Sure like what you, and others, say about gold, OSP's, and silver. Wish you could convince 90% of the other engineers designing as if some very old "traditions" had merit. Also, thermal is a concern. Some of the amps get very hot. Some engineers really fight using any type thermal transfer improvement as grease or whatever. Earl Moon --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------