Return-Path: Received: (qmail 29828 invoked from network); 31 Jan 2000 10:31:41 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by dimple.core.plus.net.uk with SMTP; 31 Jan 2000 10:31:41 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12FDtc-00018n-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 31 Jan 2000 10:17:24 +0000 Received: from mserv1a.u-net.net ([195.102.240.34]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12FDta-00018i-00 for rsgb_lf_group@blacksheep.org; Mon, 31 Jan 2000 10:17:23 +0000 Received: from rsgb.u-net.com ([195.102.80.225] helo=rsgb.org.uk) by mserv1a.u-net.net with esmtp (Exim 2.10 #63) id 12FDtt-00068k-00 for rsgb_lf_group@blacksheep.org; Mon, 31 Jan 2000 10:17:42 +0000 Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.0.R) for ; Mon, 31 Jan 2000 09:59:51 +0000 X-Priority: 3 X-MSMail-Priority: Normal From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 31 Jan 2000 09:59:49 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: 8 kHz loading coil In-reply-to: <000d01bf6a31$3bf336c0$975b97d4@win95.swipnet.se> X-Mailer: Pegasus Mail for Win32 (v3.11) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail.rsgbhq Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > I have an idea of resonating my existing vertical on 8 kHz. > Is there a practical way to construct a 600 mH loading coil, withstanding > 3-4 A and high voltage? Any *large* toroids on the market?' > /Christer > sm6pxj Are we locked into HF thinking here? Why not use an iron cored inductor such as the output transformer from a QRO valve audio amplifier? Mike, G3XDV (IO91VT) http://www.dennison.demon.co.uk/activity.htm