Return-Path: Received: from mtain-mj07.r1000.mx.aol.com (mtain-mj07.r1000.mail.aol.com [172.21.164.91]) by air-dd04.mail.aol.com (v129.4) with ESMTP id MAILINDD042-86324c4d35e2328; Mon, 26 Jul 2010 03:14:43 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mj07.r1000.mx.aol.com (Internet Inbound) with ESMTP id 68D90380000D3; Mon, 26 Jul 2010 03:14:41 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OdHsF-0002kd-Nj for rs_out_1@blacksheep.org; Mon, 26 Jul 2010 08:13:19 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OdHsE-0002kU-TL for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 2010 08:13:18 +0100 Received: from thsmsgxrt13p.thalesgroup.com ([192.54.144.136]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OdHsD-0000dV-UQ for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 2010 08:13:18 +0100 Received: from thsmsgirt22p.corp.thales (unknown [10.33.231.6]) by thsmsgxrt13p.thalesgroup.com (Postfix) with ESMTP id 9F0E9360FCA for ; Mon, 26 Jul 2010 09:13:11 +0200 (CEST) Received: from thsmsgiav11p.corp.thales (10.33.231.31) by thsmsgirt22p.corp.thales (8.5.103) id 4C2364000045D964 for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 2010 09:13:11 +0200 Received: from (unknown [10.33.231.2]) by thsmsgiav11p.corp.thales with smtp id 1a1a_1cbd_3ff49b18_9885_11df_815d_001143d32df6; Mon, 26 Jul 2010 09:13:11 +0200 Received: from NODALNET.clb.tcfr.thales (unknown [10.33.8.19]) by thsmsgirt12p.corp.thales (Postfix) with ESMTP id 655AD391BCE for ; Mon, 26 Jul 2010 09:13:11 +0200 (CEST) Received: by nodalnet.clb.tcfr.thales with Internet Mail Service (5.5.2653.19) id <335F4VP2>; Mon, 26 Jul 2010 09:13:11 +0200 Message-ID: <92F6B0CB5F307544B1F54305F95265AB169DF1@API.clb.tcfr.thales> From: Jean-Louis.RAULT@fr.thalesgroup.com To: rsgb_lf_group@blacksheep.org Date: Mon, 26 Jul 2010 09:13:05 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,NO_REAL_NAME=0.55 Subject: RE: LF: Noise R75 - rs232 from smpsu - Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CB2C91.FE500472" 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_20_30,HTML_FONTCOLOR_BLUE, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE,NO_REAL_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: 3039400c89ae4c4d35e1766a X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none ------_=_NextPart_001_01CB2C91.FE500472 Content-Type: text/plain Dear all, Do you know if there is any 12 V DC power supply supplier for the DELL laptops ? Jean-Louis F6AGR _____ From: owner-rsgb_lf_group@blacksheep.org [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 supplies. The nominal voltage can go a goodly 10 - 20% either way before it flags an error - and they seem to detect over voltage and 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 way coaxial DC connector (it has a very thin centre pin) - the PSU contains a DS2502 one-wire EEPROM.. The Laptop interrogates the PSU to find out if its satisfactory and if the EEPROM isn't present, the laptop will use the external power, but refuse to charge the battery. On a 12V input mobile PSU I had to butcher a surplus Dell black brick to get the EEPROM and incorporate it into the connector for the new PSU. Those EEPROMS are supposed to be easy enough to read, so when I need one again, will read the contents and stick them into a fresh chip. Andy www.g4jnt.com On 23 July 2010 21:47, Laurence KL7UK > wrote: Anyone done any common mode noise mitigation from the RS232 port of the R75 Rx> - the noise coming up from the SMPSU/processor from the old Dell puter - cable is double screened - choking off using J (75) type has seen little improvement - this is my last hurdle to unimpeded remote rx on 137 - any pointers appreciated - everythings bonded and Ive tried the on/off earth tricks at various locations - Anyone had any success of powering a Dell D series from a non standard non switched PSU? (the noise goes away when the DC from the Black Dell brick is removed but it may also be partially screen/processor noise...) with thanks Laurence Kl7UK _____ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. Get busy. ------_=_NextPart_001_01CB2C91.FE500472 Content-Type: text/html
Dear all,
 
Do you know if there is any 12 V DC power supply supplier for the DELL laptops ?
 
Jean-Louis F6AGR

From: owner-rsgb_lf_group@blacksheep.org [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 supplies.  The nominal voltage can go a goodly 10 - 20% either way before it flags an error - and they seem to detect over voltage and 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 way coaxial DC connector (it has a very thin centre pin) - the PSU contains a DS2502  one-wire EEPROM..   The Laptop interrogates the PSU to find out if its satisfactory and if the EEPROM isn't present, the laptop will use the external power, but refuse to charge the battery.    On a 12V input mobile PSU I had to butcher a surplus Dell black brick to get the EEPROM and incorporate it into the connector for the new PSU.
 
Those EEPROMS are supposed to be easy enough to read, so when I need one again, will read the contents and stick them into a fresh chip.
 
On 23 July 2010 21:47, Laurence KL7UK <hellozerohellozero@hotmail.com> wrote:

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

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

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