We found this circuit in a 1965 publication by General Electric. The zener is 8.2 V x 1 W and the table shows the capacitor values according to the number of cylinders in the vehicle.
This circuit generates signals of various frequencies and waveforms, making it useful on the...
We found this circuit in an old publication dealing with operational amplifiers. The circuit uses...
This filter for the scratching noise common in record players was found in Radio Electronics from the...