Return-Path: Received: (qmail 28907 invoked from network); 11 Nov 2002 22:45:04 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 11 Nov 2002 22:45:04 -0000 Received: (qmail 11567 invoked from network); 11 Nov 2002 22:44:37 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 11 Nov 2002 22:44:37 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18BNFx-0007Rd-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 11 Nov 2002 22:42:09 +0000 Received: from [216.93.66.203] (helo=mail4.mx.voyager.net) by post.thorcom.com with esmtp (Exim 4.10) id 18BNFw-0007RU-00 for rsgb_lf_group@blacksheep.org; Mon, 11 Nov 2002 22:42:08 +0000 Received: from k6500 (d147.as1.mpls0.mn.voyager.net [169.207.171.53]) by mail4.mx.voyager.net (8.11.6/8.10.2) with SMTP id gABMg7F68723 for ; Mon, 11 Nov 2002 17:42:07 -0500 (EST) From: "WE0H" To: rsgb_lf_group@blacksheep.org Date: Mon, 11 Nov 2002 16:43:02 -0600 Message-ID: MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-reply-to: <5.1.0.14.0.20021111102152.00a924d8@gemini.herts.ac.uk> Subject: RE: LF: Question on building homebrew variable caps... Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.2 required=5.0tests=DEAR_SOMEBODY,IN_REP_TO,SPAM_PHRASE_01_02, USER_AGENT_OUTLOOKversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group 166.5kc. Bill Ashlock told me that the variable cap is a small part of the total capacitance so there will be only a bit over 1/2a in the variable cap. I do need to have a voltage rating of 2.5kv. This is for a 400w transmitter and a big transmit loop for a Part-5 experimental station. Mike>WE0H http://www.we0h.us/lf.html -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of James Moritz Sent: Monday, November 11, 2002 4:31 AM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Question on building homebrew variable caps... At 21:28 10/11/2002 -0600, you wrote: >I would like to know if anyone has built variable capacitors for >transmitters or tuners. I would like to build a variable capacitor that is >at least 100pf and can handle 40 amps of RF current. Does anyone have any >ideas or links to some articles??? >Thanks es 73's, >Mike>WE0H >http://www.we0h.us/lf.html Dear Mike, LF group, What frequency is it for? Surely not LF - at 185kHz, the voltage rating might be a problem - about 340kV with 40A! Cheers, Jim Moritz 73 de M0BMU _____________________________________________________ This message scanned for viruses by CoreComm