This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
This is one of the many approaches we have on the site for this low power 0.5 W amp using the...
The circuit shown can be used in an audio link using visible light or IR. Any photo transistor can be...
This circuit is from an American documentation of the 1980s. The circuit can be implemented with more...