Electronic type solder will not work, and a gun will not supply enough heat to do the job. Most jewelry soldering is done with a propane torch and silver solder. The trick with any kind of solder is that the metal you are working with has to get hot enough so that it is the metal which melts your solder and not the soldering iron or gun. This why some metals cannot be soldered, they can't take the necessary heat. Once the solder melts, you have to remove the heat source and make sure that the pieces don't move or you will get a cold solder joint, which is a bubble in the hardened solder caused by the movement before the joint cooled sufficiently. I am one of those old electronics techs they were talking about that used to work with vacuum tubes, but I haven't done much jewelry work.
"A day spent in the fields and woods, or on the water should not count as a day off our allotted number upon this earth."
Jerry, Kilted Old Fart.
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