Getting Started in Audio DIY

Part of an example FAQ - What Kind of Solder Should I Use?

There are many types of solder. The three main variables are the alloy type, the thickness of the solder wire, and the type of flux it carries.

The cheapest type of solder for electronics is 60/40 solder — 60% tin, 40% lead. A nicer alloy is 63/37; this is a "eutectic" blend, which means it transitions straight from liquid to solid without a pasty state in between. With non-eutectic solders, you have to be careful to keep the joint still while it goes through this pasty state or it may not form properly. If the solder joint doesn't solidify properly, it will eventually fail.

If you want to get exotic, there are various blends with silver, varying from about 2-4%. Some of these have significantly higher melting points than standard solder and many are non-eutectic, so they may be harder to use. The advantages are that silver conducts better, joins to various metals better, and is better for surface-mount work. If you want a eutectic silver-bearing solder with a relatively low melting point, I recommend the 62/36/2 alloy (tin/lead/silver).

Go to the above webpage for full details or Back to Theory