While most passive components are very reliable, reliability is just as important for the amateur as for the professional. To us, a breakdown may mean a frustrating search with inadequate instruments for the defective component. This can be especially trying when you have just built a published circuit and it does not work. Reliable components do tend to be expensive when bought new but may sometimes be bought at rallies if you know what to look for. The aim of this chapter is to give some guidance. If you test components before using, you save yourself from this troubleshooting.
NB This mini-book download has been optimised for use with Adobe Acrobat. Reading of it in other PDF readers or browsers may cause unwanted behaviours, so is not reommended. A free Windows edition of Acrobat Reader can be found here along with links to editions suitable for other operating systems.