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[195.171.43.25]) by mx.google.com with ESMTP id n7si17881507eey.117.2013.07.20.06.59.16 for ; Sat, 20 Jul 2013 06:59:17 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1V0XeP-0005vl-J5 for rs_out_1@blacksheep.org; Sat, 20 Jul 2013 14:56:45 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1V0XeO-0005vc-Q6 for rsgb_lf_group@blacksheep.org; Sat, 20 Jul 2013 14:56:44 +0100 Received: from smtp-out06.email.it ([212.97.34.22]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1V0XeM-0007DW-Ew for rsgb_lf_group@blacksheep.org; Sat, 20 Jul 2013 14:56:43 +0100 Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp-out06.email.it (Postfix) with ESMTP id D04392C018 for ; Sat, 20 Jul 2013 15:56:40 +0200 (CEST) Received: from smtp-out06.email.it ([127.0.0.1]) by localhost (smtp-out06.email.it [127.0.0.1]) (amavisd-new, port 10024) with LMTP id S0E+wulYP-eK for ; Sat, 20 Jul 2013 15:56:40 +0200 (CEST) Received: from zv5000.localnet (unknown [109.54.14.9]) by smtp-out06.email.it (Postfix) with ESMTP id BED9A2C00F for ; Sat, 20 Jul 2013 15:56:38 +0200 (CEST) From: Claudio Pozzi To: rsgb_lf_group@blacksheep.org Date: Sat, 20 Jul 2013 15:56:24 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.32-5-686; KDE/4.4.5; i686; ; ) References: <51EA8793.1020507@freenet.de> In-Reply-To: <51EA8793.1020507@freenet.de> MIME-Version: 1.0 Message-Id: <201307201556.25063.smtp01@email.it> X-Spam-Score: -0.1 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: On Saturday 20 July 2013 14:50:27 you wrote: > Greetings all, > Does anyone have old databooks of Siemens (now Epcos) ferrite materials > at hand ? > I'm looking for information of N28 material, after discovering a bunch > of pot cores in the junkbox. > 25 mm diameter, 16 mm height, and an AL value of approx. 1 uH per turn > squared. > The label carries the 'Siemens and Halske' logo, so these cores must be > quite old. > > The plan is to use one of them as transformer to feed the gate of a > MOSFET which requires floating ground (source not connected to GND, but > to the drain of another MOSFET). > > Is this old N28 material usable at a few hundred kHz, and what about the > max flux in the core / max density / saturation ? > > Best regards, > Wolf DL4YHF . [...] Content analysis details: (-0.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.97.34.22 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (smtp01[at]email.it) -0.0 SPF_PASS SPF: sender matches SPF record -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (smtp01[at]email.it) X-Scan-Signature: 4e3b1488273adbbe9757d6bdd5adf219 Subject: Re: LF: N28 ferrite material useable on MF ? Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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 Status: O X-Status: X-Keywords: X-UID: 2450 On Saturday 20 July 2013 14:50:27 you wrote: > Greetings all, > Does anyone have old databooks of Siemens (now Epcos) ferrite materials > at hand ? > I'm looking for information of N28 material, after discovering a bunch > of pot cores in the junkbox. > 25 mm diameter, 16 mm height, and an AL value of approx. 1 uH per turn > squared. > The label carries the 'Siemens and Halske' logo, so these cores must be > quite old. > > The plan is to use one of them as transformer to feed the gate of a > MOSFET which requires floating ground (source not connected to GND, but > to the drain of another MOSFET). > > Is this old N28 material usable at a few hundred kHz, and what about the > max flux in the core / max density / saturation ? > > Best regards, > Wolf DL4YHF . I have a Siemens data book with all data but the pot cores are 26x16 mm. If you confirm the diameter 26 I take some pictures an send you. 73 de Claudio IK2PII -- Caselle da 1GB, trasmetti allegati fino a 3GB e in piu' IMAP, POP3 e SMTP autenticato? GRATIS solo con Email.it http://www.email.it/f Sponsor: ANGRY BIRDS: Acquista Peluche e Gadget Originali su mistercupido.com Clicca qui: http://adv.email.it/cgi-bin/foclick.cgi?mid=12900&d=20-7