[miceuz] found a nice DIY RIAA preamp project and found a nice little op amp somewhere in his parts bin. After laying out the circuit, [miceuz] etched a few boards and taught his friend how ...

It’s a handy small discrete audio amplifier if you want one ... even if you don’t work with them every day. A basic circuit can be found in the LM386 data sheet (PDF), but as is always ...