I used to hate aluminum wires when it comes to soldering.
I have had a change of heart.
Solid coppers wires break as often as taxes go up.
With stranded aluminum wires, you may lose a few, but you can still solder.
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For years, I have been looking for something to increase "the mating of wire and solder."
I decided to try solder flux which is used for copper pipes.
What a difference. :-)
Andy