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 w0BMaNNI003448 for ; Thu, 11 Jan 2018 23:36:26 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eZlMZ-0004RW-Hp for rs_out_1@blacksheep.org; Thu, 11 Jan 2018 22:30:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eZlMY-0004RN-Od for rsgb_lf_group@blacksheep.org; Thu, 11 Jan 2018 22:30:18 +0000 Received: from omr-a010e.mx.aol.com ([204.29.186.54]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1eZlMS-0007Yb-4e for rsgb_lf_group@blacksheep.org; Thu, 11 Jan 2018 22:30:17 +0000 Received: from mtaomg-aam01.mx.aol.com (mtaomg-aam01.mx.aol.com [172.27.19.147]) by omr-a010e.mx.aol.com (Outbound Mail Relay) with ESMTP id E74583800095 for ; Thu, 11 Jan 2018 17:30:08 -0500 (EST) Received: from core-acb06g.mail.aol.com (core-acb06.mail.aol.com [172.27.24.6]) by mtaomg-aam01.mx.aol.com (OMAG/Core Interface) with ESMTP id 870A838000081 for ; Thu, 11 Jan 2018 17:30:08 -0500 (EST) Received: from 188.194.222.230 by webjas-vad003.srv.aolmail.net (10.96.35.6) with HTTP (WebMailUI); Thu, 11 Jan 2018 17:30:08 -0500 Date: Thu, 11 Jan 2018 17:30:08 -0500 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <160e7583ebc-1717-5df8f@webjas-vad003.srv.aolmail.net> In-Reply-To: <15ed4f6be21-c03-49e19@webjas-vac187.srv.aolmail.net> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.194.222.230] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1515709808; bh=IDlXvLG9Bdgfbm+I7q9PkKa0VvZwFO/DnFkMreHtKPo=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=bwqJSRc2M43KGug9ZejJa6yGryI8muqR25GaqMeLZScOo8eC1W1gAggKgDjq+L9on 8xXvAKoSsN9G/246IgsVMdvhpWrNPDMO0U8Vtt7PqqnbK4c2kMCGzpEERByb+KXMwF ko8xwZ81+WE0Q3fD7uCi8PD36TaeqS8MDuyhtBIk= x-aol-sid: 3039ac1b13935a57e570791f X-Spam-Score: 0.0 (/) 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 the administrator of that system for details. Content preview: It looks like ZEVS (aka KPTF) is currently undergoing a period of increased activity. SNR at DL0AO is no significantly better than it used to be, so I suspect that transmit power might have been increased. In addition, we have now enabled a 20 Hz filter and a noiseblanker, which effectively suppresses local QRM bursts. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) 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: 34d483c57c7a6bf26c25db3c8765d5fc Subject: ELF: Recent ZEVS activity Content-Type: multipart/alternative; boundary="----=_Part_496218_417199690.1515709808315" 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 ------=_Part_496218_417199690.1515709808315 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable It looks like ZEVS (aka KPTF) is currently undergoing a period of increased= activity. SNR at DL0AO is no significantly better than it used to be, so I= suspect that transmit power might have been increased. In addition, we hav= e now enabled a 20 Hz filter and a noiseblanker, which effectively suppress= es local QRM bursts. We find that in addition to the traditional three-digit repeated telegrams = based on 4-minute dashes, there is also a much faster FSK mode with short d= ashes (about 10 or 12 seconds). These high-datarate sequences are always in= itiated by a long dash on the highest frequency, 83.2 Hz. Screenshots: http://df6nm.bplaced.net/dl0ao/files/zevs_7.63mHz_180111_2114.png http://df6nm.bplaced.net/dl0ao/files/zevs_183mHz_180108_0914.png DL0AO Grabber: http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao_test.htm See also: G3ZJO 2012-05-12: https://g3zjoradio.wordpress.com/2012/05/12/more-on-82hz-= radio-comms-zevs-13669381/ DL4YHF 2008-08-29: http://dl4yhf.darc.de/t/vlf_experiments.htm Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group Verschickt: So, 1. Okt 2017 0:44 Betreff: Re: ELF: ZEVS reception from a small loop Those ZEVS messages seem to consist of simple three-digit numbers. With 0.2= Hz spacing, the frequency ranges 81 to 81.8 and 82.2 to 83 Hz provide ten = possible MFSK symbols. Each message is sent twice, separated by a single 80= .8 Hz dash. Consecutive messages are always separated by the 82 Hz idle ton= e. Assuming that symbol frequencies are counted upwards from 0 to 4 and 5 to 9= , Stefan's screenshot would translate to ..7 486 128 731 941 473 018 =20 73, Markus =20 ... ------=_Part_496218_417199690.1515709808315 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
It looks like ZEVS (aka KPTF) is currently = undergoing a period of increased activity. SNR at DL0AO is no significantly= better than it used to be, so I suspect that transmit power might have bee= n increased. In addition, we have now enabled a 20 Hz filter and a noisebla= nker, which effectively suppresses local QRM bursts.
We find that in addition to the traditional three-digit re= peated telegrams based on 4-minute dashes, there is also a much faster FSK = mode with short dashes (about 10 or 12 seconds). These high-datarate sequen= ces are always initiated by a long dash on the highest frequency, 83.2 Hz.<= /div>

Screenshots:
http://df6nm.bplaced.net/= dl0ao/files/zevs_7.63mHz_180111_2114.png
http://df6nm.bplaced.net/dl0ao/= files/zevs_183mHz_180108_0914.png

DL0AO G= rabber:
http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao_test.= htm

See also:
G3ZJO 2012-05-12: https:= //g3zjoradio.wordpress.com/2012/05/12/more-on-82hz-radio-comms-zevs-1366938= 1/
DL4YHF 2008-08-29: http://dl4yhf.darc.de/t/vlf_experiments.htm
<= div style=3D"color: black; font-family: arial,helvetica,sans-serif; font-si= ze: 10pt;" abp=3D"2877">
Best 73,
Markus (DF6NM)



-----Urspr=C3= =BCngliche Mitteilung-----
Von: Markus Vester <markusve= ster@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacks= heep.org>
Verschickt: So, 1. Okt 2017 0:44
Betreff: Re: ELF: ZEVS reception from a small loop

Those ZEVS messages seem to consist of simple three-digi= t numbers. With 0.2 Hz spacing, the frequency ranges 81 to 81.8 and 82.2 to= 83 Hz provide ten possible MFSK symbols. Each message is se= nt twice, separated by a single 80.8 Hz dash. Consecutive me= ssages are always separated by the 82 Hz idle tone.

Assuming that symbol frequencies are counted upwards fr= om 0 to 4 and 5 to 9, Stefan's screenshot would translate to

..7 486 128   731    941 &= nbsp;      473   018
&nb= sp;
73, Markus  

...
------=_Part_496218_417199690.1515709808315--