In addition to tone control, this circuit of the SGS 1982 linear integrated circuit manual has a loudness control. The supply must be made with a 24V voltage source.
The circuit presented was found in the 1994 Linear Applications Handbook from National...
This circuit, which in our times would be called a shield, can also be used with other loads. The...
This circuit is intended for amplification of signals in the range of 1.8 to 20 MHz. The...