Return-Path: X-Spam-DCC: paranoid 104; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tAEJBAu7002014 for ; Sat, 14 Nov 2015 20:11:10 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZxgAh-0006Oo-3d for rs_out_1@blacksheep.org; Sat, 14 Nov 2015 19:07:35 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZxgAg-0006Of-Rj for rsgb_lf_group@blacksheep.org; Sat, 14 Nov 2015 19:07:34 +0000 Received: from smarthost01a.mail.zen.net.uk ([212.23.1.1]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1Zxg9n-0006F6-L3 for rsgb_lf_group@blacksheep.org; Sat, 14 Nov 2015 19:07:33 +0000 Received: from [82.70.254.222] (helo=OfficeWin7.lan) by smarthost01a.mail.zen.net.uk with esmtp (Exim 4.80) (envelope-from ) id 1Zxg9a-0002hz-NT for rsgb_lf_group@blacksheep.org; Sat, 14 Nov 2015 19:06:26 +0000 Date: Sat, 14 Nov 2015 19:06:26 +0000 From: Chris Wilson Organization: Gatesgarth Developments X-Priority: 3 (Normal) Message-ID: <4510637253.20151114190626@chriswilson.tv> To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Originating-smarthost01a-IP: [82.70.254.222] X-Scan-Signature: 87966b345956c8ef3389b993f6a18f4e Subject: LF: Valve LF amps and tank coil size / voltage rating? Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5069 14 November 2015 If you built a decent power valve LF amp what is the realistic voltage limit to ferrite cored tank circuits? In other words, what plate voltage / current is the limit for say a ferrite cored toroidal coil before you have to move on to an air cored (very large?) tank coil? Anyone have any links to the limiting figures? All the highish power valved LF amps I can find are commercial and size was probably not an issue, but MAYBE they were pre ferrite toroids, I am not sure when they came into usage. Thanks. -- Best regards, Chris 2E0ILY mailto:chris@chriswilson.tv