Tube EQ, which I call "Uniia".

Just because I really wanted a tube EQ. This is the implementation of the EQ from Audio magazine circa 1955 (I do not have the original; the information was found on the internet). Schematic from the article: Which is hard to implement, not having proper potentiometers. Also, it seems like there is a mistake on the schematic, as if you move the TREBLE Q potentiometer fully to the right, there will be no signal coming out of your EQ. It could be that another 270 kOhm resistor was... Read more