For an 8 ohm load, this Motorola circuit was found in a 1968 documentation. The transistors are of the time and the power supply must be symmetrical.
We find this circuit in a 1980s documentation. The circuit uses uncommon components today which can...
We found this circuit in a 1977 Radio Shack documentation. The circuit should be powered, for...
With the circuit shown in the figure it is possible to digitally control the gain of an...