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 x02DRhoJ019349 for ; Wed, 2 Jan 2019 14:27:54 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gegOt-000479-Od for rs_out_1@blacksheep.org; Wed, 02 Jan 2019 13:17:35 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gegLm-00046I-Qg for rsgb_lf_group@blacksheep.org; Wed, 02 Jan 2019 13:14:22 +0000 Received: from lethe.lipkowski.org ([151.80.54.59] helo=lipkowski.org) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gegLk-000863-BX for rsgb_lf_group@blacksheep.org; Wed, 02 Jan 2019 13:14:21 +0000 Received: from mailn.lipkowski.org (localhost [127.0.0.1]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x02D7v2t008301 for ; Wed, 2 Jan 2019 14:07:58 +0100 Received: from localhost (sq5bpf@localhost) by mailn.lipkowski.org (8.14.4/8.14.4/Submit) with ESMTP id x02D7v51008298 for ; Wed, 2 Jan 2019 14:07:57 +0100 X-Authentication-Warning: mailn.lipkowski.org: sq5bpf owned process doing -bs Date: Wed, 2 Jan 2019 14:07:56 +0100 (CET) From: Jacek Lipkowski To: rsgb_lf_group@blacksheep.org In-Reply-To: <110474941.11712178.1546426885002@mail.yahoo.com> Message-ID: References: <110474941.11712178.1546426885002.ref@mail.yahoo.com> <110474941.11712178.1546426885002@mail.yahoo.com> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 X-Spam-Score-sq5bpf: -2.9 () ALL_TRUSTED,BAYES_00 X-Scanned-By: MIMEDefang 2.75 on 10.1.3.10 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 @@CONTACT_ADDRESS@@ for details. Content preview: Thanks Markus You're right! This is a nice example how one can make a false result. I will re-run the tests this evening. Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-Scan-Signature: fbdd513523001863775249cfaf215eac Subject: Re: ULF: Carrier on 2970.01 Hz Content-Type: MULTIPART/MIXED; BOUNDARY="17435139-1043099028-1546434477=:1809" 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 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --17435139-1043099028-1546434477=:1809 Content-Type: TEXT/PLAIN; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8BIT Thanks Markus You're right! This is a nice example how one can make a false result. I will re-run the tests this evening. VY 73 Jacek / SQ5BPF On Wed, 2 Jan 2019, Markus Vester wrote: > Date: Wed, 2 Jan 2019 11:01:24 +0000 (UTC) > From: Markus Vester > Reply-To: rsgb_lf_group@blacksheep.org > To: rsgb_lf_group@blacksheep.org > Subject: Re: ULF: Carrier on 2970.01 Hz > > Hi Jacek, > > wrong frequency? I think Stefan was on 2970.01 Hz, not 2970.1 Hz. > > 73 and good luck, > Markus > > -----Ursprüngliche Mitteilung----- > Von: Jacek Lipkowski > An: rsgb_lf_group > Verschickt: Mi, 2. Jan. 2019 10:43 > Betreff: Re: ULF: Carrier on 2970.01 Hz > > This is the best i can do so far. Using vlfrx-tools 0.9f and > > vtfilter -a th=5 -h hp,f=1750,poles=8 -h lp,f=4250,poles=8 | vtblank -a25 -d0.005 -t1000 > > Does that count as a reception? > > VY 73 es HNY > > Jacek / SQ5BPF > > > On Sun, 30 Dec 2018, DK7FC wrote: > > > Date: Sun, 30 Dec 2018 22:15:04 +0100 > > From: DK7FC > > Reply-To: rsgb_lf_group@blacksheep.org > > To: rsgb_lf_group@blacksheep.org > > Subject: Re: ULF: Carrier on 2970.01 Hz > > > > Hello Jacek, > > > > Did you just look into a spectrogram or did you try to produce a spectrum > > peak from your data storage? > > Do you use the -a th=x function in vtfilter. > > I think i have the latest version of vlfrx-tools. It is worth to upgrade. > > Instead of the band pass filter i'm using a low pass and a high pass. After a > > lot of trials i tend to use this setting as a standard: > > vtread -T2018-12-30,11:17,+2h /database | vtcat -p | vtfilter -a th=5 -h > > hp,f=1750,poles=8 -h lp,4250,poles=8 | vtblank -a25 -d0.0005 -t100 | vtmult > > -f2970.01 | vtresample -r240 | vtresample -r10 | vtraw -oa | ebnaut -dp8K19A > > -c4 -r10 -v -f15 -f16 -N5 -M'*****' -k27 -S12 > > > > The ebnaut message is just a dummy for a 2 hour long carrier transmission. > > The output of that command line will show the S/N of the spectrum peak in its > > bandwidth (1/duration). > > The autonotch filter is important in that frequency range and can decide > > between failed and success! > > > > I would be interested in the result on your side. > > > > 73, Stefan > > > > > > > > Am 30.12.2018 21:45, schrieb Jacek Lipkowski: > >> Ufortunately i didn't receive anything here. Not very exciting but i > >> believe that negative results should also be reported. > >> > >> The spectrograms: > >> > >> https://klubnl.pl/grabber/grabber_sq5bpf_2970.png > >> https://klubnl.pl/grabber/grabber_sq5bpf_2970_avg.png > >> > >> Right now i use the same settings as on my 5170Hz grabber: a 3kHz wide > >> filter centered on 2970Hz, followed by vtblank  -a1.4 -d0 -t100 (vtblank > >> from old vlfrx-tools). I would be grateful for any suggestions how to > >> improve this, maybe the filter is too wide (and lets too many 50Hz > >> harmonics through. which upset the blanker). > >> > >> The antenna isn't optimised for ULF. > >> > >> VY 73 > >> > >> Jacek / SQ5BPF > >> > >> On Sun, 30 Dec 2018, DK7FC wrote: > >> > >>> Date: Sun, 30 Dec 2018 12:38:04 +0100 > >>> From: DK7FC > >>> Reply-To: rsgb_lf_group@blacksheep.org > >>> To: rsgb_lf_group@blacksheep.org > >>> Subject: ULF: Carrier on 2970.01 Hz > >>> > >>> Hi ULF, > >>> > >>> The accu is fully recharged and i am on the hill again, transmitting on > >>> the ground loop antenna. This time, the accu has even more power. The TX > >>> power is 520 W (!), the DC measurement tells i need just 64 V for 1 A, and > >>> now, at 2970.01 Hz i am getting a record antenna current of 2.75 A!! > >>> The carrier ison the air since 11:17 UTC and i intend to run it for 2 > >>> hours again, like yesterday. > >>> > >>> Reports are welcome :-) > >>> > >>> 73, Stefan > >>> > >> > > > > > --17435139-1043099028-1546434477=:1809--