Rick, I have a similar experience with PCI card cage brackets. This architecture was never intended for today's environment. We have used various gasketing techniques. Some OEMs now include clips on the chassis to aid in the electrical seal with the card bracket. A.K. Stamping has a patent on one add-on gasket (US 5,856,632). The first problems we found were with ESD testing, not radiated EMI. Now, we have seen problems with both. Even a gasketed PCI card cage is mediocre as a shielded enclosure. Regards, Jim
Jim Knighten, Ph.D. Teradata, a Division of NCR http://www.ncr.com <http://www.ncr.com> 17095 Via Del Campo San Diego, CA 92127 USA Tel: 858-485-2537 Fax: 858-485-3788 [email protected] <mailto:[email protected]> -----Original Message----- From: [email protected] <mailto:[email protected]> [mailto:[email protected]] <mailto:[mailto:[email protected]]> Sent: Friday, August 30, 2002 7:54 AM To: [email protected] <mailto:[email protected]> Subject: PCI Brackets Problems I am fighting the age old problem of PCI brackets on various PC chassis not making adequate electrical contact. Aperture leaks, especially at high frequencies, is a continual problem, to say nothing about the flimsy construction of the brackets. Has anyone had any success with the clips, gaskets and other EMI solutions? If you have any suggestions on types, or manufacturers please let me know. Thanks in advance... Rick Busche Evans & Sutherland [email protected] <mailto:[email protected]> ------------------------------------------- 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/ <http://www.ewh.ieee.org/soc/emcs/pstc/> To cancel your subscription, send mail to: [email protected] <mailto:[email protected]> with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] <mailto:[email protected]> Dave Heald: [email protected] <mailto:[email protected]> For policy questions, send mail to: Richard Nute: [email protected] <mailto:[email protected]> Jim Bacher: [email protected] <mailto:[email protected]> All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ <http://ieeepstc.mindcruiser.com/> Click on "browse" and then "emc-pstc mailing list" Jim Knighten, Ph.D. Teradata, a Division of NCR http://www.ncr.com 17095 Via Del Campo San Diego, CA 92127 USA Tel: 858-485-2537 Fax: 858-485-3788 [email protected] ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
