Return-Path: Received: from mtain-df05.r1000.mx.aol.com (mtain-df05.r1000.mx.aol.com [172.29.64.217]) by air-dc10.mail.aol.com (v129.4) with ESMTP id MAILINDC104-86a84c4d8997c5; Mon, 26 Jul 2010 09:11:51 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-df05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 31F7A38000084; Mon, 26 Jul 2010 09:11:49 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OdNSB-000437-0u for rs_out_1@blacksheep.org; Mon, 26 Jul 2010 14:10:47 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OdNSA-00042y-BP for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 2010 14:10:46 +0100 Received: from web86706.mail.ird.yahoo.com ([217.146.188.147]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1OdNS9-0003Vc-40 for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 2010 14:10:46 +0100 Received: (qmail 49962 invoked by uid 60001); 26 Jul 2010 13:10:38 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=s1024; t=1280149838; bh=kLczcICootcvTCmyZVOLWYMZxri0TpTtRylWT8uifYs=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=56kaXqU6HiIH5itNUjpMGZ5712zchxXBob2zGdRfXRisXoAoI+KA3B2WO7fELfdbrB/G8mQB5OU5N2m+K6QqcmF4TmfsUVfOdbRVtdDcgKz/iH0bQCo4gBI7eNAKc3zb/cWNQe+Y7/+sCLNWBq/IYSeCa4kqkdOvWkiSspJqX2w= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=qHZIOz+wa6VEKaQgqmsopAFUpaYs6faJg/9b3KIT5wD1KiNlsAG0N3SEsxv8gKC2BqWot+uceC9H3ZRgtmX8uraeS7fuIuaim5FGpiNN0/xjybp643+ZN4kZfogIXPVP5zT8quKvpYaknLMeWiN850egOHahc08hQRh3JhJCVHQ=; Message-ID: <379486.49929.qm@web86706.mail.ird.yahoo.com> X-YMail-OSG: KEyOuFsVM1l2wzpgwJPNU5gdOcIsH7ppXTgSEeMGRAge7yi zeOUE4CkPQ6DP05z0eJeTg303uZ1ULAC5YqvMI_IBFF8LHUCxvNXTj.DxBqN EWDU98JFFP6K1bmmojEeWPCEZDqQ2eAOj0QVVz3tDDoQgvv5kQPFOTk05MkM jF0oGVOdNs8qXXqwK3ToCAVcEaC00KeOj3qKWL8Zuh1JnB9JSFTAA_iaxfWU 8cYK9u9BWEOaCPcaXtLEWUHOlsekxVsibL1JFVJca2jO0yFbAtYz6mcAJyE. _zaPdD4QLqnlJwoq3jt6DSAjHHvH6CAyR Received: from [86.161.193.147] by web86706.mail.ird.yahoo.com via HTTP; Mon, 26 Jul 2010 06:10:38 PDT X-Mailer: YahooMailRC/420.4 YahooMailWebService/0.8.104.276605 References: <92F6B0CB5F307544B1F54305F95265AB169DF1@API.clb.tcfr.thales> Date: Mon, 26 Jul 2010 06:10:38 -0700 (PDT) From: Dave Pick To: rsgb_lf_group@blacksheep.org In-Reply-To: <92F6B0CB5F307544B1F54305F95265AB169DF1@API.clb.tcfr.thales> MIME-Version: 1.0 DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Noise R75 - rs232 from smpsu - Content-Type: multipart/alternative; boundary="0-1345263444-1280149838=:49929" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_30_40,HTML_FONTCOLOR_BLUE, HTML_FONTCOLOR_UNSAFE,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-d248.1 ; domain : btinternet.com DKIM : pass x-aol-sid: 3039ac1d40d94c4d899542b8 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none --0-1345263444-1280149838=:49929 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Jean-Louis I had a 12V car/aeroplane adaptor for one of my Dells, made by a company= called=20 LL Power inc. Dell used to sell them as accessories. LL Power have a web-site at=20 http://www.llpower.com Remember that these switch-mode adapters will cause RF interference! Dave G3YXM ________________________________ From: "Jean-Louis.RAULT@fr.thalesgroup.com"=20 To: rsgb_lf_group@blacksheep.org Sent: Monday, 26 July, 2010 8:13:05 Subject: RE: LF: Noise R75 - rs232 from smpsu - Dear all, =20 Do you know if there is any 12 V DC power supply supplier for the DELL la= ptops=20 ? =20 Jean-Louis F6AGR ________________________________ From: owner-rsgb_lf_group@blacksheep.org =20 [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Andy Talbot >Sent: Friday, July 23, 2010 11:05 PM >To: rsgb_lf_group@blacksheep.org >Subject: Re: LF: Noise R75 - rs232 from smpsu - > > >Yes, I've played with running laptops including Dells from all sorts of= power=20 >supplies. The nominal voltage can go a goodly 10 - 20% either way bef= ore it=20 >flags an error - and they seem to detect over voltage and take evasive= =20 >action, although couldn't guarantee all do. >=20 >BUT there's a big snag with Dells. If youv'e got one with the three = way=20 >coaxial DC connector (it has a very thin centre pin) - the PSU contains= a =20 >DS2502 one-wire EEPROM.. The Laptop interrogates the PSU to find ou= t if=20 >its satisfactory and if the EEPROM isn't present, the laptop will use= the=20 >external power, but refuse to charge the battery. On a 12V input mo= bile=20 >PSU I had to butcher a surplus Dell black brick to get the EEPROM and= =20 >incorporate it into the connector for the new PSU. >=20 >Those EEPROMS are supposed to be easy enough to read, so when I need one= =20 >again, will read the contents and stick them into a fresh chip. >=20 > >Andy >www.g4jnt.com > > > >On 23 July 2010 21:47, Laurence KL7UK wr= ote: > > >>Anyone done any common mode noise mitigation from the RS232 port of = the R75=20 >>Rx> - the noise coming up from the SMPSU/processor from the old Del= l=20 >>puter - cable is double screened - choking off using J (75) type ha= s seen=20 >>little improvement - this is my last hurdle to unimpeded remote rx = on 137 -=20 >>any pointers appreciated - everythings bonded and Ive tried the on/= off=20 >>earth tricks at various locations -=20 >> >>=20 >>Anyone had any success of powering a Dell D series from a non stand= ard non=20 >>switched PSU? (the noise goes away when the DC from the Black Dell= brick is=20 >>removed but it may also be partially screen/processor noise...) >>=20 >>with thanks >>=20 >>Laurence Kl7UK >>=20 >> >>________________________________ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with= =20 Hotmail. Get busy. > --0-1345263444-1280149838=:49929 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Jean-Louis

I had a 12V car/aeroplane adaptor for one= of my Dells, made by a company called LL Power inc.
Dell used to= sell them as accessories. LL Power have a web-site at http://www.llpower.com
Rem= ember that these switch-mode adapters will cause RF interference!

<= div>Dave G3YXM

From: "Jean-Louis.RAULT@fr.thalesgroup.com" <Jean-Louis.RAULT@fr.thalesgro= up.com>
To: rsgb_lf_group@blacksheep.org
Sen= t: Monday, 26 July, 2010 8:13:05
Subject: RE: LF: Noise R75 - rs232 from smpsu -
<= /font>
=20
Dear all,
 
Do you know if there is any= 12 V DC power supply supplier=20 for the DELL laptops ?
 
Jean-Louis F6AGR

From: owner-rsgb_lf_group@blacks= heep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Andy=20 Talbot
Sent: Friday, July 23, 2010 11:05 PM
To:=20 rsgb_lf_group@blacksheep.org
Subject: Re: LF: Noise R75 - rs23= 2 from=20 smpsu -

Yes, I've played with running laptops including Dells from all sort= s of=20 power supplies.  The nominal voltage can go a goodly 10 - 20%= either=20 way before it flags an error - and they seem to detect over voltage= and=20 take evasive action, although couldn't guarantee all do.
 
BUT there's a big snag with Dells.  If youv'e got one with the= three=20 way coaxial DC connector (it has a very thin centre pin) - the PSU conta= ins a=20 DS2502  one-wire EEPROM..   The Laptop interrogates the= PSU to=20 find out if its satisfactory and if the EEPROM isn't present, the laptop= will=20 use the external power, but refuse to charge the battery.  &nb= sp; On=20 a 12V input mobile PSU I had to butcher a surplus Dell black= =20 brick to get the EEPROM and incorporate it into the connector for= the new=20 PSU.
 
Those EEPROMS are supposed to be easy enough to read, so when I nee= d one=20 again, will read the contents and stick them into a fresh chip.
 
On 23 July 2010 21:47, Laurence KL7UK <hellozerohellozero@hotmail.com>=20 wrote:

Anyone done any common mode noise mitigation from the RS232= port of=20 the R75 Rx> - the noise coming up from the SMPSU/processor from the= old=20 Dell puter - cable is double screened - choking off using J (75)= type=20 has seen little improvement - this is my last hurdle to unimpeded remo= te rx=20 on 137 - any pointers appreciated - everythings bonded and Ive tried= the=20 on/off earth tricks at various locations -
 
Anyone had an= y=20 success of powering a Dell D series from a non standard non switched= PSU?=20 (the noise goes away when the DC from the Black Dell brick is removed= but it=20 may also be partially screen/processor noise...)
 
with=20 thanks
 
Laurence Kl7UK

The New Busy think 9 to 5 is a cute idea. Combine multiple calendars= with=20 Hotmail. Get=20 busy.

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