I can only concur with Jeff Seeger's response. I can add that for reflow soldering the 50-mil pitch creates a high thermal mass because of the many densely packed PTVs and pins (many of these connectors have high thermal masses themselves and act as heat sinks). You may try some aggressive preheating and soaks in the ramp-soak-spike profile that are as long and as high as the flux in the paste will permit. For wave soldering some aggressive air knives after the wave as well as non-protruding shorter pins may help. Werner Engelmaier Engelmaier Associates, Inc. Electronic Packaging, Interconnection and Reliability Consulting 23 Gunther Street Mendham, NJ 07945 Phone & Fax: 201-543-2747 E-mail: [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************