We found this universal preamplifier circuit in a March 1994 Electronics Now. It has several types of equalization depending on the signal input.
This is a two-input audio switching circuit. The operational can be of any type and more entries can...
We found this amplifier for automotive use in the Philips integrated circuit manual from 1990. The...
Found in old English documentation this circuit can be made with a BF245 or equivalent. Coils are...