Stereo Tone Control With Loudness And Filter

[guclusat]

Stereo tone control with loudness and filter circuit diagram



Part list :
R1 = 100K
R2 = 50K trim
R3 = 22K
R4 = 15K
R5 = 1K
R6 = 4K7
R7 = 330K
R8 = 330K
R9 = 3K3
R10= 5K6
R11= 8K2
R12= 5K6
R13= 1K
R14= 1K
R15= 50K TRIM
R16= 50K TRIM
R17= 330K
R18= 4K7
R19= 47K
R20= 1K
R21= 4K7
R22= 2K2
R23= 100R
R24= 22K
C1 = 15n
C2 = 15n
C3 = 560p
C4 = 4u7
C5 = 33u
C6 = 4n7
C7 = 39n
C8 = 39n
C9 = 4u7
C10=4u7
C11=470u
C12=100u
Q1 = C1815
Q2 = C828
D1 = Green Led

 

[guclusat]

Automatic-Loudness-Control

Parts:
P1 10K Linear Potentiometer (Dual-gang for stereo)
R1,R6,R8 100K 1/4W Resistors
R2 27K 1/4W Resistor
R3,R5 1K 1/4W Resistors
R4 1M 1/4W Resistor
R7 20K 1/2W Trimmer Cermet
C1 100nF 63V Polyester Capacitor
C2 47nF 63V Polyester Capacitor
C3 470nF 63V Polyester Capacitor
C4 15nF 63V Polyester Capacitor
C5,C9 1µF 63V Electrolytic or Polyester Capacitors
C6,C8 47µF 63V Electrolytic Capacitors
C7 100pF 63V Ceramic Capacitor
IC1 TL072 Dual BIFET Op-Amp
SW1 DPDT Switch (four poles for stereo)