This circuit was obtained in a 1970 engineering documentation. The operational is the 741, but other operational ones can be used. The power supply must be symmetrical.
This is an amplifier for recorder and return containing preamplifier and power amplifier with...
The signal from this circuit found in a 1968 Electronics World is sinusoidal and depends on the...
This filter for scratched disc noise was found in an English documentation from 1989. The...