This midrange filter for sound systems was found in the May 1988 issue of Radio Electronics magazine. The circuit is based on a dual amplifier that must be powered by a symmetrical source.
This circuit uses discharge tubes as active elements. The circuit is from a 1960s Signalite...
June 2016 – Mouser Electronics already have in stock the TPS56C215 converter from Texas...
This sensitive signal follower with an LM386 integrated circuit can be used in both audio and RF...