This simple tone control using two transistors was found in an Electronics Today International of the 90s. Transistors are general purpose NPN types, like the BC549 for greater gain.
November 2016 - The On Semiconductor Reference Development Kit and WDK1.0GEVK Reference Kit can...
We find this circuit in an American 80's documentation. No further information about the...
The circuit shown in the figure is in fact an excellent symmetrical switching source capable of...