image/svg+xml
SVG Picture created as PreAmp3.svg date 2022/03/26 20:38:04
Preamp Schematic
Schematic of discrete op amp preamp
+15V
C10
100uF
C9
100uF
C8
100uF
C7
100uF
C5
220p
C6
220p
C4
0.1uF
C3
0.1uF
-15V
+15V
V-
4
V+
8
U3C
OPA2134
-15V
+15V
-24V
+24V
1
2
3
4
5
J6
Power In
R8
100
1
2
J7
Right Out
1
-
2
+
3
U3A
OPA2134
1
2
3
J4
Right Pot
R6
39.2
R4
10k
+24V
-24V
1
2
3
RV2
50k
+24V
1
2
J10
BYPASS
1
2
J9
BYPASS
TP1
TestPoint
C14
100uF
D6
1N4005
R14
330
+24V
11
12
14
21
22
24
A1
A2
K1
RT424024
1
2
J8
22VAC
R1
5.00k
R13
39k
R9
39k
D5
1N914
R12
15k
R11
39k
R10
15k
C11
47
C12
4.7
C13
100uF
OVL
1
OFS
2
RST
3
AC_OFF
4
GND
5
RLY
6
VCC_ON
7
VCC
8
U4
UPC1237HA
-24V
-15V
+24V
1
2
J5
Left Out
C1
220uF
1
2
3
J3
Left Pot
C2
220uF
R2
5.00k
1
2
3
RV1
50k
+
5
-
6
7
U3B
OPA2134
+
1
-
2
V+
3
GND
4
V-
5
6
U1
990C+
+
1
-
2
V+
3
GND
4
V-
5
6
U2
990C+
1
2
J1
Left In
1
2
J2
Right In
R5
39.2
R3
10k
+24V
-24V
R7
100