Sol322, i have a pretty good idea of how to solder and would venture to say that i've performed well in excess of 100,000 solder joints in the last few years. Even with all of the past experience that i have and trying to "clean and prep" the surface, i could not get silver bearing solder to bond some joints on two mating surfaces. I even went so far as to grind the surface clean and "rough it up" so that the solder could fill in the crevices, applied rosin, used a small propane torch to pre-heat the surface, etc... with no luck. I also watched as two others that are skilled electronics professionals tried to make the same connection with no luck. Maybe it was funky solder, i don't know. Either way, all three of us gave up. Sean
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