[Elecraft] High Altitude Solder

[Lynn Burlingame]

I plan to do a lot of mountaintopping in the next few years and will
be assembling a K1 for this specific use.  I need to locate a good
source for MILSPEC high altitude solder that meets Elecraft's
specifications and will not void the warranty.  The reported 22%
increase in equipment efficiency will make the extra expense
worthwhile.  Does anybody know of a vendor that still sells it?  Are
there any special precautions or procedures for using this solder?

Lynn
N7CFO