Back of brain suggests that : - With gold-gold there is a voltage above which wetting is less critical. - 28V is / may be above that voltage - 50V more so (ye olde telecom switching systems) Front of brain says that back of brain is not always trustable. Russell > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .