Return-Path: Received: (qmail 15970 invoked from network); 30 Mar 2002 19:24:47 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by exhibition.plus.net with SMTP; 30 Mar 2002 19:24:47 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 2066 invoked from network); 30 Mar 2002 19:24:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 30 Mar 2002 19:24:33 -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 16rPvu-0004Yn-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 30 Mar 2002 20:58:42 +0000 Received: from mail4.messagelabs.com ([212.125.75.12]) by post.thorcom.com with smtp (Exim 3.33 #2) id 16rPvt-0004Yi-00 for rsgb_lf_group@blacksheep.org; Sat, 30 Mar 2002 20:58:41 +0000 X-VirusChecked: Checked Received: (qmail 17661 invoked from network); 30 Mar 2002 19:20:37 -0000 Received: from merimac.us.gases.boc.com (HELO merimac) (204.149.80.4) by server-11.tower-4.messagelabs.com with SMTP; 30 Mar 2002 19:20:37 -0000 Received: by EXC_WIL04 with Internet Mail Service (5.5.2653.19) id ; Sat, 30 Mar 2002 14:28:10 -0500 Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re: RE: loops Date: Sat, 30 Mar 2002 14:11:34 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Dave, Many thanks for the comeback with you loop parameters. Have a few questions about these: >Loop conductor is two runs in parallel of 7/1.5mm aluminium-- your bog >standard 11 kV overhead drop-lead stuff. I assume this is two strips of 7mm x 1.5mm Al? The two are running in parallel, but assume they are they also connected in parallel at their ends rather than in series? >and effective resistance at 180kHz of 0.99 ohms - a bit on the high side, I suppose the skin effect losses are pretty high with a 1.5mm thickness since this is about 10 times the skin depth. This is what makes larger diam solid or stranded conductors not worth much (unless Litzed.) What are the dimensions of your loop and how high is the lower portion above ground? Bill A ********************************************************************* This footnote confirms that this e-mail message has been scanned for the presence of known computer viruses by the MessageLabs Virus Control Centre. However, it is still recommended that you use local virus scanning software to monitor for the presence of viruses. *********************************************************************