I'll go along with MinniFlyer, I use electical solder with no problems. silver solder is overkill. I do not use acid core solder or acid flux as, unless you really clean the joint and neautralize the acid, you joint will corrode and weaken in time. For normal 4-40 or 2-56 cvlevises, a good soldering iron works better than a torch, just use at least a 60 to 100 watt iron.