Return-Path: X-Spam-DCC: paranoid 1290; 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=-1.3 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,NO_REAL_NAME 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 t93FuRw6007342 for ; Sat, 3 Oct 2015 17:56:27 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZiP6p-0002ZO-VS for rs_out_1@blacksheep.org; Sat, 03 Oct 2015 16:52:27 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZiP6p-0002ZF-HG for rsgb_lf_group@blacksheep.org; Sat, 03 Oct 2015 16:52:27 +0100 Received: from mbox1.netikka.net ([213.250.81.202]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1ZiP5t-0001OE-4z for rsgb_lf_group@blacksheep.org; Sat, 03 Oct 2015 16:52:26 +0100 Received: from localhost (unknown [172.16.83.115]) by mbox1-feedback.netikka.net (Postfix) with ESMTP id 3CF3A128430 for ; Sat, 3 Oct 2015 18:51:12 +0300 (EEST) X-Virus-Scanned: Anvianet Email Filtering Service Received: from hupu.netikka.net ([172.16.83.118]) by localhost (filter1.netikkabb.fi [172.16.83.115]) (amavisd-new, port 10034) with ESMTP id to1gFcLbbst6 for ; Sat, 3 Oct 2015 18:51:11 +0300 (EEST) Received: from posti1.anvianet.fi (postilb2.anvianet.fi [81.209.15.140]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by hupu.netikka.net (Postfix) with ESMTPS id 9E5CD4B004F for ; Sat, 3 Oct 2015 18:51:11 +0300 (EEST) Received: from www-data by posti1.anvianet.fi with local (Exim 4.80) (envelope-from ) id 1ZiP5b-0007Q7-4M for rsgb_lf_group@blacksheep.org; Sat, 03 Oct 2015 18:51:11 +0300 Received: from b623.ip13.netikka.fi (b623.ip13.netikka.fi [94.22.58.111]) by posti.anvianet.fi (Horde Framework) with HTTP; Sat, 03 Oct 2015 15:51:11 +0000 Date: Sat, 03 Oct 2015 15:51:11 +0000 Message-ID: <20151003155111.Horde.-ywuXu7dQf4uLZyTRd1z2g4@posti.anvianet.fi> From: phl@netikka.fi To: rsgb_lf_group@blacksheep.org References: <641522154.20151002112009@chriswilson.tv> <560E69C2.5090902@lineone.net> <788808823.20151003135822@chriswilson.tv> In-Reply-To: <788808823.20151003135822@chriswilson.tv> User-Agent: Internet Messaging Program (IMP) H5 (6.1.7) MIME-Version: 1.0 Content-Disposition: inline X-Scan-Signature: 1708620d3ce65bee0beaaede7929769a Subject: Re: Re[2]: LF: Do mains toroidal transformer cores have any use at LF / MF? Content-Type: text/plain; charset=UTF-8; format=flowed; DelSp=Yes 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: 4254 Hello, 18 V + 18 V = 36 V Just use two transformers with series secondaries to get close to the "magic" 40 V Paul-Henrik, OH1LSQ Quoting Chris Wilson : > Hello Stefan and Hugh, > > > > OK, thanks Stefan and Hugh, I don't think they had anything over > about 18V secondaries. I got my toroidal transformer for my G3YXM > 136kHz amp from www.tme.eu as they were the cheapest i could find > with sensible carriage costs. They have this: > > http://www.tme.eu/en/details/55186-p1s2/toroidal-transformers/talema/# > > > > >> They are not much good above audio frequencies and the turns ratio is >> not convenient either. I should accept them and sell them on to >> enthusiastic builders. I'd quite like, say, a 500VA 40+40V toroidal for >> which I'd happily pay! >> Hugh > > > > > > -- > Best regards, > Chris mailto:chris@chriswilson.tv