Beautiful, high quality Amplifier circuit. National Company of Used ruin his LM3876 Integrated with a few changes on the PCB LM2876, LM3886 Integrated NE5534 Used for Usable Tone Control Bass, Treble, Balance, Volume Controls have

Tone Control Features
20 Hz at 20 kHz.
+15 V, -15 V
2 x 13 mA.
(-0.2 DB):
0.01%.
92 dB.

Amplifier Features
– THD (20 Hz LM3886 amp circuit diagrams PCB drawings

part list

R1,R2 10 , TR 296
R3 75 , TR 296
R4 1,8 k, TR 296
R101, R201 1 k, TR 296
R102, R104,
R112, R202,
R204, R212, 6,8 k, TR 296
R103, R109,
R110, R203,
R209, R210 1 M, TR 296
R105, R113,
R205, R213 12 k, TR 296
R106, R107,
R206, R207 2,2 k, TR 296
R108, R208 18 k, TR 296
R111, R115,
R116, R211,
R215, R216 1 k, TR 296
R114, R214 56 , TR 296
R117, R118,
R217, R218 20 k, TR 296
R119, R219 33 k, TR 296
R120, R220 2,2 , TR 296
R121, R123,
R221, R223 22 , TR 296
P101/P102,
P201/P202,
P103/P203 22 k pot.
P104/P204 22 k pot.
P105, P205 10 k trimer
C1, C5 470 nF/35 V,
C2, C3, C4,
C6, C7, C8 4700 µF/35 V
C9, C13 470 µF/35 V
C10,C11,C14, C15,
C102, C104, C105,
C108, C109, C111,
C112, C120, C121,
C122, C202, C204,
C205, C208, C209,
C211, C212, C220,
C221, C222 100 nF/35 V,
C12, C16 220 µF/25V
C17 22 nF/35 V,
C101, C201 22 µF/25 V
C103, C113,
C203, C213 47 µF/25 V
C106, C206 2,2 nF/35 V,
C107, C207 1,5 nF/35 V,
C110, C210 150pF/35 V,
C114, C214 220pF/35 V,
C115, C117,
C118, C215,
C217, C218 10 µF/35 V, tantallium
C116,C216 50 pF/35 V,
C119,C219 100 µF/35 V

D1, D2 B250C4000
D5 LED
IO1 LM7815
IO2 LM7915
IO101, IO102,
IO201, IO202 NE5534
IO103, IO203 LM3876 (LM2876,
LM3886)

L101, L201 0,7 µH, 15 z, 1,2 mm
priemer 10 mm