[Elecraft] [K3] what kind of solder and flux?

[David Ferrington, M0XDF]

What kind of solder is used on the SMD in the K3? Leaded or Unleaded ?
And what kind of flux was used.

And not to start a another very long thread, what would people suggest  
for flux when doing mods?
I'll use the same solder type. But maybe water soluble flux is not  
such a good idea for manual rework?
73 de M0XDF, K3 #174
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