Return-Path: Received: (qmail 11749 invoked from network); 6 Apr 2003 08:45:38 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 6 Apr 2003 08:45:38 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 6428 invoked from network); 6 Apr 2003 08:45:40 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 6 Apr 2003 08:45:40 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1925kL-0005At-79 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 06 Apr 2003 09:43:25 +0100 Received: from [212.35.226.183] (helo=k2.pncl.co.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1925kG-0005Ak-8Z for rsgb_lf_group@blacksheep.org; Sun, 06 Apr 2003 09:43:20 +0100 Received: from k7t.pncl.co.uk (91.235.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.235.91]) by k2.pncl.co.uk (8.12.3/8.12.3/Debian-5) with ESMTP id h368hIhH019035 for ; Sun, 6 Apr 2003 09:43:19 +0100 Message-ID: <5.1.0.14.2.20030406093827.009ffcb0@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Sun, 06 Apr 2003 09:42:01 +0100 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" In-reply-to: <191xgH-175wvYC@fwd10.sul.t-online.com> References: <5.1.0.14.2.20030404222503.009f79d0@mail.pncl.co.uk> MIME-Version: 1.0 Subject: Re: LF: TX coil screening Content-Type: multipart/mixed; boundary="------------060306020303040602070204" X-Spam-Status: No, hits=-9.9 required=5.0tests=IN_REP_TO,REFERENCESversion=2.51 X-Spam-Checker-Version: SpamAssassin 2.51 (1.174.2.5-2003-03-20-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false This is a multi-part message in MIME format. --------------060306020303040602070204 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hi Uwe, The clearance between the Decca coils and the screening was at least 2.5x coil dia and the calculated loss assuming perfect continuity between copper sheets was less than 0.1 dB. The trick is "perfect" continuity - all soldered edges, no screws. Aluminium would not be good because of this requirement, in spite of what Mr Terman says. It always oxidises eventually. Walter G3JKV. --------------060306020303040602070204 Content-Type: text/plain; charset=windows-1252; name="ATT11757.txt" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="ATT11757.txt" --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/03 --------------060306020303040602070204--