In a message dated 4/8/04 10:52:47, [log in to unmask] writes: > Regarding your last comment, if the lead / foot wasn't solderable at all > would you expect the formation of a joint ie. a nice meniscus as we have, > though obviously a weak metallurgical bond I wouldn't have thought so! > Hi Iain, Yes, you get nice looking 'solder joints' which are NOT solder joints because no metallurgical bond has formed. Externally, these 'joints' are indistinguishable from good ones. 215°C may be insufficient--hand soldering provides much more heat; but without prying these hand-soldered joints apart and seeing what the failure mode is [interfacial vs. through the solder], you actually do not know whether hand-solderiing improved the situation oyher than adding more solder volume. Regards, Werner Engelmaier --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------