Return-Path: Received: from mtain-mb03.r1000.mx.aol.com (mtain-mb03.r1000.mx.aol.com [172.29.96.23]) by air-me07.mail.aol.com (v127_r1.1) with ESMTP id MAILINME074-8bbb4baf7b33263; Sun, 28 Mar 2010 11:52:19 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mb03.r1000.mx.aol.com (Internet Inbound) with ESMTP id A241938000091; Sun, 28 Mar 2010 11:52:17 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NvulN-0002mO-Eq for rs_out_1@blacksheep.org; Sun, 28 Mar 2010 16:50:57 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NvulM-0002mF-WE for rsgb_lf_group@blacksheep.org; Sun, 28 Mar 2010 16:50:57 +0100 Received: from web28105.mail.ukl.yahoo.com ([217.146.182.125]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1NvulM-0008SB-RA for rsgb_lf_group@blacksheep.org; Sun, 28 Mar 2010 16:50:56 +0100 Received: (qmail 16425 invoked by uid 60001); 28 Mar 2010 15:50:50 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1269791450; bh=AMhMsmIKaZ6hv/khteWzCKEhCMJgEM3q9UcjLlZla/s=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=4F7ynYQ2JH3RKWoBdIqx3khfkR1voGYvQ/BnYYGZgzhSCpbKtMlhYtwFCTWlUi8H9hzDyV21SqWoXk7dosCzC5vNpZ+WX3ZydbNaRzZCIAxwI1Vt560A1kSv/8XXaN7BpikYfBEh/M81GoKke2YDJC1ZrRn4U7pKL1GTxrgDQHM= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=SIIig6tX3QmxQT7BLR81TJAbhweL/mCJnP+rwA4e+u4AK3ii9f+U25Zfj5oqEXcA3sORYeEkAOLsjqXRw5n3z4rAygEnvKYzje3BxDrsordGDbKvDtX2AFe27JgsvS4NmMSChkhqrrF/3w9YLZkU+XVlWtIgnLtMBeyJnlz6tmg=; Message-ID: <691251.90580.qm@web28105.mail.ukl.yahoo.com> X-YMail-OSG: mKuJCIsVM1l2BLE4scJZmniO4WThI.WbIYeiGSebjrLHSR0 SFzH1XeMYEJhvdxFCxg2OT47V6BGv.dIbg7zWPARDdXpvf87azcIyUPFHraH IkAneInM6tJMhgeVe3964nKtCnlp_ZQcQIpbXFLrdyx0B.RH7NHDmATQ4.w7 rojg_XSP_aj9BJq6B.ptC.Jxshe1ICt25TlVKwmvzl7juKC_ZRoq..U.scSY w3fPfeL7zoNP2JnMYhdWBW7ePh.jcCCeKjHniRauEBY2BEfwjPKcq Received: from [86.137.246.192] by web28105.mail.ukl.yahoo.com via HTTP; Sun, 28 Mar 2010 08:50:50 PDT X-Mailer: YahooMailClassic/10.0.8 YahooMailWebService/0.8.100.260964 Date: Sun, 28 Mar 2010 08:50:50 -0700 (PDT) From: M0FMT To: rsgb_lf_group@blacksheep.org In-Reply-To: <504674.23276.qm@web86707.mail.ird.yahoo.com> MIME-Version: 1.0 DomainKey-Status: good (testing) Subject: Re: LF: 3C85 cores Content-Type: multipart/alternative; boundary="0-1584982194-1269791450=:90580" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE autolearn=no version=2.63 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-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d303.2 ; domain : yahoo.co.uk DKIM : pass x-aol-sid: 3039ac1d60174baf7b315964 X-AOL-IP: 193.82.116.20 --0-1584982194-1269791450=:90580 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi =A0 That unobtainable Ferrite is similar to the core material in TV Line Outpu= t Transformers (LOPT). I have used these for 136kc/s PA output transformer= . They are big though. They are used in PC CRT monitors as well and these= things are being thrown away nowadays because of the flat screen LCD disp= lays taking over now. I have just compared the inductance I get=A0when I= measure 50 turns on one of these LOPT cores with the calculated value of= a=A0Ferroxcube 3C90 toroid of similar size, so if that is any thing to go= by an old=A0LOPT core could be your answer. =A0 73 es GL petefmt --- On Thu, 11/3/10, Dave Pick wrote: From: Dave Pick Subject: Re: LF: 3C85 cores To: rsgb_lf_group@blacksheep.org Date: Thursday, 11 March, 2010, 18:43 Chaps 3C85 was superseded by 3C90 so you might have better luck finding that. Now Epcos are the suppliers I think their N87 material looks best for 136/= 500k. They do a 38mm toroid but I haven't found a stockist yet. Dave. From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org Sent: Thursday, 11 March, 2010 18:09:01 Subject: Re: LF: 3C85 cores Mike, Farnell stock the 13.25mm diameter version of 3C85 as part number 178504= at 14p each, but I expect these may be too small for yoru application. Di= dn't see any larger onese listed. 73s Roger G3XBM On 11 March 2010 09:39, Michael Probert wrote: Hello LF group, Does anyone know of a source of supply of the 58mm OD cores 3C85 (or the Phillips equivalent )--in small quantities. =A0David G0MRF used to hold = =A0some but tells me he is out of stock. Any help would be greatly appreciated. 73 Mike GW4HXO --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/G3XBM G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088 =20 --0-1584982194-1269791450=:90580 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
=20 --0-1584982194-1269791450=:90580--
Hi
 
That unobtainable Ferrite is similar to the core material in TV Line= Output Transformers (LOPT). I have used these for 136kc/s PA output trans= former. They are big though. They are used in PC CRT monitors as well and= these things are being thrown away nowadays because of the flat screen LC= D displays taking over now. I have just compared the inductance I get = ;when I measure 50 turns on one of these LOPT cores with the calculated va= lue of a Ferroxcube 3C90 toroid of similar size, so if that is any th= ing to go by an old LOPT core could be your answer.
 
73 es GL petefmt

--- On Thu, 11/3/10= , Dave Pick <davepick@btinternet.com> wrote:

From: Dave Pick <davepick@btinternet.com>= ;
Subject: Re: LF: 3C85 cores
To: rsgb_lf_group@blacksheep.org
Da= te: Thursday, 11 March, 2010, 18:43

Chaps

3C85 was superseded by 3C90 so you might have bett= er luck finding that.
Now Epcos are the suppliers I think their N87 mat= erial looks best for 136/500k.
They do a 38mm toroid but I haven't foun= d a stockist yet.

Dave.


From: Roger Lapthorn <r= ogerlapthorn@gmail.com>
To: rsgb_lf_group@blacksheep.org
Sent: Thursday, 11 March, 2010 18:09:01
Subject: Re: LF: 3C85 cores

M= ike,

Farnell stock the 13.25mm diameter version of 3C85 as part num= ber 178504 at 14p each, but I expect these may be too small for yoru appli= cation. Didn't see any larger onese listed.

73s
Roger G3XBM
<= BR>
On 11 March 2010 09:39, Michael Probert <mikegw4hxo@solva.co.uk> wrote:

Hello LF group,=

Does anyone know of a source of supply of the 58mm OD cores 3C85= (or the
Phillips equivalent )--in small quantities.  David G0MRF= used to hold  some
but tells me he is out of stock.

Any he= lp would be greatly appreciated.

73

Mike GW4HXO


<= BR>







--
<= BR>http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://= www.youtube.com/user/G3XBM
G3XBM    GQRP 1678   &nbs= p;  ISWL G11088