Return-Path: Received: from rly-md04.mx.aol.com (rly-md04.mail.aol.com [172.20.29.142]) by air-md07.mail.aol.com (v124.15) with ESMTP id MAILINMD073-8fc4a6c446221f; Sun, 26 Jul 2009 07:56:28 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md04.mx.aol.com (v124.15) with ESMTP id MAILRELAYINMD044-8fc4a6c446221f; Sun, 26 Jul 2009 07:56:22 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MV2Jg-0004aL-Ar for rs_out_1@blacksheep.org; Sun, 26 Jul 2009 12:55:00 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MV2Jf-0004aA-Mr for rsgb_lf_group@blacksheep.org; Sun, 26 Jul 2009 12:54:59 +0100 Received: from blu0-omc1-s28.blu0.hotmail.com ([65.55.116.39]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MV2JJ-0001Ze-PB for rsgb_lf_group@blacksheep.org; Sun, 26 Jul 2009 12:54:39 +0100 Received: from BLU146-W25 ([65.55.116.7]) by blu0-omc1-s28.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sun, 26 Jul 2009 04:54:49 -0700 Message-ID: X-Originating-IP: [117.12.238.242] From: Laurence BY3A-KL1X China To: Date: Sun, 26 Jul 2009 03:54:49 -0800 Importance: Normal MIME-Version: 1.0 X-OriginalArrivalTime: 26 Jul 2009 11:54:49.0347 (UTC) FILETIME=[E0CABD30:01CA0DE7] X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary="_0101a2f8-d81e-4f39-8395-295612d773d1_" Subject: LF: gw3uep 100w qtx X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=FORGED_HOTMAIL_RCVD, 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-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --_0101a2f8-d81e-4f39-8395-295612d773d1_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable =20 I was whistling with some time to spare in 9V and built the 25W version th= en did a messy retro to convert it to the 100W version using the single IR= F640. =20 With 24V applied the dummy load (2 x 10W 100 ohm wire wound in parallel-= all that was available to me) gets smoking hot within a min which is eith= er a good sign if you like RF but not good if your a resistor....no compos= ites or more RF friendly available. =20 http://uk500khz.googlegroups.com/web/MFCW100WPA_220709.gif =20 Wonder if anyone can tell me if theyve noticed any heating of L2 and to a= lesser extent L3. Nothing hot just warm so some losses. This maybe due to= the load but perhaps not. =20 Has anyone had to add a sink on TR2 the pass device due to higher temps at= 5A ? =20 The IRF device is Cold at full output (and I do mean Cold) which is a very= good sign. All caps are cold (I paralled Polys to get to the right figure= ) =20 Im without test equipment here in China with just a multimeter but it appe= ars all is well...so hence the questions. =20 All readings are as Roger et al described... with thanks =20 Laurence KL1X in BY3a =20 =20 _________________________________________________________________ Windows Live=99 Hotmail=AE: Celebrate the moment with your favorite sports= pics. Check it out. http://www.windowslive.com/Online/Hotmail/Campaign/QuickAdd?ocid=3DTXT_TAG= LM_WL_QA_HM_sports_photos_072009&cat=3Dsports=3D --_0101a2f8-d81e-4f39-8395-295612d773d1_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

I was whistling with some time to spare in 9V and built the 25W versio= n then did a messy retro to convert it to the 100W version using the= single IRF640.

With 24V applied the dummy load (2 x 10W 100 ohm wire wound in= parallel- all that was available to me) gets smoking hot within a min whi= ch is either a good sign if you like RF but not good if your a resistor...= .no composites or more RF friendly available.

htt= p://uk500khz.googlegroups.com/web/MFCW100WPA_220709.gif

Wonder if anyone can tell me if theyve noticed any heating of L2 and to a= lesser extent L3. Nothing hot just warm so some losses. This maybe due to= the load but perhaps not.

Has anyone had to add a sink on TR2 the pass device due to higher temps at= 5A ?

The IRF device is Cold at full output (and I do mean Cold) which is a very= good sign. All caps are cold (I paralled Polys to get to the right figure= )

Im without test equipment here in China with just a multimeter but it appe= ars all is well...so hence the questions.

All readings are as Roger et al described... with thanks

Laurence KL1X in BY3a

Windows Live=99 Hotmail=AE: Celebrate the moment wit= h your favorite sports pics. Check it out. =3D --_0101a2f8-d81e-4f39-8395-295612d773d1_--