Return-Path: Received: (qmail 15222 invoked from network); 21 Jun 2002 22:50:09 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 21 Jun 2002 22:50:09 -0000 Received: (qmail 9550 invoked by uid 10001); 21 Jun 2002 22:54:08 -0000 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 21 Jun 2002 22:54:07 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17LX8o-0003kH-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Jun 2002 23:44:30 +0100 Received: from barry.mail.mindspring.net ([207.69.200.25]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17LX8n-0003kC-00 for rsgb_lf_group@blacksheep.org; Fri, 21 Jun 2002 23:44:29 +0100 Received: from 216-40-174-132.rochester.tir.com ([216.40.174.132] helo=wfs) by barry.mail.mindspring.net with smtp (Exim 3.33 #1) id 17LX8i-0005xZ-00 for rsgb_lf_group@blacksheep.org; Fri, 21 Jun 2002 18:44:24 -0400 Message-ID: <00a601c21975$32e60a80$0300a8c0@wfs> From: "WD8ARZ" To: rsgb_lf_group@blacksheep.org Subject: LF: More Info? - Re: Strange signals on 25 Hz (!) - any info ? Date: Fri, 21 Jun 2002 18:44:23 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: A friend of mine had some interesting comments. Could those that are hearing these signals please comment on the locations where they are receiving from? Also what kind of receiver and antenna system if you dont mind. This has generated some real interest. Thanks 73 from Bill - WD8ARZ wd8arz@ix.netcom.com ----- Original Message ----- From: "Leslie" To: "'Mike Miller'" ; "WD8ARZ" Cc: "ROBERT M. SCHULTZ" ; "'starrmorgan'" ; "Wayne Erickson" Sent: Friday, June 21, 2002 16:30 Subject: RE: Fw: Strange signals on 25 Hz (!) - any info ? 25 HZ is the frequency of the electric rail lines. Penn Central had a lot of 25 HZ lines in operation until they tore down most of the over head lines and went all diesel back in the 70's. They used to modulate the 'hi-lines' for track signals and even communications to the engines. The engine communication was before a lot of VHF radios were installed. Where do these people who are picking this up live? If near any type of AC rail line of the old style with the over head lines, chances are they are hearing that carrier with control signal modulation. If they are far away then it is something else, maybe sub commands or who knows. I guess I'll have to fire up a amp with low frequency response and see what is out there. If I hear anything then it is being transmitted through the air and not on rail hi-lines. I'm going to be heading to Dulce shortly. The road was open the last I checked so it will be a 7 to 8 hour trip. After I finish this mail, I'll be QRT here. I have the HF rig with me and will come up on 18.153 if I get a chance. Leslie