I have pretty good luck with brazing using Sil-Flo. The joints are strong,
don't leak, don't have much if any "drip".
But usually I have to clean them afterwards because Sil-Flo doesn't start to
flux and sweat well until almost to the boiling point, and that gets the
whole joint hot enough that there's lots of oxidation around afterwards.
Ken's joints look neater than mine, but still need cleaning.
I've always admired the joints I see in a new unit. I assume they're either
heated super-fast with a ring burner, or they are induction heated. You can
hardly see any discoloration, much less oxidization.
What rods do you guys use to make pretty brazed joints? Is Sil-Flo a bad
choice, or is my technique the problem?
What about tuning the flame? Reducing, oxidizing, neutral?