system
Given the following post, respond as if you're commenting on Reddit:
human
Will a solder GUN harm magnets, if so how?

I recently took a job helping repair guitar pickups, and our shop installs them with a solder gun.  I have seen people say these can harm pickups, but I cannot find any info when I google this.  We plan on taking a ceramic magnet to the gun directly and seeing what happens, but can someone explain to me what to expect?

I personally use a solder iron and bring mine in when I do install and repair jobs, but now we are all curious.
gpt
Heat can damage magnets (or rather, cause them to demagnetize). Soldering guns are *in general* higher wattage than soldering pencils. If the gun is way over-powered for the soldering you're doing, it can cause the work to get hotter than it needs to. Amusingly, a too-small soldering pencil can *also* cause overheating, because you need to apply it longer to heat up the soldering lug.

For most electronic soldering, what you really want is a temperature-controlled soldering station. More expensive, but they're easier to get consistent results with.