Return-Path: Received: (qmail 5650 invoked from network); 5 Dec 2000 15:13:41 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 5 Dec 2000 15:13:41 -0000 Received: (qmail 12082 invoked from network); 5 Dec 2000 15:16:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 5 Dec 2000 15:16:23 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 143JiV-0007ly-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 05 Dec 2000 15:09:15 +0000 Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 143JiT-0007lt-00 for rsgb_lf_group@blacksheep.org; Tue, 05 Dec 2000 15:09:13 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id QAA1196612 for ; Tue, 5 Dec 2000 16:09:08 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20001205170114.21af53c8@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Tue, 05 Dec 2000 17:01:14 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: keep cool In-reply-to: <000201c05d07$98dc42e0$7417883e@default> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Mal, Thanks for your tips to prevent the loadingcoil from overheating, this will be usefull for those who can get 10A or more into the antenna. Just one remark : >Dont waste all those hundreds of watts heating up your coil, send it up the >antenna. Cooling the coil will not get a mA more into the antenna. The power loss in the coil remains unchanged, it will just warm the water (advantage : tea is ready after each QRSS QSO) instead of the copper. So cooling is OK to prevent destruction of the coil but will not give you any more ERP. PS : maybe if you take into account that copper at 100°C has a higher resistance than copper at 20°C you might gain a few micro-Watts.