Return-Path: Received: from mtain-md11.r1000.mx.aol.com (mtain-md11.r1000.mx.aol.com [172.29.96.95]) by air-ma08.mail.aol.com (v129.4) with ESMTP id MAILINMA084-b5334c642c463c3; Thu, 12 Aug 2010 13:15:50 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-md11.r1000.mx.aol.com (Internet Inbound) with ESMTP id 03EC638000108; Thu, 12 Aug 2010 13:15:46 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OjbMn-0000Up-Ke for rs_out_1@blacksheep.org; Thu, 12 Aug 2010 18:14:57 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OjbMn-0000Uf-5K for rsgb_lf_group@blacksheep.org; Thu, 12 Aug 2010 18:14:57 +0100 Received: from smtp-vbr6.xs4all.nl ([194.109.24.26]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OjbMm-0002X3-4R for rsgb_lf_group@blacksheep.org; Thu, 12 Aug 2010 18:14:57 +0100 Received: from PCvanAlbert (a80-101-33-132.adsl.xs4all.nl [80.101.33.132]) by smtp-vbr6.xs4all.nl (8.13.8/8.13.8) with SMTP id o7CHEogc072648 for ; Thu, 12 Aug 2010 19:14:55 +0200 (CEST) (envelope-from westberg@xs4all.nl) Message-ID: From: "Albert" To: References: , In-Reply-To: Date: Thu, 12 Aug 2010 19:14:49 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18197 X-Virus-Scanned: by XS4ALL Virus Scanner X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: T200-2 toroid cores Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01CB3A52.A29D05C0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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-sid: 3039ac1d605f4c642c427043 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_000E_01CB3A52.A29D05C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Rik, I am using T225-2B's in the LPF for my portable 500 kHz TX. @ 500W out= put they stay cool. 73, Albert PA0A See: http://partsandkits.com/toroids.php ----- Original Message -----=20 From: Rik Strobbe=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, August 12, 2010 5:33 PM Subject: RE: LF: T200-2 toroid cores Warren, thanks for the hint. I just had a look and Jay actually uses T225A-2 toroids. The "A" mea= ns almost double height (and thus almost double cross sectional area). But Jay states that "Both filters have been tested to power levels= in excess of 1000 watts and should be capable of handling significant= ly more power.". So I assume that the T200-2 toroids will be OK for the 400-500W powe= r level I have in mind. 73, Rik ON7YD - OR7T ----------------------------------------------------------------------= -------- Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksh= eep.org] namens Warren Ziegler [wd2xgj@gmail.com] Verzonden: donderdag 12 augustus 2010 16:56 Aan: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: T200-2 toroid cores Rik, See Jay's web page, he uses T225-2 cores at the kW level for LPF: http://www.w1vd.com/LPF.html --=20 73 Warren K2ORS WD2XGJ=20 WD2XSH/23 WE2XEB/2 WE2XGR/1 On Thu, Aug 12, 2010 at 9:27 AM, Rik Strobbe wrote: Dear all, does anyone have experience with T200-2 cores (amidon) for 500kHz= lowpass filters ? Up to what power are they suitable ? 73, Rik ON7YD - OR7T =20 ------=_NextPart_000_000E_01CB3A52.A29D05C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hello Rik,
 
I am using T225-2B's in the LPF for= my portable 500=20 kHz TX. @ 500W output they stay cool.
 
73, Albert PA0A
 
See: http://partsandkits.com/toroids.php<= /DIV>
 
 
----- Original Message -----
From:=20 Rik Strobbe
Sent: Thursday, August 12, 20= 10 5:33=20 PM
Subject: RE: LF: T200-2 toroi= d=20 cores

Warren,
 
thanks for the hint.
I just had a look and Jay actually= uses T225A-2=20 toroids. The "A" means almost double height (and thus almost double= cross=20 sectional area).
But Jay states that "Both=20 filters have been tested to power levels in excess of 1000 watts and= should be=20 capable of handling significantly more power.".
So I assume that the T200-2 toroids= will=20 be OK for the 400-500W power level I have in mind.<= /DIV>
 
73, Rik  ON7YD - OR7T
&= nbsp;
Van:=20 owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.o= rg] namens=20 Warren Ziegler [wd2xgj@gmail.com]
Verzonden: donderdag 12= augustus=20 2010 16:56
Aan: rsgb_lf_group@blacksheep.org
Onderwe= rp:=20 Re: LF: T200-2 toroid cores

Rik,

  See Jay's web page, he uses T225-2 cores at= the kW=20 level for LPF:
http://www.w1vd.com/LPF.html

--
73 Warren=20 K2ORS
                WD2= XGJ=20
               =20 WD2XSH/23
               = =20 WE2XEB/2
               = =20 WE2XGR/1


On Thu, Aug 12, 2010 at 9:27 AM, Rik Strobb= e <Rik.Strobbe@fys.kuleuven.be>=20 wrote:
De= ar all,

does anyone have experience with T200-2=20 cores (amidon) for 500kHz lowpass filters ?
Up to what power ar= e they=20 suitable ?

73, Rik  ON7YD - OR7T




 
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