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.
This circuit is from a 1968 Electronic Design. The components are from the era and the operating...
The idea of this circuit found in a Radio Electronics from January 1966. The idea of the...
The illustrated circuit uses the AUIRS2301 S from International Recfifier (www.irf.com) and is...