Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma01.r1000.mx.aol.com (Internet Inbound) with ESMTP id AC38638000098; Tue, 4 Dec 2012 09:40:32 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TftKA-00018J-2g for rs_out_1@blacksheep.org; Tue, 04 Dec 2012 14:18:14 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TftK9-00018A-Li for rsgb_lf_group@blacksheep.org; Tue, 04 Dec 2012 14:18:13 +0000 Received: from authsmtp08.register.it ([81.88.48.58] helo=authsmtp.register.it) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TftK4-00055K-Ew for rsgb_lf_group@blacksheep.org; Tue, 04 Dec 2012 14:18:12 +0000 Received: (qmail 23828 invoked from network); 4 Dec 2012 14:17:31 -0000 Received: from unknown (HELO ?192.168.1.15?) (smtp@netlabitalia.it@84.253.164.108) by authsmtp.register.it with ESMTPA; 4 Dec 2012 14:17:31 -0000 References: <7E7DFBB4D102A04DB5ADC88D66628A4A0FB5C6C9@ICTS-S-MBX5.luna.kuleuven.be> <20121204090348.994B5285203@for01.foreach.it> <20121204135810.754202853D6@for01.foreach.it> Mime-Version: 1.0 (1.0) In-Reply-To: <20121204135810.754202853D6@for01.foreach.it> Message-Id: <29BB0E10-346C-4122-98B5-163D2F34931D@arimi.it> Cc: "rsgb_lf_group@blacksheep.org" X-Mailer: iPhone Mail (10A403) From: IZ2JGB Date: Tue, 4 Dec 2012 15:17:29 +0100 To: "rsgb_lf_group@blacksheep.org" X-HELO-Warning: Remote host 81.88.48.58 (authsmtp08.register.it) used invalid HELO/EHLO authsmtp.register.it - verification failed X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: hi all. PLC over HV lines WAS used in the past. then, after the internet age, the national main distributor has switched to fiber optics. instead is still used to control read the meters in our houses, like it has been done in the us ( with a lot of joy ) [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [81.88.48.58 listed in list.dnswl.org] X-Scan-Signature: e6de17d69e46ff4ea8db042ef2cd7e46 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Subject: Re: LF: RE: 137kHz Rules and Regs X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=TO_ADDRESS_EQ_REAL 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-global-disposition: G x-aol-sid: 3039ac1d600950be0b602ad2 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none hi all. PLC over HV lines WAS used in the past. then, after the internet age, the national main distributor has switched to fiber optics. instead is still used to control read the meters in our houses, like it has=20 been done in the us ( with a lot of joy ) But the ham 137 khz is so small to disrupt operation in this system, that , as far as i know , is frequency agile. 73, IZ2JGB Giorgio Inviato da iPhone Il giorno 04/dic/2012, alle ore 14:57, Marco IK1ODO -2 h= a scritto: > At 14:29 04-12-12, you wrote: >> Hi Marco, >> Thanks for the note about PLC. I suspect that the utilities here >> are using some very old equipment and are reluctant to change it. This >> is a shame since many times there have been reports about the >> vulnerability of the power grid (mostly concerning hacking), yet there >> is a resistance to change. Very odd. >>=20 >> 73 Warren K2ORS >=20 > PLC in LW band is used widely in Italy on HV lines, but I never heard of Q= RM. Very few active stations, however, and all (AFAIK) are far from power li= nes. >=20 > Marco IK1ODO / AI4YF >=20 >=20