This circuit was found in documentation from the 90s. The operational amplifier admits an equivalent. The circuit has frequency ranges up to 5kHz determined by R1.
This Baqxandall tone control can be used with any low Power audio stage as the input of a audio...
This circuit can be seen in several publications of the same time. The circuit is an application note...
The power supply for this circuit found in a QST magazine is given in the previous circuit. The...