Doug Is the CuBe catalog available on the web as I would like to have a look at it?
Thanks John Allen From: Doug Smith [mailto:d...@emcesd.com] Sent: 28 March 2003 04:51 To: George Stults Cc: Cortland Richmond; lfresea...@aol.com; ieee pstc list Subject: Re: OK, what's going on? Hi George and the group, The black marking is corrosion products from incompatible metals (too far aprart on the electrochemical series). CuBe springs are in this category for most chassis metals and should not be used uncoated. The little coating chart at the end of the catalog is the most important information in the catalog! Doug George Stults wrote: > I suppose that vibration may be good to a point, but I offer the > following. I bought a pair of PC's (These were Dell Dimension 500 and > they did pass Class B) out of the box. I found however that after many > repeated trips to the lab in my car, they no longer did. The I/O > connectors did degrade somewhat, but the noise leakage was traced to the > case. It appeared that the problem was fretting due to vibrating metal > to metal contacts along various seams in concert with some kind of > coating on the surfaces. Where metal fingers met metal surface, a kind > of black marking had developed and I found it couldn't be cleaned with > alcohol etc. Light sandpapering didn't help much either, although I > suppose a dremel tool might have worked. Copper tape along the affected > seams did work, but of course then, I had modified it.... > > George Stults > WatchGuard Technologies Inc. > > -----Original Message----- > From: Cortland Richmond [mailto:72146....@compuserve.com] > Sent: Thursday, March 27, 2003 11:10 AM > To: lfresea...@aol.com; ieee pstc list > Subject: Re: OK, what's going on? > > > Derek wrote: > >>> the EUT should have been exposed to simulated shipping and >> > installation > by a user... << > > FWIW, in the 1980's I worked in an audit lab where we tested samples of > shipped equipment for FCC, vibration, heat, humidity, temperature, > TEMPEST... it was not uncommon for equipment to do BETTER in EMC tests > after it had been subjected to vibration testing. With oils, oxides and > so > on having been abraded, metal parts made better contact with each other. > > > > Cortland > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > > -- ___ _ Doug Smith \ / ) P.O. Box 1457 ========= Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----( ) | o | Email: d...@dsmith.org \ _ / ] \ _ / Website: http://www.dsmith.org This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc _____________________________________________________________________ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.com ************************************************************************* Copyright ERA Technology Ltd. 2003. (www.era.co.uk). All rights reserved. The information supplied in this Commercial Communication should be treated in confidence. No liability whatsoever is accepted for any loss or damage suffered as a result of accessing this message or any attachments. _____________________________________________________________________ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.com This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
