Originally Posted by
Hydro Junkie
Yes, it will. Any time electricity is sent though a wire, solder joint or anything else, it creates a magnetic field. Over time, most metals will become magnetized. Silver solder is very susceptible to this and will, in a very short time, stop conducting electricity. Anything made with ferrous metals will do the same, again in a very short time. Copper and aluminum are the most resistant but, like everything else, resistance is not proof against something
Standard solder for electronics work is lead/tin. Soldering battery leads AND radio circuits with it WILL NOT cause magnetism problems. In all the electronics assembly and work I've done including digital circuits, never had a problem with it. However, I've had problems with a magnetized screwdriver near radio circuits. I've brazed with silver solder, definitely not suitable for hand assembled / repaired electronics.