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Choice of solder - 63/37 vs 60/40
#11
I personally just use flux on all of my projects. It makes things so much easier by getting rid of all the oxides, and making the solder flow so well.

Even with my worst solders, it helps tremendously IMO.

What can also help is preheating the surface. I will never preheat the cells for obvious reasons, but heating a PCB to say 40-60C, or even 80C, can help a lot with soldering.

TLDR: Use good solder, good flux, preheat your work surface so you make your work as easy as possible. Time is worth more than money.
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#12
Flux really is nessasary for good solder flow and wetting... It's rare that I won't use it, but on new/clean components (through hole / PCB soldering) what is inside good solder does an amazing job without extra.

I do have a tendency to over flux, making a mess, but without it the work is difficult to do.

It took many years in my earlier days before I learned about flux haha.
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#13
(09-14-2018, 05:24 AM)Crimp Daddy Wrote: Flux really is nessasary for good solder flow and wetting... It's rare that I won't use it, but on new/clean components (through hole / PCB soldering) what is inside good solder does an amazing job without extra.

I do have a tendency to over flux, making a mess, but without it the work is difficult to do.

It took many years in my earlier days before I learned about flux haha.

I usually don't use flux on clean surfaces. I clean the surface with isopropyl alcohol if it is dirty. I use a damp soldering sponge to keep my iron clean. If I require it, I use a rosin block to clean the tip of my iron. I find that thin solder with 2% flux is heaps, so long as the iron and surface is clean.

When tinning wire, I like to dip in soldering paste. It sucks up the solder like a sponge.

What do you use for flux?
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#14
I rarely use extra flux. I have it in the solder directly and it works fine. Been doing like that for over 20 years now.
I add extra flux on for instance very very dirty cells since I would never sand a cell.. They DO corrode over time if you do that... Smile
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