10-Band - Korektor Graficzny 01, SCHEMATY
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10 Band Graphic Equalizer
The circuit of graphic equalizer, allocates ten adjusting potesometer , that each one from them affects in a predetermined area of
frequencies, the central frequency of which abstains a octave (double), from the central frequencies of her neighbouring regions. Each
unit has common materials with remainder and it differs only in the capacity of capacitors that constitutes the filter in each unit. When the
runner of fader regulation RV1 until RV10, is in the middle then we do not have no intervention of filter above in the signal that passes
from in his and gain of particular unit, is one [ X1 ]. On the contrary if the runner is moved to a side of exit, the unit acts as filter of
cutting off of area and it degrades the signals of predetermined area of frequencies. On the contrary if it is moved to the side of entry, the
rung acts as filter of passage of area, strengthening the signals of predetermined area of frequencies. The quality of all materials should
be very good. Specifically potesometer RV1... the 10 and capacitors. If it is intended for stereo use then it will be supposed it is made in
two pieces with as much as possible suited the materials, between the channels, so that do not exist differences in the regulation of each
band frequencies. Switch S1 isolates the circuit EQ, when him we did not need and it ensures level [ flat ] response in the exit of circuit.
The circuit should be connected between preamplifier and in a final power amplifier.
Part List
R1....20= 10Kohms
C4= 10nF polyester
C18= 68pF polysterine
R21....40= 1Mohms
C5= 47nF polyester
C19= 360pF polysterine
R41= 10Kohms
C6= 4.7nF polyester
C20= 36pF polysterine
R42= 1Kohms
C7= 22nF polyester
C21= 4.7uF polyester
R43.....52= 2.2Kohms
C8= 2.2nF polyester
C22-23= 33pF polysterine
R53.....62= 47Kohms
C9= 12nF polyester
C24= 10uF 25V
R63-64-66-67= 47Kohms
C10= 1.2nF polyester
C25-26= 47uF 25V
R65= 10Kohms
C11= 5.6nF polyester
C27...32= 47nF polyester
R68-69= 47 ohms 1/2W
C12= 560pF polysterine
IC1...3=
TL074
RV1....10= 100Kohms lin FADER
C13= 2.7nF polyester
S1= 2X4 SW for stereo
RV11= 10Kohms log.
C14= 270pF polysterine
C1= 180nF polyester
C15= 1.5nF polyester
C2= 18nF polyester
C16= 150pF polysterine
C3= 100nF polyester
C17= 680pF polysterine
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