This circuit can deliver up to 15V per section (-15 and +15), or up to 30V as a whole, for the consumption of up to 2A, but with some changes could be modified to provide up to 5A ** (or more). Transistors Q1 and Q2 should be installed on a heat sink, as well as integrated and LM337T LM317 which is in the TO-220 package.
