Quote:
Originally Posted by rufus13 
The only place I have been where silver-bearing solder must be used is in the ceramic stand-offs of Tektronix oscilloscopes. My 545A has these.
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About 15 years ago we had a bunch of Fostex headphones (model T-20 I believe)
that used silver solder instead of normal solder. A real pain to work with. I had to
crank up the iron temperature by about 100 degrees to get the stuff to melt properly. 63/37 or 60/40 works fine for everything I need to do.