X-GM-THRID: 1207443031266617496 X-Gmail-Labels: rsgb lf X-Gmail-Received: 3a232ee10c6fad7abbc85c44f5f9fa62041cd787 Delivered-To: daveyxm@gmail.com Received: by 10.64.249.17 with SMTP id w17cs232753qbh; Wed, 28 Jun 2006 08:10:07 -0700 (PDT) Received: by 10.49.72.6 with SMTP id z6mr794829nfk; Wed, 28 Jun 2006 08:10:07 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id y24si8450613nfb.2006.06.28.08.10.06; Wed, 28 Jun 2006 08:10:07 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1FvbaV-00032G-W4 for rs_out_1@blacksheep.org; Wed, 28 Jun 2006 16:04:19 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1FvbaV-000327-Gw for rsgb_lf_group@blacksheep.org; Wed, 28 Jun 2006 16:04:19 +0100 Received: from pih-relay05.plus.net ([212.159.14.132]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1FvbaR-0004rG-IE for rsgb_lf_group@blacksheep.org; Wed, 28 Jun 2006 16:04:19 +0100 Received: from [212.159.90.113] (helo=Hugh) by pih-relay05.plus.net with smtp (Exim) id 1FvbaH-0004QD-3i for rsgb_lf_group@blacksheep.org; Wed, 28 Jun 2006 16:04:05 +0100 Message-ID: <000701c69ac4$183c2460$1f03210a@Hugh> From: "Hugh_m0wye" To: References: <8840D182F8BB7540B173D2B1FA0CA9AB0708E197@argos.clb.tcfr.thales> Date: Wed, 28 Jun 2006 16:03:53 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: Off topic on this list :o) Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit 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=none 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 Status: O X-Status: X-Keywords: X-UID: 5101 Jean-Louis is right, Is seems that even Heinrich Hertz's original experiment demonstrating the existance of radio waves in 1887 was probably achieved at VHF frequencies - judging by the dimensions of the TX Antenna and RX loop with the spark-gap in it. http://en.wikipedia.org/wiki/Image:Hertz_schematic0.PNG 73 Hugh M0WYE ----- Original Message ----- From: To: Sent: Wednesday, June 28, 2006 3:35 PM Subject: LF: Off topic on this list :o) > Hi all > > For your information, spark gaps were not only used for LF in the past > ... > > Jagadis Chandra Bose was experimenting on 60 GHz with spark gaps around > 1897. > > See: > http://www.tuc.nrao.edu/~demerson/bose/bose.html > > > 73 de Jean-Louis F6AGR >