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 w8A6OpE8024052 for ; Mon, 10 Sep 2018 08:24:54 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fzFXq-0008QG-AN for rs_out_1@blacksheep.org; Mon, 10 Sep 2018 07:19:34 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fzFXn-0008Q7-KE for rsgb_lf_group@blacksheep.org; Mon, 10 Sep 2018 07:19:31 +0100 Received: from resqmta-ch2-04v.sys.comcast.net ([2001:558:fe21:29:69:252:207:36]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fzFXk-0008C8-Un for rsgb_lf_group@blacksheep.org; Mon, 10 Sep 2018 07:19:30 +0100 Received: from resomta-ch2-03v.sys.comcast.net ([69.252.207.99]) by resqmta-ch2-04v.sys.comcast.net with ESMTP id zFXhffNSQlHCvzFXjfxEXq; Mon, 10 Sep 2018 06:19:27 +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=1536560367; bh=K7NjfHSciajZoa+RLQiGMbNnlMuXsExqPyL946FofxQ=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=JFMeK3bH6uGsV8MuJo1iz/+hENfTR4a8SyBOpr545jh2HBQPJHFNYucaQ053qjvc3 PgWhgysMxqFWPToPSuXmwkFPtAtF0lVdZh7E/GdYGAAqENe/a5NCht8du2UbB1set5 gDgMPEbcekOADj/KJiZpBz4y+hhgKDlxbK89RnAOp4Gwc0/R6PD7p3Gw77ynUmsf1D JDFXNOVODZAfro7JVbmdHEB0Q88Nj9RZLlelhTl9Hy0Wrx3BG5lulNfIXFsruzldIC So8k134Rbkcgp1Wie0McySXGfe0RRzHm6BxcJ9rE6MF3rtHZNc9IPkT6XgFvTErmAC XwxNCHysCy9RQ== Received: from Owner ([IPv6:2601:140:8500:7f9f:a593:49:2f36:f121]) by resomta-ch2-03v.sys.comcast.net with ESMTPA id zFXgfnWzzh56uzFXhfgu2n; Mon, 10 Sep 2018 06:19:26 +0000 From: To: References: <5B94344B.3030503@posteo.de> <165bb2c1d17-1ebb-76dc@webjasstg-vaa41.srv.aolmail.net> In-Reply-To: <165bb2c1d17-1ebb-76dc@webjasstg-vaa41.srv.aolmail.net> Date: Mon, 10 Sep 2018 02:19:24 -0400 Message-ID: <006701d448ce$391ad670$ab508350$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQJjSrBnmXhBveA/7wKh6AenyqXHM6PK9Cxg Content-Language: en-us X-CMAE-Envelope: MS4wfEvNaWXx1KqoQ8KprvCVvAkBMio2JF7Qz16/3WDH2U5EAIlHNQfbpzU3BWU2f+286J3hWwAsSselv1HdMhwZvpPBpD/TbVMP5RyuLiwZbjwya2PITTmu 3IJlo+M/WMH+Cas53S5d50VI/qf7OXB8XnWxPsmDDYcy0NvAW41njC9NknRrxAhmqxXKiou/ke/XEhLunKzMncAsEv0cRHGHNgPxFZwkdXSJncqHDbndsGi6 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: Hello Markus, Stefan, Paul, Is there any way of guessing the ERP of the 1570 Hz (or 2970 Hz) earth-loop tests last week? I noticed that ERP/wallplug-power efficiency of the Norway (Dazey) test at 1280 Hz might extrapolate to about 2E-8 with 1 km between electrodes (with ~ 20 ohm electrode-to-earth resistance); and though it might be informative to compare. [...] 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:fe21:29:69:252:207:36 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hvanesce[at]comcast.net) -0.0 SPF_PASS SPF: sender matches SPF record -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 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: 7a302ec14fb4a62f16f049454b6dc54d Subject: RE: LF: Re: 137 kHz WSPR-2 on a 900m long ground loop, this weekend Content-Type: multipart/alternative; boundary="----=_NextPart_000_0068_01D448AC.B20A6EF0" 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_0068_01D448AC.B20A6EF0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello Markus, Stefan, Paul, =20 Is there any way of guessing the ERP of the 1570 Hz (or 2970 Hz) = earth-loop tests last week? =20 I noticed that ERP/wallplug-power efficiency of the Norway (Dazey) test = at 1280 Hz might extrapolate to about 2E-8 with 1 km between electrodes = (with ~ 20 ohm electrode-to-earth resistance); and though it might be = informative to compare. =20 =20 73, =20 Jim AA5BW =20 =20 From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus Vester Sent: Saturday, September 8, 2018 5:53 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: 137 kHz WSPR-2 on a 900m long ground loop, this = weekend =20 Hi Stefan, indeed your signal has been very consistent around 5 uV/m and -8 to -10 = dB in the afternoon. At 230 km range, this would indicate a radiated = power around 40 mW (EMRP), or 0.4% antenna efficiency. Around nightfall, = heavy QSB set in, with occaional minima where the signal fell below the = decode threshold but was still ghastly visible in the waterfall with = heavy RDF colour aberrations. I suspect that the diplole emits more high = angle radiation than a vertical, possibly leading to deeper fading at = intermediate ranges.=20 Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: DK7FC An: rsgb_lf_group Verschickt: Sa, 8. Sept 2018 22:45 Betreff: Re: LF: Re: 137 kHz WSPR-2 on a 900m long ground loop, this = weekend Thanks to the many stations beeing RX-active on LF WSPR tonite. It is very strange, the SNR reported by the stations below 500 km=20 distance was very good in daytime but now at night there are not more=20 stations receiving me, except 2 reports by 2E0ILY. Also the software just reports JN39 instead of JN39WI. Maybe some reports are not uploaded or shown on the database, because of = conflicting locators for the same callsign? I can hardly imagine that nothing comes through at night. Very odd. Does someone have an explanation what can cause these good results=20 during the day and such bad results at night? 73, Stefan PS: My QRG is 137.425 kHz and starts each xx:x0 (each 10 minutes). Maybe = someone can see somethning on the waterfall display? ... ------=_NextPart_000_0068_01D448AC.B20A6EF0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hello Markus, Stefan, Paul,

 

Is there any way of guessing the ERP of the 1570 Hz (or 2970 Hz) = earth-loop tests last week?

 

I noticed that ERP/wallplug-power efficiency of the Norway (Dazey) = test at 1280 Hz might extrapolate to about 2E-8 with 1 km between = electrodes (with ~ 20 ohm electrode-to-earth resistance); and though it = might be informative to compare. =C2=A0

 

73,

 

Jim AA5BW

 

 

From:= = owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus = Vester
Sent: Saturday, September 8, 2018 5:53 PM
To: = rsgb_lf_group@blacksheep.org
Subject: Re: LF: Re: 137 kHz = WSPR-2 on a 900m long ground loop, this weekend

 

H= i Stefan,

indeed your signal has been very consistent around = 5 uV/m and -8 to -10 dB in the afternoon. At 230 km range, this would = indicate a radiated power around 40 mW (EMRP), or 0.4% antenna = efficiency. Around nightfall, heavy QSB set in, with occaional minima = where the signal fell below the decode threshold but was still = ghastly visible in the waterfall with heavy RDF colour = aberrations. I suspect that the diplole emits more high angle = radiation than a vertical, possibly leading to deeper = fading at intermediate ranges. 

Best 73,
Markus = (DF6NM)

-----Urspr=C3=BCngliche Mitteilung-----
Von: DK7FC = <selberdenken@posteo.de>
= An: rsgb_lf_group <rsgb_lf_group@blacksheep.org= >
Verschickt: Sa, 8. Sept 2018 22:45
Betreff: Re: LF: Re: = 137 kHz WSPR-2 on a 900m long ground loop, this = weekend

T= hanks to the many stations beeing RX-active on LF WSPR tonite.

It = is very strange, the SNR reported by the stations below 500 km =
distance was very good in daytime but now at night there are not = more
stations receiving me, except 2 reports by 2E0ILY.
Also the = software just reports JN39 instead of JN39WI.
Maybe some reports are = not uploaded or shown on the database, because of
conflicting = locators for the same callsign?
I can hardly imagine that nothing = comes through at night. Very odd.
Does someone have an explanation = what can cause these good results
during the day and such bad = results at night?

73, Stefan

PS: My QRG is 137.425 kHz and = starts each xx:x0 (each 10 minutes). Maybe
someone can see = somethning on the waterfall = display?
...

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