Ask your lumber dealer if he can give you a sarnple chip or small scrap. Occasionally you need to polish some copper before you try soldering to it. A small piece of very fine sandpaper is a good addition to your soldering kit. Solder does not make a strong mechanical joint. Where possible wrap the wires or hook them through the holes in a jack, etc. 2.
Excess heat can damage electronic components.
When soldering a wire to an electronic component, tin the wire with solder, place it against the connection on the electronic component, and briefly touch the very tip of the soldering iron to the connection. When soldering to non-electronic components such as jacks, plugs, etc., you must apply enough heat to the heavier metal contacts to make the solder flow on the metal connections. If you don't get the metal hot enough you will get what is called a cold joint . The wire will still wiggle in the hole and will not make a good electrical connection. All components must be clean and free of oil or contaminants before soldering.