This circuit is based on the TDA3810N. We found it in the March 1992 issue of Radio Electronics magazine. The circuit consists of an audio processor capable of working with two audio channels.
This old oscillator using germanium transistors has a high impedance headphone as inductor to...
This old fashioned amplifier can source some watts to a low impedance loudspeaker. The circuit...
This 50 Hz rejector or notch filter was found in a 1975 documentation. Other frequencies can be...