Return-Path: Received: (qmail 24297 invoked from network); 5 Nov 2001 20:45:24 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Nov 2001 20:45:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 9509 invoked from network); 5 Nov 2001 20:45:17 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 5 Nov 2001 20:45:17 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 160qVA-0002A0-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 05 Nov 2001 20:37:48 +0000 Received: from smtp1.libero.it ([193.70.192.51]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 160qV9-00029v-00 for rsgb_lf_group@blacksheep.org; Mon, 05 Nov 2001 20:37:47 +0000 Received: from ath650 (151.20.94.166) by smtp1.libero.it (6.0.032) id 3BD437D50041EE68 for rsgb_lf_group@blacksheep.org; Mon, 5 Nov 2001 21:36:59 +0100 Message-ID: <4.1.20011105140934.019268f0@pop.tiscalinet.it> Message-ID: <4.1.20011105140934.019268f0@pop.tiscalinet.it> X-Sender: IK1ODO@popmail.libero.it X-Mailer: QUALCOMM Windows Eudora Pro Versione 4.1 Data: Mon, 05 Nov 2001 21:36:54 +0100 To: rsgb_lf_group@blacksheep.org From: "Marco Bruno" Subject: Re: LF: Re: spectrum 136kHz I2PHD/dj8wx In-reply-to: <3BE66466.F1BDFE8D@usa.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Date: Mon, 05 Nov 2001 20:37:47 +0000 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In 15.04 05/11/01 , Alberto wrote: >I asked my neighbors, but nobody has an ISDN line here. Just plain old analog. >But ADSL and ISDN can be found in a nearby town, about 5 km from here. >Given that today all telephone lines are buried, I am a bit skeptical about the >possibility to receive the 17th harmonic of a signal passing in a buried line >five kilometers from here. But in my life I have learnt that often reality >defies intuition and reasoning... > That's puzzling me... I remeber discussing about those spectral lines three years ago on the reflector! I will try to connect a spectrum analyzer (or an RX with Argo) to my phone lines, and see if there is any residual of 8 kHz harmonics. My lines are analogic, but in the central exchange they are, by sure, digitized at 8kHz rate... some digital buzz may leak out. Differential or common mode? who knows... 73 - Marco IK1ODO