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 circuit is from an old documentation making use of a 3,579,645 MHz analog color television...
This 741 operational circuit can be found with slight variations in this section and on this site....
In the figure we have a solar power source for experiments with this type of energy. The cells must...