Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.5 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_SORBS_SPAM, SPF_PASS,T_DKIM_INVALID,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 X-Spam-DCC: wuwien: mailn 1290; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v7KDlkYv008959 for ; Sun, 20 Aug 2017 15:47:48 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1djQQE-0005Zo-Vg for rs_out_1@blacksheep.org; Sun, 20 Aug 2017 14:37:46 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1djQQE-0005Zf-KU for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2017 14:37:46 +0100 Received: from omr-a014e.mx.aol.com ([204.29.186.62]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1djQQ9-0006Zx-VP for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2017 14:37:45 +0100 Received: from mtaomg-mae01.mx.aol.com (mtaomg-mae01.mx.aol.com [172.26.254.143]) by omr-a014e.mx.aol.com (Outbound Mail Relay) with ESMTP id D7C7A380009E for ; Sun, 20 Aug 2017 09:37:38 -0400 (EDT) Received: from core-acb02c.mail.aol.com (core-acb02.mail.aol.com [172.27.24.2]) by mtaomg-mae01.mx.aol.com (OMAG/Core Interface) with ESMTP id 7D3F138000081 for ; Sun, 20 Aug 2017 09:37:38 -0400 (EDT) Received: from 188.192.44.165 by webjas-vab031.srv.aolmail.net (10.96.18.34) with HTTP (WebMailUI); Sun, 20 Aug 2017 09:37:37 -0400 Date: Sun, 20 Aug 2017 09:37:38 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15dffdcf848-c0a-3698@webjas-vab031.srv.aolmail.net> In-Reply-To: <15dfee99b81-7bd4-26e7d@webprd-a74.mail.aol.com> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.44.165] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1503236258; bh=NEQChrvWIuFuP3q86uLcghKgjeuIbKLahd2UoCk8C2Y=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=o/SezzsWE8JTsl7lm0yMajKof5hFjlrf/PoAE2kk7wE59HDOjH8HxfbgPCu5Y+vQB NBlZXMbecvwe7/lqxwgalQWbOIwETP+mxkDlj8pwOZ0WdzOgtbyn+WUsqzOjBAP+sU AvL074A/h21VenHqwI27QAUpEpLALYQftoYsd9oA= x-aol-sid: 3039ac1afe8f599990a242aa X-Scan-Signature: 3dad7246509e3b317974c9d84e795ac1 Subject: Re: VLF: Carrier on 4470.005 Hz! Content-Type: multipart/alternative; boundary="----=_Part_17819_156398688.1503236257864" 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 2.75 Status: RO X-Status: X-Keywords: X-UID: 12407 ------=_Part_17819_156398688.1503236257864 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable I have managed to resonate my antenna and started a carrier on 4470.0025 Hz= since 13:07 UT. Antenna current is 0.16 A into 8 m effective height. Hope = that it might also become visible on DL0AO, and perhaps provide an improved= calibration reference for propagation from Heidelberg. =20 Best 73, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group Verschickt: So, 20. Aug 2017 11:11 Betreff: Re: VLF: Carrier on 4470.005 Hz! Hi Stefan, this morning, an unambiguous peak has come up on the DL0AO cardioid in 31 u= Hz:=20 http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao_test.htm The signal level (-140 dB) seems to be similar to that previously observed = on 3675 Hz (noting that the gain of the synthetic cardioid summation has si= nce been reduced by 6 dB to make it equal to the single antennas). We can = probably hope for improved SNR during the day. Well done again! Best 73, Markus (DF6NM) =20 -----Urspr=C3=BCngliche Mitteilung-----=20 Von: DK7FC An: rsgb_lf_group Verschickt: Sa, 19. Aug 2017 15:01 Betreff: Re: VLF: Carrier on 4470.005 Hz! ...Rather 5 uW. Am 19.08.2017 14:28, schrieb DK7FC:=20 Hello VLF,=20 I un-wound the defective stack of the large coil which was used for 2970 H= z. It took about 4 hours to carefully unwound about 1000 turns, or about 1 = km of wire. The wire will be used for new coils which are already planned. Now, the remaining 4 stacks should hold at least 15 kV. I connected the co= il to the antenna and found the resonance close to 4470 Hz.=20 Now i'm running (since 12 UTC) a carrier transmission on 4470.005 Hz. The = antenna current is just 150 mA. That's an ERP of about 3 uW. A first signal= on the 67 km band from here :-) Let's see how long it holds until there is the next fault :-/ Reports/Spectrograms welcome... As usual there is a monitoring of the signal in 3.5 km distance from my tr= ee grabber: http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber= 2.html 73, Stefan Am 13.08.2017 22:17, schrieb DK7FC:=20 The repetition of yesterdays message failed. At 15:38 UTC the safety functi= on tripped. I've just been on the roof, when re-starting the transmission i= can see a spark in the center of one of the stacks. So now there is anothe= r one which has a flash over! :-( It must be replaced, which is a lot of work. So the tranmissions on 3675 H= z will stopp for some time. At least we have some carrier detections and ev= en EbNaut decodes. I need to think about a different coil concept.... More current, more volt= age, more power, more more more! ------=_Part_17819_156398688.1503236257864 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
I have managed to resonate my antenna and star= ted a carrier on 4470.0025 Hz since 13:07 UT. Antenna current is = 0.16 A into 8 m effective height. Hope that it might also become visib= le on DL0AO, and perhaps provide an improved calibration reference for = ;propagation from Heidelberg.  

Best 73,
Markus

=
-----Urspr=C3=BCngliche Mitteilung-----
Von: Markus Vester <mark= usvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org&= gt;
Verschickt: So, 20. Aug 2017 11:11
Betreff: Re: VLF: Carrier on 4= 470.005 Hz!

Hi Stefan,

th= is morning, an unambiguous peak has come up on the DL0AO cardioid= in 31 uHz: 
http://df6nm.bplaced.net/dl0ao/= VLFgrabber/vlfgrabber_dl0ao_test.htm
The signal level (-140 dB)= seems to be similar to that previously observed on 3675 Hz (noting th= at the gain of the synthetic cardioid summation has since been reduced= by 6 dB to make it equal to the single antennas).  We can probab= ly hope for improved SNR during the day.

Well done again!
Best 73,
Markus (DF6NM)   


-----Urspr=C3=BCn= gliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org><= br>Verschickt: Sa, 19. Aug 2017 15:01
Betreff: Re: VLF: Carrier on 4470.= 005 Hz!

...Rather 5 uW.

Am 19.08.2017 14:28, schrieb DK7FC:
=20 Hello VLF,

I un-wound the defective stack of the large coil which was used for 2970 Hz. It took about 4 hours to carefully unwound about 1000 turns, or about 1 km of wire. The wire will be used for new coils which are already planned.

Now, the remaining 4 stacks should hold at least 15 kV. I connected the coil to the antenna and found the resonance close to 4470 Hz.
Now i'm running (since 12 UTC) a carrier transmission on 4470.005 Hz= . The antenna current is just 150 mA. That's an ERP of about 3 uW. A first signal on the 67 km band from here :-)
Let's see how long it holds until there is the next fault :-/

Reports/Spectrograms welcome...

As usual there is a monitoring of the signal in 3.5 km distance from my tree grabber: http://www.iup.uni-heidelberg.de/schaefer_vlf/D= K7FC_VLF_Grabber2.html

73, Stefan

Am 13.08.2017 22:17, schrieb DK7FC:
=20 The repetition of yesterdays message failed. At 15:38 UTC the safety function tripped. I've just been on the roof, when re-starting the transmission i can see a spark in the center of one of the stacks. So now there is another one which has a flash over! :-(
It must be replaced, which is a lot of work. So the tranmissions on 3675 Hz will stopp for some time. At least we have some carrier detections and even EbNaut decodes.

I need to think about a different coil concept.... More current, more voltage, more power, more more more!
------=_Part_17819_156398688.1503236257864--