The EQ-2 it is a circuit of graphic equalizer 6 band of regulation. Each band is regulated from the potesometers RV1-6, that are, for better optical indicate of regulations, Fader. This does not mean that we cannot him replace with simply potesometer. In the center of regulation potesometer, the gain is null (flat), but in terminal has +/- 15 db, boost or cutting off, respectively. For stereo operation, it will be supposed two times.
R1=47Kohms / C2=15nF 100V / C9=680nF 100V
R2-5-18=150Kohms / C3=150nF 100V / C10=150nF 100V
R3-4=10Kohms / C4=33nF 100V / C11=39nF 100V
R6....17=10Kohms / C5=8.2nF 100V / C12=8.2nF 100V
R19=100Kohms / C6=1nF 100V / C13=2.2nF 100V
RV1.....6=100Kohms Lin. / C7=470pF 100V / C14=470nF 100V
C1=1uF 100V / C8=680nF 100V / IC1-2=TL074