Return-Path: <owner-rsgb_lf_group@blacksheep.org> Received: from rly-ma08.mx.aol.com (rly-ma08.mail.aol.com [172.20.116.52]) by air-ma02.mail.aol.com (v123.3) with ESMTP id MAILINMA022-8c249afe30a67; Thu, 05 Mar 2009 09:35:17 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma08.mx.aol.com (v123.3) with ESMTP id MAILRELAYINMA084-8c249afe30a67; Thu, 05 Mar 2009 09:34:53 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LfEca-0004YO-Km for rs_out_1@blacksheep.org; Thu, 05 Mar 2009 14:32:24 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LfEca-0004YF-4g for rsgb_lf_group@blacksheep.org; Thu, 05 Mar 2009 14:32:24 +0000 Received: from psmtp08.wxs.nl ([195.121.247.22]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from <cpm@planet.nl>) id 1LfEcY-0008IQ-TP for rsgb_lf_group@blacksheep.org; Thu, 05 Mar 2009 14:32:24 +0000 Received: from ns94d01ae4d850 (ip51cc8b9f.speed.planet.nl [81.204.139.159]) by psmtp08.wxs.nl (iPlanet Messaging Server 5.2 HotFix 2.15 (built Nov 14 2006)) with SMTP id <0KG100EDSF0ICZ@psmtp08.wxs.nl> for rsgb_lf_group@blacksheep.org; Thu, 05 Mar 2009 15:31:30 +0100 (MET) Date: Thu, 05 Mar 2009 15:31:29 +0100 From: henny van elst <cpm@planet.nl> To: rsgb_lf_group@blacksheep.org Message-id: <E016D602229846DD9B026C02E03B3C3E@ns94d01ae4d850> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-Priority: 3 X-MSMail-priority: Normal References: <1Lf1BU-0Vc4bw0@fwd01.t-online.de> X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Re: capture 67hz.jpg Content-type: multipart/alternative; boundary="Boundary_(ID_oLSa5gGCHHkr6LXNa8cNOw)" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=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 X-AOL-IP: 193.82.116.20 --Boundary_(ID_oLSa5gGCHHkr6LXNa8cNOw) Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7BIT T-Online eMail -Tu Markus and Ha-jo Henny pa3cpm best 73s ---- Original Message ----- From: hajo.brandt.dj1zb@t-online.de To: rsgb_lf_group@blacksheep.org Sent: Thursday, March 05, 2009 1:11 AM Subject: Re: LF: Re: capture 67hz.jpg "Markus Vester" <markusvester@aol.com> schrieb: Dear Henny, my QTH is about 400 m from a railway line, and I regularly saw their 16.667 Hz power frequency and several ELF harmonics. The E-fields are relatively strong as the lines normally do not carry a grounded top wire for lightning protection. The "modulation" could be caused by some switching activity. Another origin might be a controlled rectifier on the 50 Hz mains, which could be triggered at a subharmonic frequency. Best regards, Markus, DF6NM Dear Markus, I have even thougth that this "67Hz" in reality might have been 66.667 Hz, and this would open other ideas, such as mixer products between 50 Hz and 16,667 Hz etc. HW? 73 Ha-Jo, DJ1ZB ----- Original Message ----- From: henny van elst To: blacksheep Sent: Wednesday, March 04, 2009 7:43 PM Subject: LF: capture 67hz.jpg Hi,Lf capture unid signal 67hz,but who ? henny pa3cpm best 73s ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.7/1983 - Release Date: 03/04/09 07:41:00 --Boundary_(ID_oLSa5gGCHHkr6LXNa8cNOw) Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 7BIT <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd"> <HTML><HEAD><TITLE>T-Online eMail</TITLE> <META http-equiv=Content-Type content="text/html; charset=ISO-8859-1"><!-- <div background-color: #ffffff; background-repeat:repeat; margin-left:0cm; margin-right:0cm"> --> <META content="MSHTML 6.00.6000.20973" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY vLink=#000000 aLink=#000080 link=#000000 bgColor=#ffffff leftMargin=0 topMargin=0 marginheight="0" marginwidth="0"> <DIV><FONT face=Arial size=2></FONT> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">-Tu Markus and Ha-jo</DIV> <DIV style="FONT: 10pt arial">Henny pa3cpm</DIV> <DIV style="FONT: 10pt arial">best 73s</DIV> <DIV style="FONT: 10pt arial"> </DIV> <DIV style="FONT: 10pt arial"> </DIV> <DIV style="FONT: 10pt arial"> </DIV> <DIV style="FONT: 10pt arial">---- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=hajo.brandt.dj1zb@t-online.de href="mailto:hajo.brandt.dj1zb@t-online.de">hajo.brandt.dj1zb@t-online.de</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=rsgb_lf_group@blacksheep.org href="mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, March 05, 2009 1:11 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: LF: Re: capture 67hz.jpg</DIV> <DIV><BR></DIV><FONT face=Arial color=#000000 size=3> </FONT> "Markus Vester" <<A href="mailto:markusvester@aol.com">markusvester@aol.com</A>> schrieb: <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV><FONT face=Arial size=2>Dear Henny,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>my QTH is about 400 m from a railway line, and I regularly saw their 16.667 Hz power frequency and several ELF harmonics. The E-fields are relatively strong as the lines normally do not carry a grounded top wire for </FONT><FONT face=Arial size=2>lightning protection. The "modulation" could be caused by some switching activity.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Another origin might be a controlled rectifier on the 50 Hz mains, which could be triggered at a subharmonic frequency.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Best regards,</FONT></DIV> <DIV><FONT face=Arial size=2>Markus, DF6NM</FONT></DIV> <DIV><FONT face=Arial size=2><BR><BR>Dear Markus,<BR><BR>I have even thougth that this "67Hz" in reality might have been 66.667 Hz, and this would open other ideas, such as mixer products between 50 Hz and 16,667 Hz etc.<BR><BR>HW?<BR><BR>73 Ha-Jo, DJ1ZB <BR><BR></FONT></DIV> <DIV>----- Original Message ----- </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=cpm@planet.nl href="mailto:cpm@planet.nl">henny van elst</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=rsgb_lf_group@blacksheep.org href="mailto:rsgb_lf_group@blacksheep.org">blacksheep</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, March 04, 2009 7:43 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> LF: capture 67hz.jpg</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Hi,Lf</FONT></DIV> <DIV><FONT face=Arial size=2>capture unid signal 67hz,but who ?</FONT></DIV> <DIV><FONT face=Arial size=2>henny pa3cpm</FONT></DIV> <DIV><FONT face=Arial size=2>best 73s</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE><FONT face=Arial color=#000000 size=3> </FONT> <DIV></DIV> <P> <HR> <P></P><BR>No virus found in this incoming message.<BR>Checked by AVG - www.avg.com <BR>Version: 8.0.237 / Virus Database: 270.11.7/1983 - Release Date: 03/04/09 07:41:00<BR></BLOCKQUOTE></BODY></HTML> --Boundary_(ID_oLSa5gGCHHkr6LXNa8cNOw)--