Hi ya Steve, I'm thinking that designs such as these cannot be wave soldered with any good results. Am I wrong in thinking that? Do these designs have to be hand built? Am I just spinning my wheels trying to wave solder them? I've seen a couple of heat sinks from . . . We usually wave solder the easy components, clean, apply the heat sinks, clean again, bake, and hand solder the toughies. Would a rework station be any help? That's a guess, we're looking at getting a mini-wave system next fiscal. How ancient - 70's, 80's, or early 90's? Hans ~~~~~~~~~~~~~~~~~~~ Hans M. Hinners Materials Engineer (Process & Manufacturing) Warner Robins Air Logistics Center Avionics Production Division Manufacturing Branch 380 Second Street, Suite 104 Building: 640, Mail Stop: LYPME Robins AFB, GA 31098-1638 Voice: (912) 926 - 1970 Fax: (912) 926 - 7164 mailto:[log in to unmask] http://www.robins.af.mil ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################