This circuit scan all the preamplifier entries to identify where is a audio signal and that entry remains selected. After a sign of signal absence, scanning resumes. Scanning action is supported by ...

The circuit was designed to produce a preamplifier with symmetrical audio input while the output operates in Class A type. The circuit was designed to produce a preamplifier with symmetrical audio ...

The most recent installment of [Dino Segovis’] Hack a Week covers the construction of a simple NPN transistor audio preamp. Some time ago, he built a small audio amplifier using an LM386 which worked ...

If you’ve wondered what a preamplifier is, what it exactly does, and whether your audio setup is missing one, we’ve got the ...