The LM121 integrated circuit is no longer common in our market, with more modern equivalent versions. The circuit is from the 1994 Linear Applications Handbook by National Semiconductor.
January 2017 - Bourns' 100 mm motorized sliding pots can now be purchased from Mouser Electronics....
This circuit for several frequencies was obtained in an American documentation from the 90s. The...
This tone control was obtained in the Audio Handbook of the National Semiconductor of 1977. The...