 Other one unit of graphic EQ. five bands. The basic difference with the
other circuits is, that I use instead of IC, transistor and the power supply, go up in +/-
24V DC, ensuring low distortion and bigger margins of overloading. With switch S1, we can
isolate the EQ. inside or except operation, leaving the musical signal to pass without no
alteration. |
|
| R1-4-37= 330Kohms | R34= 15Mohms | C12= 4.7nF 100V |
| R2-7= 2.2Kohms | R35-38= 220 ohms 1W | C13= 1.5nF 100V |
| R3= 120Kohms | R36= 100 ohms | C14= 470pF 100V |
| R5-6= 6.8Kohms | C1-3= 1uF 40V | C15= 68pF 100V |
| R8....12= 1.8Kohms | C2= 68pF 100V | C16-19= 100nF 100V |
| R13....15= 200Kohms | C4= 220uF 63V | C17-20= 470uF 40V |
| R16= 180Kohms | C5= 1uF 100V | C18= 4.7uF 63V |
| R17= 150Kohms | C6= 220nF 100V | RV1....5= 50Kohms Lin. |
| R18= 1.5Kohms | C7= 47nF 100V | Q1.....7= BC550C |
| R19....22= 1Kohms | C8= 15nF 100V | S1= 2X2 SW |
| R23....27= 220Kohms | C9= 5.6nF 100V | . |
| R28....32= 15Kohms | C10= 47nF 100V | . |
| R33= 10Kohms | C11= 15nF 100V | . |
