Return-Path: Received: from mtain-dc10.r1000.mx.aol.com (mtain-dc10.r1000.mx.aol.com [172.29.64.138]) by air-me01.mail.aol.com (v129.4) with ESMTP id MAILINME012-8ba14c4db726c; Mon, 26 Jul 2010 12:26:15 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dc10.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9E85938000335; Mon, 26 Jul 2010 12:26:12 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OdQUM-0005Ei-Ri for rs_out_1@blacksheep.org; Mon, 26 Jul 2010 17:25:14 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OdQUL-0005EW-S8 for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 2010 17:25:13 +0100 Received: from smtp5.freeserve.com ([193.252.22.151] helo=smtp6.freeserve.com) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OdQUK-00058M-F1 for rsgb_lf_group@blacksheep.org; Mon, 26 Jul 2010 17:25:13 +0100 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3533.me.freeserve.com (SMTP Server) with ESMTP id EF8DD1C0009A for ; Mon, 26 Jul 2010 18:25:06 +0200 (CEST) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3533.me.freeserve.com (SMTP Server) with ESMTP id E20BD1C0009D for ; Mon, 26 Jul 2010 18:25:06 +0200 (CEST) Received: from AGB (unknown [91.109.0.163]) by mwinf3533.me.freeserve.com (SMTP Server) with SMTP id 6920A1C0009A for ; Mon, 26 Jul 2010 18:25:06 +0200 (CEST) X-ME-UUID: 20100726162506430.6920A1C0009A@mwinf3533.me.freeserve.com Message-ID: From: "Graham" To: References: <92F6B0CB5F307544B1F54305F95265AB169DF1@API.clb.tcfr.thales><379486.49929.qm@web86706.mail.ird.yahoo.com> In-Reply-To: Date: Mon, 26 Jul 2010 17:25:06 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 X-Antivirus: avast! (VPS 100726-0, 26/07/2010), Outbound message X-Antivirus-Status: Clean 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="----=_NextPart_000_006F_01CB2CE7.7D491480" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=HTML_30_40,HTML_FONTCOLOR_BLUE, HTML_FONTCOLOR_UNSAFE,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: 3039ac1d408a4c4db7246de1 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_006F_01CB2CE7.7D491480 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes , Dell batteries also have a serial number within, fried of mine br= ought a 'new' battery while he was working on a big IT project in In= dia , only no serial / type number .. it worked but after paying fu= ll price he took it back ..slight resistance until the shop realise= d 'he' knew what he was talking about .. G ..=20 From: Andy Talbot=20 Sent: Monday, July 26, 2010 2:30 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Noise R75 - rs232 from smpsu - I've just ordered a couple of the DS2502 one-wire EEproms contained in= the Dell PSU to tray hacking the contents to make a custom PSU. But= there's a long delivery time on them from Farnell, so that's one pro= ject on hold until October. Look easy enough to read and write, but they will need a custom PIC in= terface as the one-wire protocol is time-slot based. Standard EEProm= programmers can't do the job.. Apparantly, from people who have managed to read the Dell PSU EE cont= ents, it contains ASCII text giving the voltage and current rating, an= d the same serial number as appearing on the label. One disconcerting finding - every chip has a unique fixed 48 bit seria= l number 'lasered' into it at manufacture. So any Dell PSU, (or in= fact any other product that uses these chips as an electronic serial= number) can be uniquely identified - if anyone ever bothered to keep= a record. Don't think it can be read out via the Windoze operating= system. Bit if the part of the Bios that read the PSU data could be= identified, its possible to envision a piece of software that could= tell you which PSU was plugged into it. =20 Big Brother could be watching you even more closely. Andy www.g4jnt.com On 26 July 2010 14:10, Dave Pick wrote: Jean-Louis I had a 12V car/aeroplane adaptor for one of my Dells, made by a com= pany called LL Power inc. Dell used to sell them as accessories. LL Power have a web-site at= http://www.llpower.com Remember that these switch-mode adapters will cause RF interference! Dave G3YXM ----------------------------------------------------------------------= -------- From: "Jean-Louis.RAULT@fr.thalesgroup.com" To: rsgb_lf_group@blacksheep.org Sent: Monday, 26 July, 2010 8:13:05 Subject: RE: LF: Noise R75 - rs232 from smpsu - Dear all, Do you know if there is any 12 V DC power supply supplier for the DE= LL laptops ? Jean-Louis F6AGR ----------------------------------------------------------------------= ------ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_gro= up@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 sor= ts of power supplies. The nominal voltage can go a goodly 10 - 20% ei= ther way before it flags an error - and they seem to detect over volta= ge 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 thr= ee way coaxial DC connector (it has a very thin centre pin) - the PSU= contains a DS2502 one-wire EEPROM.. The Laptop interrogates the PS= U 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 br= ick to get the EEPROM and incorporate it into the connector for the ne= w PSU. Those EEPROMS are supposed to be easy enough to read, so when I ne= ed 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 th= e old Dell puter - cable is double screened - choking off using J (75)= type has seen little improvement - this is my last hurdle to unimpede= d remote rx on 137 - any pointers appreciated - everythings bonded and= Ive tried the on/off earth tricks at various locations -=20 =20 Anyone had any success of powering a Dell D series from a non st= andard non switched PSU? (the noise goes away when the DC from the Bla= ck Dell brick is removed but it may also be partially screen/processor= noise...) =20 with thanks =20 Laurence Kl7UK ----------------------------------------------------------------------= ---- The New Busy think 9 to 5 is a cute idea. Combine multiple calen= dars with Hotmail. Get busy. ------=_NextPart_000_006F_01CB2CE7.7D491480 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Yes ,
 
Dell   batteries also = have a =20 serial  number within, fried of mine brought a   'new'= battery=20 while he was working on a big IT project in India , only  no = ; serial /=20 type number .. it worked  but after paying full  price he to= ok it back=20 ..slight resistance until  the  shop realised 'he'  kne= w =20 what he was talking about ..
 
G ..

Sent: Monday, July 26, 2010 2:30 PM
Subject: Re: LF: Noise R75 - rs232 from smpsu -

I've just ordered a couple of the DS2502 one-wire EEproms co= ntained in=20 the Dell PSU to tray hacking the contents to make a custom PSU. &= nbsp; But=20 there's a long delivery time on them  from Farnell, so that's one= project=20 on hold until October.
Look easy enough to read and write, but they will need a custom= PIC=20 interface as the one-wire protocol is time-slot based.   Sta= ndard=20 EEProm programmers can't do the job..
 
Apparantly, from people who have managed to read the Dell PSU &nb= sp;EE=20 contents, it contains ASCII text giving the voltage and current rating= , and the=20 same serial number as appearing on the label.
 
One disconcerting finding - every chip has a unique fixed 48 bit= serial=20 number 'lasered' into it at manufacture.   So any Dell PSU,= (or in=20 fact any other product that uses these chips as an electronic serial= number) can=20 be uniquely identified - if anyone ever bothered to keep a record.&nbs= p; =20 Don't think it can be read out via the Windoze operating system. =   Bit=20 if the part of the Bios that read the PSU data could be identified, it= s possible=20 to envision a piece of software that could tell you which PSU was plug= ged into=20 it.    
Big Brother could be watching you even more closely.
 
On 26 July 2010 14:10, Dave Pick <davepick@btintern= et.com>=20 wrote:
Jean-Louis

I=20 had a 12V car/aeroplane adaptor for one of my Dells, made by a compa= ny called=20 LL Power inc.
Dell used to sell them as accessories. LL Pow= er have a=20 web-site at = http://www.llpower.com
Remember that these=20 switch-mode adapters will cause RF interference!

Dave G3YXM

From: "Je= an-Louis.RAULT@fr.thalesgroup.com" <Jean-Louis.RAULT@f= r.thalesgroup.com>
= To: rsgb_lf_group@blacksheep.org
Sent: Monday, 26 July, 2010=20 8:13:05
Subject:= RE: LF:=20 Noise R75 - rs232 from smpsu -

Dear=20 all,
 
Do you=20 know if there is any 12 V DC power supply supplier for the DELL lapt= ops=20 ?
 
Jean-Louis=20 F6AGR

From: owner-rsgb_l= f_group@blacksheep.org [mailto:owner-rsgb_lf_group@bla= cksheep.org] On Behalf Of=20 Andy Talbot
Sent: Friday, July 23, 2010 11:05 PM
= To:=20 rsgb_lf_group@blacksheep.org
Subject: Re: LF:=20 Noise R75 - rs232 from smpsu -

Yes, I've played with running laptops including Dells from al= l sorts of=20 power supplies.  The nominal voltage can go a goodly 10= - 20%=20 either way before it flags an error - and they seem to detect= over=20 voltage and take evasive action, although couldn't guarantee all= do.
 
BUT there's a big snag with Dells.  If youv'e got one wi= th the=20 three way coaxial DC connector (it has a very thin centre pin) -= the PSU=20 contains a DS2502  one-wire EEPROM..   The Laptop= =20 interrogates the PSU to find out if its satisfactory and if the EE= PROM isn't=20 present, the laptop will use the external power, but refuse to cha= rge the=20 battery.    On a 12V input mobile PSU I had to= butcher a=20 surplus Dell black brick to get the EEPROM and incorpora= te it into=20 the connector for the new PSU.
 
Those EEPROMS are supposed to be easy enough to read, so when= I need=20 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=20 of the R75 Rx> - the noise coming up from the SMPSU/processor= from the=20 old Dell puter - cable is double screened - choking off usi= ng J (75)=20 type has seen little improvement - this is my last hurdle to uni= mpeded=20 remote rx on 137 - any pointers appreciated - everythings bonded= and Ive=20 tried the on/off earth tricks at various locations -
 <= BR>Anyone=20 had any success of powering a Dell D series from a non standard= non=20 switched PSU? (the noise goes away when the DC from the Black De= ll brick=20 is removed but it may also be partially screen/processor=20 noise...)
 
with thanks
 
Laurence Kl7UK

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




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