The following summarizes the responses which were provided to my inquiry on this email list seeking suppliers and recommendations for sockets for a 50x50 mm package with 2401 balls on 1 mm pitch. I noted if there was a user-recommendation or self-recommendation (sales) provided. Everett Charles Technologies http://www.ectinfo.com/ caveat: depending on maximum speed. Ironwood Electronics http://www.ironwoodelectronics.com/catalog/indexes/main.cfm?ID=10&ProcessID= 9 user-recommendation: expensive, high performance, small footprint, can be replaced by chip later, will custom produce to any size. Andon Electronics Corporation www.andonelect.com user-recommendation: real good luck. Altanova 408-225-7011 user-recommendation. Oztek user-recommendation: expensive, high performance. Wells CTI user-recommendation: not sure they have high performance sockets. Tecknit (fuzz button test sockets), http://www.fuzzbuttons.com Dimensions Consulting Inc (DCI) http://www.dci-us.com/products/ user-recommendation; includes former Liberty Sockets. Tyco HXC 2076 BGA http://catalog.tycoelectronics.com/TE/bin/TE.Menu?M=MENU&ID=16793&I=13 self-recommendation. High Performance Test (custom machined test sockets for high pincount BGAs) http://www.hptestusa.com/ self-recommendation. K&S Package Test http://www.kns.com user-recommendation: good support, mechanical reliability, SI impact unknown but used to 3.125 G. Gryphics self-recommendation: high power, high frequency, high ball count, http://gryphics.com/html/bga2.html. DCI UMDTech www.umdtech.com user-recommendation: competitively-priced, good support, very reliable high speed sockets. Emulation Technology, Inc. http://www.emulation.com self-recommendation. Thanks to all who replied. Kevin Buchs Mayo Clinic 200 1st St. SW Rochester, MN 55901 buchs.kevin@xxxxxxxx 507-538-5459 http://www.mayo.edu/sppdg ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu