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EQ 3

2017-12-22 06:40  
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5 Band Graphic Equalizer

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  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.

Part List

R1-4-37= 330KohmsR34= 15MohmsC12= 4.7nF 100V
R2-7= 2.2KohmsR35-38= 220 ohms 1WC13= 1.5nF 100V
R3= 120KohmsR36= 100 ohmsC14= 470pF 100V
R5-6= 6.8KohmsC1-3= 1uF 40VC15= 68pF 100V
R8....12= 1.8KohmsC2= 68pF 100VC16-19= 100nF 100V
R13....15= 200KohmsC4= 220uF 63VC17-20= 470uF 40V
R16= 180KohmsC5= 1uF 100VC18= 4.7uF 63V
R17= 150KohmsC6= 220nF 100VRV1....5= 50Kohms Lin.
R18= 1.5KohmsC7= 47nF 100VQ1.....7=BC550C
R19....22= 1KohmsC8= 15nF 100VS1= 2X2 SW
R23....27= 220KohmsC9= 5.6nF 100V.
R28....32= 15KohmsC10= 47nF 100V.
R33= 10KohmsC11= 15nF 100V.

 

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