When I found a regular PCB drawing of a 100W amplifier circuit that I had in mind for a long time, I went into practice. Darlington (TIP147 TIP142) power transistors are used in the circuit output. Ideal for active... Electronics Projects, 100W Power Amplifier TIP147 TIP142 Transistors (Pro and Simple version) "audio amplifier circuits, transistor amplifier, " Date 2021/09/19