this post was submitted on 29 Nov 2023
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A speaker crossover is one of the best choices to learn good soldering. It isn't difficult if you follow good practice.
Use sandpaper to strip back some enamel on your inductor leads.
Clean all your leads with isopropyl alcohol before assembly. Dust or oil can degrade joint quality.
Grab some 63/37 solder, .6mm thickness is good for most projects. This is ideal for beginners, as it immediately goes from solid to liquid at the correct temperature, and you won't accidentally add too much solder to your joints.
Set your soldering iron to 300C, up to 350 for large joints. Although usually you should try a larger tip before raising the temp.
Tin the tip of your soldering iron first, then the tip of each lead.
Twist the leads together with pliers. Use some tape or helping hands to hold components in place while soldering.
Apply heat to the joint as you gradually feed in solder.
If you apply too much solder, use some stranded wire to wick away the excess.