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 wBTGo3vv024897 for ; Sat, 29 Dec 2018 17:50:04 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gdHkh-00046p-1J for rs_out_1@blacksheep.org; Sat, 29 Dec 2018 16:46:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gdHkg-00046g-Km for rsgb_lf_group@blacksheep.org; Sat, 29 Dec 2018 16:46:18 +0000 Received: from resqmta-ch2-08v.sys.comcast.net ([2001:558:fe21:29:69:252:207:40]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gdHke-0006rB-7O for rsgb_lf_group@blacksheep.org; Sat, 29 Dec 2018 16:46:17 +0000 Received: from resomta-ch2-09v.sys.comcast.net ([69.252.207.105]) by resqmta-ch2-08v.sys.comcast.net with ESMTP id dHNZgxb1OrkKMdHkZgep0i; Sat, 29 Dec 2018 16:46:11 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1546101971; bh=6O0Zj58cYh4yZK5XpZzpML8E2RvbTahO33PVf+oinDI=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=Jg/IcAp625qHpBMPZE+/iOrjL/gbkhAkFBa/+3hqerzEtAy0fByOx6OOffRDSm+Si zO0hbwdx62G27K62GRiOzrdM75WBNoBrvITjFog5pMrhTcqMvFZyalkmZ56Y3mE5rE HSoUTLTvJs9SXWnrva8f30x6L59bwPPnL4FgCS81ULxmQcbexSep0LtauYPPjNGqs6 GYQYhMWnMGSLlbeBhXZnSuLXY71692jarz1lupUrXYmWKgnJs9sKllx4MZWN4ur8A9 WLvawqPx73Lhf6Do70c/Ri6GOmuZjWQ+XSeeyt7siVDvxYvt0s8OG072iYuKPx+quZ vHNP12zyogrIw== Received: from Owner ([IPv6:2601:140:8500:7f9f:78f6:dd:b547:d008]) by resomta-ch2-09v.sys.comcast.net with ESMTPA id dHkWgExvzIqMhdHkXgTG3I; Sat, 29 Dec 2018 16:46:10 +0000 X-Xfinity-VMeta: sc=0;st=legit From: To: References: <1208359361.10549501.1546091687688.ref@mail.yahoo.com> <1208359361.10549501.1546091687688@mail.yahoo.com> In-Reply-To: <1208359361.10549501.1546091687688@mail.yahoo.com> Date: Sat, 29 Dec 2018 11:45:35 -0500 Message-ID: <030c01d49f95$fabc3990$f034acb0$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQGYV4g/ESjqk3XCluYs63tuvjzMgQH1VVr0pf7NkGA= Content-Language: en-us X-Spam-Score: -0.7 (/) 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: Good diagnosis Markus; and excellent to see six ~ 8270 Hz signals on Paul’s grabber! I wonder if the distribution of the Earth loop’s radiation pattern includes a somewhat higher percentage of higher elevation angles (than with the five electric field antennas recently operating at [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2001:558:fe21:29:69:252:207:40 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hvanesce[at]comcast.net) 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: 310131a5e532565f108a820138314750 Subject: RE: LF: VLF Carrier on 8270.01 Hz from a ground loop antenna - The 6th station on Paul's spectrogram Content-Type: multipart/alternative; boundary="----=_NextPart_000_030D_01D49F6C.11E63190" 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_40_50,HTML_MESSAGE, NO_REAL_NAME 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 multipart message in MIME format. ------=_NextPart_000_030D_01D49F6C.11E63190 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Good diagnosis Markus; and excellent to see six ~ 8270 Hz signals on = Paul=E2=80=99s grabber!=20 =20 I wonder if the distribution of the Earth loop=E2=80=99s radiation = pattern includes a somewhat higher percentage of higher elevation angles = (than with the five electric field antennas recently operating at 8270 = Hz), which could emphasize the process that Markus described. =20 I think that Paul=E2=80=99s grabber=E2=80=99s 186 hour window with the = six ~ 8270 Hz signals including diurnals and coordination is suitable = for framing, a beautiful sight. =20 73, =20 Jim AA5BW =20 =20 =20 From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus Vester Sent: Saturday, December 29, 2018 8:55 AM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VLF Carrier on 8270.01 Hz from a ground loop antenna - = The 6th station on Paul's spectrogram =20 Hi Stefan, strangely, nothing is visible here in N=C3=BCrnberg now. At DL0AO, the portable transmission (~ 280 km) appears to be around 9 dB = stronger compared to the institute in Heidelberg (~ 230 km, reference = measurement at 7:50 UT on Dec 27). However here in N=C3=BCrnberg it = seems to be the other way round: the transmission from the institute = (180 km) was strong (up to 20 dB SNR) all day, but the signal from the = guiderails (230 km) is completely invisible now. =20 The explanation may be that a sharp midday minimum exists at 230 km. = Looking at DL0AO traces, we can see that the signal from the institute = indeed almost disappeared at noon. During earlier Experiments it seemed = that the minimum was very pronounced on our 180 km path, but that was = later in the year around April and May. This seems to make sense, as = higher solar Illumination pushed the midday ionoshere further dowen, = requiring steeper skywave angle to arrive at the same 3/2 lambda path = difference for cancellation.=20 Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung----- Von: DK7FC An: rsgb_lf_group Verschickt: Sa, 29. Dez 2018 13:45 Betreff: LF: VLF Carrier on 8270.01 Hz from a ground loop antenna - The = 6th station on Paul's spectrogram Hi VLF friends, Since 11:35 UTC i'm running about 2.5 A antenna current into my 900m=20 long ground loop antenna. Frequency is 8270.01 Hz. The signal is very=20 strong on my own grabber in 57.6 km distance but also at DF6NM, DL0AO=20 and it looks like there is a peak now on Paul's spectrogram building up=20 slowly. I intend to run the carrier for 2 hours or so, until the accu is almost=20 empty :-) The H bridge PA voltage is 175 V and the power consumption is 450 W. Today, the DC measuremant result is 66V for 1 A antenna current. It is=20 cold and wet! More soon. 73 de DK7FC/P in JN39WI PS: The QRN is exceptional low!!!! =20 ------=_NextPart_000_030D_01D49F6C.11E63190 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Good diagnosis Markus; and excellent to see six ~ 8270 Hz signals on = Paul=E2=80=99s grabber!

 

I wonder if the distribution of the Earth loop=E2=80=99s radiation = pattern includes a somewhat higher percentage of higher elevation angles = (than with the five electric field antennas recently operating at 8270 = Hz), which could emphasize the process that Markus = described.

 

I think that Paul=E2=80=99s grabber=E2=80=99s 186 hour window with = the six ~ 8270 Hz signals including diurnals and coordination is = suitable for framing, a beautiful sight.

 

73,

 

Jim AA5BW =C2=A0

 

 

From:= = owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus = Vester
Sent: Saturday, December 29, 2018 8:55 AM
To: = rsgb_lf_group@blacksheep.org
Subject: Re: LF: VLF Carrier on = 8270.01 Hz from a ground loop antenna - The 6th station on Paul's = spectrogram

 

H= i Stefan,

strangely, nothing is visible here in N=C3=BCrnberg = now.

At DL0AO, the portable transmission (~ 280 km) appears to be = around 9 dB stronger compared to the institute in Heidelberg (~ 230 = km, reference measurement at 7:50 UT on Dec 27). However here = in N=C3=BCrnberg it seems to be the other way round: the = transmission from the institute (180 km) was strong  (up = to 20 dB SNR) all day, but the signal from the guiderails (230 = km) is completely invisible now. 

The explanation may = be that a sharp midday minimum exists at 230 km. Looking at DL0AO = traces, we can see that the signal from the institute indeed almost = disappeared at noon. During earlier Experiments it seemed that = the minimum was very pronounced on our 180 km path, but that was later = in the year around April and May. This seems to make sense, = as higher solar Illumination pushed the midday ionoshere further = dowen, requiring steeper skywave angle to arrive at the = same 3/2 lambda path difference for cancellation. 

Best = 73,
Markus (DF6NM)

-----Urspr=C3=BCngliche = Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
= An: rsgb_lf_group <rsgb_lf_group@blacksheep.org= >
Verschickt: Sa, 29. Dez 2018 13:45
Betreff: LF: VLF = Carrier on 8270.01 Hz from a ground loop antenna - The 6th station on = Paul's spectrogram

H= i VLF friends,

Since 11:35 UTC i'm running about 2.5 A antenna = current into my 900m
long ground loop antenna. Frequency is 8270.01 = Hz. The signal is very
strong on my own grabber in 57.6 km distance = but also at DF6NM, DL0AO
and it looks like there is a peak now on = Paul's spectrogram building up
slowly.
I intend to run the = carrier for 2 hours or so, until the accu is almost
empty :-)
The = H bridge PA voltage is 175 V and the power consumption is 450 = W.
Today, the DC measuremant result is 66V for 1 A antenna current. = It is
cold and wet!
More soon.

73 de DK7FC/P in = JN39WI

PS: The QRN is exceptional = low!!!!

<= o:p> 

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