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 w0C0RH94003831 for ; Fri, 12 Jan 2018 01:27:18 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eZn7P-00058F-JL for rs_out_1@blacksheep.org; Fri, 12 Jan 2018 00:22:47 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eZn7O-000586-Ow for rsgb_lf_group@blacksheep.org; Fri, 12 Jan 2018 00:22:46 +0000 Received: from rgout0703.bt.lon5.cpcloud.co.uk ([65.20.0.143]) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1eZn7K-00087P-Ga for rsgb_lf_group@blacksheep.org; Fri, 12 Jan 2018 00:22:45 +0000 X-OWM-Source-IP: 86.186.115.212 (GB) X-OWM-Env-Sender: alan.melia@btinternet.com X-Junkmail-Premium-Raw: score=12/50,refid=2.7.2:2018.1.12.316:17:12.731,ip=,rules=__HAS_MSGID, __SANE_MSGID, MSGID_32HEX_LC, INVALID_MSGID_NO_FQDN, __MSGID_32HEX, __HAS_FROM, __FRAUD_WEBMAIL_FROM, __TO_MALFORMED_2, __TO_NO_NAME, __REFERENCES, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __MIME_VERSION, __CT, __CTYPE_MULTIPART_ALT, __CTYPE_HAS_BOUNDARY, __CTYPE_MULTIPART, __HAS_X_PRIORITY, __HAS_MSMAIL_PRI, __HAS_X_MAILER, USER_AGENT_OE, __OUTLOOK_MUA_1, __USER_AGENT_MS_GENERIC, __MIME_TEXT_P2, __MIME_TEXT_H2, __ANY_URI, __HTTPS_URI, __URI_WITH_PATH, LINK_TO_IMAGE, URI_ENDS_IN_HTML, __FRAUD_BODY_WEBMAIL, __URI_NO_WWW, __FRAUD_REFNUM, __CP_URI_IN_BODY, __STOCK_PHRASE_1, __SUBJ_ALPHA_NEGATE, SUPERLONG_LINE, __MULTIPLE_URI_TEXT, __URI_IN_BODY, __URI_NOT_IMG, __MULTIPLE_URI_HTML, __HTML_AHREF_TAG, __STYLE_RATWARE_NEG, __URI_WITHOUT_PATH, __STYLE_TAG, __HAS_HTML, __HTML_TAG_DIV, BODY_SIZE_10000_PLUS, BODYTEXTH_SIZE_3000_MORE, BODYTEXTH_SIZE_10000_LESS, __MIME_TEXT_H1, __MIME_TEXT_P1, __MIME_HTML, __TAG_EXISTS_HTML, __URI_NS, HTML_50_70, __FRAUD_WEBMAIL, __OUTLOOK_MUA, __FRAUD_COMMON, __MIME_TEXT_H, __MIME_TEXT_P, FORGED_MUA_OUTLOOK, REFERENCES Received: from gnat (86.186.115.212) by rgout07.bt.lon5.cpcloud.co.uk (9.0.019.13-1) (authenticated as alan.melia@btinternet.com) id 5A3AE1CD02011236 for rsgb_lf_group@blacksheep.org; Fri, 12 Jan 2018 00:22:41 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1515716562; bh=05d6BmfrRmrh09ts9zge4ENvqesqLJjaWe+iXgmBgAM=; h=Message-ID:From:To:References:Subject:Date:MIME-Version:X-Mailer; b=oScLfR03QFgzs8Ympyqjvzs9GiMeiNnP9WIsEufqT3uiuMioYaG+l8zLXzfY4Fn3cYYWu6oR3jk+K6AGl3+zAwp4haloJPIvqC+YwwMYvCw7hHzH+kkq0pO/lmZv00tHCExT2Pl1ke9pUijrQ4JlHnGQJ/OyiLWKISvpXjO4khM= Message-ID: <452878166AE841D89E16CA5D30D0D32E@gnat> From: "Alan Melia" To: References: <160e7583ebc-1717-5df8f@webjas-vad003.srv.aolmail.net> <160e79c257f-1717-5101@webjas-vae239.srv.aolmail.net> Date: Fri, 12 Jan 2018 00:22:21 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 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: Yes the skin depth is a point. I was thinking of frozen ground compared with (these days) melting perma-frost, or should we call it imperma-frost :-)) Could be less Rouble trouble the price of oil is rising. Alan G3NYK ----- Original Message ----- From: Markus Vester To: rsgb_lf_group@blacksheep.org Sent: Thursday, January 11, 2018 11:44 PM Subject: Re: LF: Re: Recent ZEVS activity [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 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: 640db27bf4e79f20c339a3df4106c3a6 Subject: Re: LF: Re: Recent ZEVS activity Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D3_01D38B3B.699DB1B0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.1 required=5.0 tests=FORGED_MUA_OUTLOOK,HTML_40_50, 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 This is a multi-part message in MIME format. ------=_NextPart_000_00D3_01D38B3B.699DB1B0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Yes the skin depth is a point. I was thinking of frozen ground compared = with (these days) melting perma-frost, or should we call it = imperma-frost :-)) Could be less Rouble trouble the price of oil is = rising. Alan G3NYK ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, January 11, 2018 11:44 PM Subject: Re: LF: Re: Recent ZEVS activity Hi Alan, don't know for sure, but I think the depth of seasonal temperature = changes in the ground (a few meters at best) would be much shallower = than the ELF skin depth (a kilometer) in the highly resistive rock bed. = I rather tend to believe that some energy is being saved by switching to = a lower "standby" current during times of less submarine activity. Best 73, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Alan Melia An: rsgb_lf_group Verschickt: Fr, 12. Jan 2018 0:31 Betreff: LF: Re: Recent ZEVS activity =EF=BB=BF=20 Hi Markus is there a possibility that hard frozen ground at the tx = site might give an increase in ERP? Alan G3NYK ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, January 11, 2018 10:30 PM Subject: ELF: Recent ZEVS activity It looks like ZEVS (aka KPTF) is currently undergoing a period of = increased activity. SNR at DL0AO is now 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. 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 dashes (about 10 or 12 seconds). These high-datarate = sequences are always initiated 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 tone. 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 ... ------=_NextPart_000_00D3_01D38B3B.699DB1B0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Yes the skin depth is a point. I was = thinking of=20 frozen ground compared with (these days) melting perma-frost, or should=20 we call it imperma-frost :-)) Could be less Rouble trouble the = price=20 of oil is rising.
Alan
G3NYK
----- Original Message -----
From:=20 Markus=20 Vester
Sent: Thursday, January 11, = 2018 11:44=20 PM
Subject: Re: LF: Re: Recent = ZEVS=20 activity

Hi Alan,

don't know for sure, but I think the depth = of=20 seasonal temperature changes in the ground (a few meters at = best) would=20 be much shallower than the ELF skin depth (a kilometer) in the highly=20 resistive rock bed. I rather tend to believe that some=20 energy is being saved by switching to = a lower "standby"=20 current during times of less submarine activity.

Best = 73,
Markus


-----Urspr=C3=BCngliche = Mitteilung----- Von: Alan Melia <alan.melia@btinternet.com>
An:=20 rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt:=20 Fr, 12. Jan 2018 0:31
Betreff: LF: Re: Recent ZEVS = activity
=EF=BB=BF =
Hi Markus is = there a=20 possibility that hard frozen ground at the tx site might give an = increase in=20 ERP?
Alan
G3NYK
 
----- Original Message -----
From: Markus Vester
Sent: Thursday, January 11, 2018 = 10:30 PM
Subject: ELF: Recent ZEVS = activity

It looks like ZEVS (aka KPTF) is currently undergoing a = period of=20 increased activity. SNR at DL0AO is now = significantly=20 better than it used to be, so I suspect that transmit power might = have been=20 increased. In addition, we have now enabled a 20 Hz filter and a=20 noiseblanker, which effectively suppresses local QRM bursts.
We find that in addition to the traditional = three-digit=20 repeated telegrams based on 4-minute dashes, there is also a much = faster FSK=20 mode with short dashes (about 10 or 12 seconds). These high-datarate = sequences are always initiated by a long dash on the highest = frequency, 83.2=20 Hz.
Screenshots:
http://df6nm.bplaced.net/dl0ao/files/zevs_7.63mHz_180111_2114= .pnghttp://df6nm.bplaced.net/dl0ao/files/zevs_183mHz_180108_0914.= png
DL0AO Grabber:
http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao_te= st.htm
See also:
G3ZJO = 2012-05-12: https://g3zjoradio.wordpress.com/2012/05/12/more-on-82hz-radi= o-comms-zevs-13669381/DL4YHF 2008-08-29: http://dl4yhf.darc.de/t/vlf_experiments.htm
Best 73,
Markus = (DF6NM)


-----Urspr=C3=BCngliche=20 Mitteilung-----
Von: Markus Vester <markusvester@aol.com>An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So,=20 1. Okt 2017 0:44
Betreff: Re: ELF: ZEVS reception = from a small=20 loop

Those ZEVS messages seem to consist of simple = three-digit numbers.=20 With 0.2 Hz spacing, the frequency ranges 81 to 81.8 and 82.2 to 83=20 Hz provide ten possible MFSK symbols. Each message is = sent=20 twice, separated by a single 80.8 Hz = dash. Consecutive=20 messages are always separated by the 82 Hz idle tone.
Assuming that symbol frequencies are counted = upwards=20 from 0 to 4 and 5 to 9, Stefan's screenshot would translate = to
..7 486 128   731  =   941=20        473   018 
73, Markus  
...
= ------=_NextPart_000_00D3_01D38B3B.699DB1B0--