Return-Path: Received: (qmail 15097 invoked from network); 31 Jan 2001 16:23:45 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 31 Jan 2001 16:23:45 -0000 Received: (qmail 24876 invoked from network); 31 Jan 2001 16:27:21 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 31 Jan 2001 16:27:21 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14NzzU-0005Pl-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 31 Jan 2001 16:20:16 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14NzzQ-0005Pg-00 for rsgb_lf_group@blacksheep.org; Wed, 31 Jan 2001 16:20:12 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id QAA23411; Wed, 31 Jan 2001 16:21:37 GMT Received: (qmail 7842 invoked from network); 31 Jan 2001 17:13:16 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 31 Jan 2001 17:13:16 -0000 Received: by gauntlet.mail.dera.gov.uk; id RAA29207; Wed, 31 Jan 2001 17:04:01 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma029138; Wed, 31 Jan 01 17:03:31 GMT Received: from FRN-MAIL-3.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Wed, 31 Jan 2001 16:23:08 +0000 Received: by frn-mail-3.dera.gov.uk with Internet Mail Service (5.5.2650.21) id <1ATSMNWF>; Wed, 31 Jan 2001 16:19:26 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7586@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: 3C85 Material: Obsolete Date: Wed, 31 Jan 2001 16:19:41 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Well, you can but try! If it gets too hot it is useless. Don't forget the vital formula relating minimum number of Turns N, Core cross sectional area A (m^2) RMS Voltage V, and Saturation flux density B (use 0.15 to 0.2 Tesla for most ferrites) : V = 4.44.F.N.A.B You would probably do better using surplus SMPSU components than old TV cores. 'JNT > -----Original Message----- > From: Alberto di Bene [mailto:dibene@usa.net] > Sent: 2001-01-31 15:40 > To: rsgb_lf_group@blacksheep.org > Subject: LF: RE: 3C85 Material: Obsolete? > > > > One promising looking core for the kiloWatt region is the ETD54 and > > ETD59 sizes in 3C90 available from Farnell. and are > specified for use > > up to 200kHz. > > > > What about EHT transformer cores salvaged from old TV sets ? > Any experiences with them ? > > 73 Alberto I2PHD > > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.