Return-Path: 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 ) 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 To: rsgb_lf_group@blacksheep.org Message-id: 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" 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 T-Online eMail
 
-Tu Markus and Ha-jo
Henny pa3cpm
best 73s
 
 
 
---- Original Message -----
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 -----
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)--