Return-Path: Received: (qmail 80443 invoked from network); 2 Jan 2005 21:00:02 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore01.plus.net with SMTP; 2 Jan 2005 21:00:02 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1ClCnr-000I4B-7J for dave@picks.force9.co.uk; Sun, 02 Jan 2005 20:58:20 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1ClCnr-000I47-1W for dave@picks.force9.co.uk; Sun, 02 Jan 2005 20:58:19 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1ClCpV-000J9k-B3 for dave@picks.force9.co.uk; Sun, 02 Jan 2005 21:00:01 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ClCoN-0001Ug-S5 for rs_out_1@blacksheep.org; Sun, 02 Jan 2005 20:58:51 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ClCoN-0001UX-EU for rsgb_lf_group@blacksheep.org; Sun, 02 Jan 2005 20:58:51 +0000 Received: from m11.lax.untd.com ([64.136.30.74]) by relay.thorcom.net with smtp (Exim 4.41) id 1ClCoJ-000674-B0 for rsgb_lf_group@blacksheep.org; Sun, 02 Jan 2005 20:58:51 +0000 Received: from m11.lax.untd.com (localhost [127.0.0.1]) by m11.lax.untd.com with SMTP id AABA7S2D4ASQQX2A for (sender ); Sun, 2 Jan 2005 12:58:34 -0800 (PST) X-UNTD-OriginStamp: yokUgcxCbtTP7XLrpefewM0dVUUv3fe6oawotoBNt2x7R33QTdlVHg== Received: (from riese-k3djc@juno.com) by m11.lax.untd.com (jqueuemail) id KGDAKNBR; Sun, 02 Jan 2005 12:57:46 PST To: rsgb_lf_group@blacksheep.org Date: Sun, 2 Jan 2005 15:38:14 -0500 Message-ID: <20050102.155653.2604.0.riese-k3djc@juno.com> X-Mailer: Juno 5.0.13 MIME-Version: 1.0 X-Juno-Line-Breaks: 0-2,4,6-7,9,11,13,15-16 From: riese-k3djc@juno.com X-ContentStamp: 6:3:51817770 X-SPF-Result: relay.thorcom.net: domain of juno.com designates 64.136.30.74 as permitted sender X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,NO_REAL_NAME=0.178 Subject: Re: LF: Re: Power Line Rotation, & Auroral effects Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) Back in the days before electronic amplification telephone systems were peaked to work with less loss at around 1000 Hz. Made them tinny but at least you could hear the other person. Before multi cable all was open line and the lines were also crossed. This made them balanced as well as providing less noise coupling and the proper impedance for the transmission and less loss of the voice peaked at 1000 Hz. Before Digital switching ,,,trunk circuits were still toned out at 1000Hz . That is still a standard today but we no longer use open wire. So the idea that power lines and telephone lines are transmission lines holds true just like the transmission line used for RF . Bob K3DJC