Found in an Electronic Design from the 90s, this circuit uses components from the time. It is intended for coupling with 50-ohm cables.
This circuit has two response curves that depend on the position of the tone control switch. The...
This circuit is from a 1977 Signetics manual. BC107 transistors can be replaced with BC547 and...
This circuit is from a Popular Electronics from 1992. The circuit employs an equivalent transistor and...