[Elecraft] Radio Shack Solder ??

[AJSOENKE at aol.com]

The 63/37 is what is called eutectic solder because it has a very sharp 
melting temp dip at the eutectic temperature of tin/lead alloy. It can be difficult 
to solder with because it has almost no pasty state going almost directly 
from liquid to solid. Its primary use is for rapid soldering processes that are 
usually automatic. It also has one other use, because it is the lowest melting 
temperature tin/lead alloy, it can be used in special applications called two 
stage soldering. It this process an initial soldering of a component is done 
usings, say 60/40 or maybe 50/50 which has a higher melting point, and can then 
have additional soldering done with  the 63/37 without causing it all to come 
apart. Obviously this type process would require extreme control of soldering 
tools.
 
Al, WA6VNN



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