X-GM-THRID: 1207405171312521552 X-Gmail-Labels: rsgb lf X-Gmail-Received: 50b62e1bbfdbd59e411482d7dd7f540ba0f843c0 Delivered-To: daveyxm@gmail.com Received: by 10.64.249.17 with SMTP id w17cs251507qbh; Wed, 28 Jun 2006 17:04:27 -0700 (PDT) Received: by 10.48.233.18 with SMTP id f18mr1141205nfh; Wed, 28 Jun 2006 17:04:27 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id y23si3400959nfb.2006.06.28.17.04.27; Wed, 28 Jun 2006 17:04:27 -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 1Fvjz9-0006KM-5s for rs_out_1@blacksheep.org; Thu, 29 Jun 2006 01:02:19 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Fvjz8-0006KD-P1 for rsgb_lf_group@blacksheep.org; Thu, 29 Jun 2006 01:02:18 +0100 Received: from fish4.hurontel.on.ca ([216.46.140.6]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1Fvjz3-0000Sl-Sa for rsgb_lf_group@blacksheep.org; Thu, 29 Jun 2006 01:02:18 +0100 Received: from server (unknown [10.105.128.241]) by fish4.hurontel.on.ca (Spam Firewall) with SMTP id 1A92CEC1D7 for ; Wed, 28 Jun 2006 20:02:01 -0400 (EDT) Message-ID: <00d501c69b03$7623c260$0b01a8c0@server> From: "J. B. Weazle McCreath" To: References: <200606280505.k5S55B38054415@dslgw1.aebc.com> <44A3145C.9020702@ukonline.co.uk> Date: Wed, 28 Jun 2006 23:37:35 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Virus-Scanned: by Barracuda Spam Firewall at hurontel.on.ca X-Spam-Score: -0.3 (/) X-Spam-Report: autolearn=disabled,AWL=-1.158,PLING_QUERY=0.857 Subject: Re: LF: LF/HF/VHF Spark?! Content-Type: text/plain; charset="iso-8859-1" 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=0.2 required=5.0 tests=PLING_QUERY 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: 5235 Hello LFers, My other hobby is experimenting with Tesla coils and I have three at the moment that are operational. The largest is powered by a hydro "pole pig" transformer and I run it at a modest 3 KVA input power. It produces multiple discharges of over 1 meter in length and it can light up a fluorescent tube held in your hand 15 feet from the coil. I was concerned about possible nasty effects on my LF receiving kit, so I did a few test. Like Peter, G3LDO, mentioned in his posting, I was rather surprised at how little it radiated. The coil runs roughly at 100 kHz. and I had anticipated a rather broad spectrum of noise up thru the LF bands. I saw nothing on my Argo screen to indicate that the coil was disrupting LF reception at various QRSS speeds. The distance from my antennas to the shop where the coil resides is about fifty feet. It appears that a Tesla coil WITHOUT an antenna attached to it is a poor radiator of RF energy. Hum...I wonder if you G stations could copy it if I connected my T antenna up some night? 73, J.B., VE3EAR - VE3WZL Solar and wind powered EN93dr