Motorola Power Amplifier 1970

Motorola Power Amplifier 1970 Motorola Power Amplifier 1970

Decided to resurrect an old circuit which I first built in the 1970's from a (1970/71) Motorola design, a basic design like the RCA one from the same era. I used mainly original circuitry except for the output transistors, the differential inputs and the bias diodes. I had the MD8002 dual transistors and MZ2361 diodes but decided to use BC182L's and selected 1N400x for forward voltage drop. It sounded okay, managed to burn out several 100ohm resistors while in the construction but hey ho...

Here is the abridged pdf of the Motorola audio circuit design:

Motorola Audio Circuit Design with Silicon Complementary Pairs - 1970