilter -e eqmap -h bp,f=17470,w=3000 -h bs,f=16400,w=600 >> -hbs,f=18300,w=800 > > with your filtering settings i immediately went from no signal to > great signal on my grabber: > > https://klubnl.pl/wpr/en/index.php/klubnl-pl-grabbers/tymczasowy-grabber-sq5bpf-do-testow-stefana-dk7fc-na-17-4701hz/ > > > i will reprocess the whole grabber window from 2 december, and after > that have the grabber updated live again. > >> Maybe that's the problem with this band then, just getting >> the right filtering before the blanker. > > seems so. > > btw what is the reason to use a 3kHz filter before the noise blanker > and not a narrower one? i can understand the reason for not using 10Hz > bandwidth, but why not 1kHz? > > i was wondering how you got at the 3kHz figure? > > VY 73 > > Jacek / SQ5BPF > >