Is anyone familiar with gas leakage paths through soft soldered joints? Part of a vacuum electron device which I am working with has a puzzling leak. It occurrs only when the device is at a temp of 85C or above. The joint is between a cold-rolled steel piece and a Carpenter-42 piece. We suspect it is either in the solder itself or in the interface between the solder and the cold rolled steel. Appreciate all input. Thanks, Sam ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################