Return-Path: <owner-rsgb_lf_group@blacksheep.org> Received: (qmail 71177 invoked from network); 9 Jul 2004 21:41:53 -0000 Received: from unknown (HELO ptb-spamcore01.plus.net) (192.168.71.1) by ptb-mailstore01.plus.net with SMTP; 9 Jul 2004 21:41:53 -0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore01.plus.net with esmtp (Exim 4.32; FreeBSD) id 1Bj38Q-000E7C-Kx for dave@picks.force9.co.uk; Fri, 09 Jul 2004 22:42:22 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1Bj37v-000N78-3e for dave@picks.force9.co.uk; Fri, 09 Jul 2004 21:41:51 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Bj36m-0007zg-Nv for rs_out_1@blacksheep.org; Fri, 09 Jul 2004 22:40:40 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Bj36m-0007zV-9H for rsgb_lf_group@blacksheep.org; Fri, 09 Jul 2004 22:40:40 +0100 Received: from smarthost1.mail.uk.easynet.net ([212.135.6.11]) by relay.salmark.net with esmtp (Exim 4.24) id 1Bj36H-0006gl-Cp for rsgb_lf_group@blacksheep.org; Fri, 09 Jul 2004 22:40:09 +0100 Received: from tnt-5-4.easynet.co.uk ([195.40.200.4] helo=erica) by smarthost1.mail.uk.easynet.net with smtp (Exim 4.10) id 1Bj36i-0000zt-00 for rsgb_lf_group@blacksheep.org; Fri, 09 Jul 2004 22:40:37 +0100 Message-ID: <001d01c46600$5da5da00$04c828c3@erica> From: "g3ldo" <g3ldo@ukonline.co.uk> To: rsgb_lf_group@blacksheep.org References: <006c01c45ed2$5cd7b4c0$6401a8c0@G3PHO> <000201c46518$2c798b40$108cf8d4@actalbot> Date: Fri, 9 Jul 2004 23:01:08 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Re: Tin Plating compound (off topic LF, almost on topic microwaves) Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com 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 X-spamcore-flag: yes X-Spam-Filtered: by PlusNet SpamCORE (v3.00) Andy said >What would we do without all this wonderful H & S legislation! I used to use some stuff called Amonium Bi-flouride in 1960. I used it to etch crystals for SSB filters etc. You could buy it from any chemist (although they didn't normally stock it). You made a solution of it in a plastic container and just dropped the crystal in and washed and checked the crystal frequency at frequent periods to make sure you didn't overshoot. The plastic container was kept on the shack windowsill and the fumes from it caused the lower pane of the window to frost over! Nevertheless, I found the most dangerious item around a shack is a high voltage power supply (and the high voltage at the top of an LF loading coil), and it is impossible to apply H & S legislation to that. Peter, G3LDO