Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.5 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_DNSWL_MED, SPF_PASS,T_DKIM_INVALID,URIBL_SBL,URIBL_SBL_A autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; 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+deb8u1) with ESMTP id v0MChiJ2004200 for ; Sun, 22 Jan 2017 13:43:46 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cVHQM-0004EL-30 for rs_out_1@blacksheep.org; Sun, 22 Jan 2017 12:39:10 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cVHQI-0004EC-LO for rsgb_lf_group@blacksheep.org; Sun, 22 Jan 2017 12:39:06 +0000 Received: from omr-a018e.mx.aol.com ([204.29.186.64]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1cVHQC-0002rU-B9 for rsgb_lf_group@blacksheep.org; Sun, 22 Jan 2017 12:39:05 +0000 Received: from mtaomg-laa01.mx.aol.com (mtaomg-laa01.mx.aol.com [172.27.2.99]) by omr-a018e.mx.aol.com (Outbound Mail Relay) with ESMTP id F283F38000B3 for ; Sun, 22 Jan 2017 07:38:56 -0500 (EST) Received: from core-acx01c.mail.aol.com (core-acx01.mail.aol.com [10.76.14.37]) by mtaomg-laa01.mx.aol.com (OMAG/Core Interface) with ESMTP id ADC7438000083 for ; Sun, 22 Jan 2017 07:38:55 -0500 (EST) Received: from 188.192.95.60 by webprd-m36.mail.aol.com (10.74.51.130) with HTTP (WebMailUI); Sun, 22 Jan 2017 07:38:55 -0500 Date: Sun, 22 Jan 2017 07:38:55 -0500 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <159c62fc0ff-2cc9-10eac@webprd-m36.mail.aol.com> In-Reply-To: <2f0a2072-2f9d-7029-39ed-6fc128535a02@virginbroadband.com.au> References: <2f0a2072-2f9d-7029-39ed-6fc128535a02@virginbroadband.com.au> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.95.60] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1485088736; bh=TAqxTQN6kmctbL81r2H1Df4x/ZOhc05wSUpQk33ZExw=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=WuHJm2o9zMwTDJuPC+g/RHVJ07D/45UUw+BJyvV60sP0R/gSuF2p7co1wRz0lflNp tIt4VFXyXmZJAU+E5hcNt/Zo+pJNrjbF9gaVr/N8wFs45Gv0cgkx6B1/geVHsXFZnG GH8aeIhx63h7gjRFUhxbccqcf6PkmMfL6aUpFRsc= x-aol-sid: 3039ac1b02635884a7df63eb X-Scan-Signature: b8b011f938af8abc4b241335cabd0691 Subject: Re: LF: ZEVS Content-Type: multipart/alternative; boundary="----=_Part_84098_2056024264.1485088735484" 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: 10285 ------=_Part_84098_2056024264.1485088735484 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Edgar, to say the truth, I don't know for sure. Eddie G3ZDO used to monitor ZEVS r= egularly, and a trace was present in June 2016: http://www.g3zjo.talktalk.n= et/vlfgrabber.htm . On the other hand, Renato's live grabber http://www.vlf= .it/cumiana/livedata.html currently shows nothing on 82 Hz (scroll down to = "Marconi Antenna + Geophone" ). Last time I looked myself was Sep 2014, and= ZEVS was easily captured then on an E-field antenna with a simple FET sour= ce-follower.=20 The classic Stanford paper http://www-ee.stanford.edu/~acfs/82Hz.pdf mentio= ns a fieldstrength measurement in Dunedin, New Zealand at -141 dB A/m (incl= uding a 1.5 dB correction for RX antenna orientation), and 13 dB SNR with 2= minute averaging. Assuming E/H =3D 377 ohm, the fieldstrength would be equ= ivalent to E =3D 34 uV/m. It may be slightly weaker in Tasmania due to less= focussuing gain further from the antipode.=20 Good luck if you want to try the experiment, I'm curious to learn wether yo= u can find ZEVS down under! Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: edgar An: rsgb_lf_group Verschickt: Sa, 21. Jan 2017 11:06 Betreff: LF: ZEVS Is the Zevs transmitter active? Regards, Edgar Moonah,Tasmania. ------=_Part_84098_2056024264.1485088735484 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Edgar,

to say the truth, I don't know for sure= . Eddie G3ZDO used to monitor ZEVS regularly, and a trace was&nbs= p;present in June 2016: http://www.g3zjo.talktalk.net/vlfgrabber.= htm . On the other hand, Renato's live grabber http://www.vlf.it/cumiana/li= vedata.html currently shows nothing on 82 Hz (scroll down to "Mar= coni Antenna + Geophone" ). Last time I looked myself was Sep&nbs= p;2014, and ZEVS was easily captured then on an E-field antenna w= ith a simple FET source-follower.

The classic Stanford paper h= ttp://www-ee.stanford.edu/~acfs/82Hz.pdf mentions a fieldstrength = ;measurement in Dunedin, New Zealand at -141 dB A/m (including a 1.5 dB cor= rection for RX antenna orientation), and 13 dB SNR with 2 minute averaging.=  Assuming E/H =3D 377 ohm, the fieldstrength would be equivalent&= nbsp;to E =3D 34 uV/m. It may be slightly weaker in Tasmania due to le= ss focussuing gain further from the antipode.

Good luck i= f you want to try the experiment, I'm curious to learn wether you can = find ZEVS down under!

Best 73,
Markus (DF6NM)

-----Urspr= =C3=BCngliche Mitteilung-----
Von: edgar <edgarjtwining@virginbroadb= and.com.au>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>Verschickt: Sa, 21. Jan 2017 11:06
Betreff: LF: ZEVS


Is the Zevs transmitter active?

Regards, Edgar
Moonah,Tasmania.

 =20
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