This circuit was found in a 90s Radio Electronics. It is intended to amplify the sound channel of analog televisions of the time. The integrated circuit used is uncommon today.
In the figure we have the basic configuration of a regulator for 12 V x 1 A suggested by Motorola in...
This circuit for 1 kHz sinusoidal signals uses a common operational amplifier circuit and is...
This 800 Hz sinusoidal oscillator was found in a 1970s American documentation. The transistor...