This circuit was obtained in a Motorola documentation from 1968. The circuit uses a power transistor of the time. Modern equivalents according to the load current and voltage can be used.
This circuit that imitates the sound of the cowboys' calls with their “louder” was found in a...
We found this circuit loader in a French magazine Electronique Radio Plans from July 1993. The...
We have in the figure a traditional amplifier configuration with operational amplifier. The source...