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 x0JM3Gdl026688 for ; Sat, 19 Jan 2019 23:03:22 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gkybD-0007ho-0R for rs_out_1@blacksheep.org; Sat, 19 Jan 2019 21:56:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gkyb6-0007hf-D5 for rsgb_lf_group@blacksheep.org; Sat, 19 Jan 2019 21:56:12 +0000 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1gkyb4-0003qp-2T for rsgb_lf_group@blacksheep.org; Sat, 19 Jan 2019 21:56:11 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 62B8A2400FB for ; Sat, 19 Jan 2019 22:56:07 +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=1547934968; bh=fwkDbJU0Vz8YDD6va7Wew97XYMdsrIlea2DpfFH9omc=; h=Date:From:To:Subject:From; b=b15l8UOFFAthSCDJ06EG0k/XOikKndW+r7GmBwv9oFba7sw6hva26h6LjEDlbFWGL aSpZ3KZ7q+nTX4JkS1AEldMWcEg7A3mpO5TDzQLN1zDrWw4ivD/IsPXYTIb95lhOk/ 2biL6UZsp9QMkEoP9QXifJJvGF62v6bDiqFgu6BgG/Vn7kQYr39wmqtwTy6ng3gUrH epjRHi5RCuoQw2AqIpXP/hNWx5KnQiajlbKuXX3/3njxPVcrZ7hcw7Kv4/faI+Hh97 oYF4fZSC33QlcoRXVt+UuaNTygBUUkjC5G/nJ8lxuobmEdpNihFpDxzJYkEqLfxEpq ivjBVt0MZTtCg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 43hs865vm8z9rxD for ; Sat, 19 Jan 2019 22:56:06 +0100 (CET) Message-ID: <5C439CF0.7050801@posteo.de> Date: Sat, 19 Jan 2019 22:56:00 +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: <1503839343.391931.1547931092876.ref@mail.yahoo.com> <1503839343.391931.1547931092876@mail.yahoo.com> In-Reply-To: <1503839343.391931.1547931092876@mail.yahoo.com> X-Spam-Score: -2.3 (--) 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: Hello Markus, Paul, VLF, Great, thanks for the feedback. Obviously a well detectable signal :-) The transmission ended at 20:24 UTC, i.e. after 130 minutes. At the end, the TX power was still 470 W although the accu was down [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.66 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: eb65b97b00a71049be1fa526941c7b31 Subject: Re: VLF: Night-transmission on 8270.1 Hz Content-Type: multipart/alternative; boundary="------------000004010504000500050509" 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_30_40,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 This is a multi-part message in MIME format. --------------000004010504000500050509 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello Markus, Paul, VLF, Great, thanks for the feedback. Obviously a well detectable signal :-) The transmission ended at 20:24 UTC, i.e. after 130 minutes. At the end, the TX power was still 470 W although the accu was down to 23 %. Now let's hope that Alex will find a spot on his spectrogram :-) 73, Stefan Am 19.01.2019 21:51, schrieb Markus Vester: > Nice nighttime activity! And a very strong signal on > our Bavarian grabbers > DL0AO https://vlf.u01.de/ > DF6NM http://www.df6nm.de/vlf/vlfgrabber.htm > > Unfortunately I discovered that due to low temperatures at the DL0AO > site, some SpecLab instances had lost samplerate tracking because the > deviation exceeded a +-5 ppm window. The problem was noticed and fixed > early into the transmission, but applying the change induced display > slips with repetition of some spectrogram columns. > > The nighttime peak in Todmorden is truly impressive! Hope that Alex > might pick up something as well. > > Best 73, > Markus (DF6NM) > > > Von: DK7FC > An: rsgb_lf_group > Verschickt: Sa, 19. Jan. 2019 19:50 > Betreff: VLF: Night-transmission on 8270.1 Hz > > Hi VLF, > > Since 18:14 UTC i am transmitting on the ground loop antenna again, this > time on 8270.1 Hz, where RN3AUS is watching from near Moscow! After the > recent very strong signal at SQ5BPF in 976 km distance i like to know if > the signal can make the 2040 km path to Alex as well? It is in the same > direction that SQ5BPF but more than twice the distance. Will this work? > Because the antenna is beaming towards Paul and has its null into the > direction to SQ5BPF and RN3AUS. Anyway the strong signal in Poland... > > Now i'm sitting in my car here, the sky is clear, the moon is full and > it is below 0 C here. I have some tea which is still warm, more or less. > The DC measurement at the loop tells it has just 57.5 Ohm at f=0! That > is the lowest value i measured so far. > The accu display tells me: 12.8V, 40.9A, 524 W, 85% rest capacity and > about 2.5 hours rest time left at this power level. I can measure the > antenna current with a Rohde&Schwarz scope using the spectrum analyzer > function. It tells me -6.3 dBV of the fundamental frequency, measured > across a 0.2 Ohm shunt resistor, so that is equal to 2.42 A antenna > current. > > Unfortunately the frequency is not covered by Paul's excellent grabber. > Maybe he can give some informations about the signal strength? It should > be my strongest signal since the kite experiments in 2011. > > The carrier will stay on the air for 2 hours. > > Al reports are welcome. > > 73, Stefan > > PS: Feet and tea cold now... > > > > --------------000004010504000500050509 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello Markus, Paul, VLF,

Great, thanks for the feedback. Obviously a well detectable signal :-)
The transmission ended at 20:24 UTC, i.e. after 130 minutes. At the end, the TX power was still 470 W although the accu was down to 23 %.

Now let's hope that Alex will find a spot on his spectrogram :-)

73, Stefan


Am 19.01.2019 21:51, schrieb Markus Vester:
Nice nighttime activity! And a very strong signal on our Bavarian grabbers
DL0AO https://vlf.u01.de/
DF6NM http://www.df6nm.de/vlf/vlfgrabber.htm

Unfortunately I discovered that due to low temperatures at the DL0AO site, some SpecLab instances had lost samplerate tracking because the deviation exceeded a +-5 ppm window. The problem was noticed and fixed early into the transmission, but applying the change induced display slips with repetition of some spectrogram columns.

The nighttime peak in Todmorden is truly impressive! Hope that Alex might pick up something as well.

Best 73,
Markus (DF6NM)


Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Sa, 19. Jan. 2019 19:50
Betreff: VLF: Night-transmission on 8270.1 Hz

Hi VLF,

Since 18:14 UTC i am transmitting on the ground loop antenna again, this
time on 8270.1 Hz, where RN3AUS is watching from near Moscow! After the
recent very strong signal at SQ5BPF in 976 km distance i like to know if
the signal can make the 2040 km path to Alex as well? It is in the same
direction that SQ5BPF but more than twice the distance. Will this work?
Because the antenna is beaming towards Paul and has its null into the
direction to SQ5BPF and RN3AUS. Anyway the strong signal in Poland...

Now i'm sitting in my car here, the sky is clear, the moon is full and
it is below 0 C here. I have some tea which is still warm, more or less.
The DC measurement at the loop tells it has just 57.5 Ohm at f=0! That
is the lowest value i measured so far.
The accu display tells me: 12.8V, 40.9A, 524 W, 85% rest capacity and
about 2.5 hours rest time left at this power level. I can measure the
antenna current with a Rohde&Schwarz scope using the spectrum analyzer
function. It tells me -6.3 dBV of the fundamental frequency, measured
across a 0.2 Ohm shunt resistor, so that is equal to 2.42 A antenna current.

Unfortunately the frequency is not covered by Paul's excellent grabber.
Maybe he can give some informations about the signal strength? It should
be my strongest signal since the kite experiments in 2011.

The carrier will stay on the air for 2 hours.

Al reports are welcome.

73, Stefan

PS: Feet and tea cold now...




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