D
E
47K
4.7M
470
Ω
WW
100K
V1-B
High Gain
Input
220K
2.7K
6
7
8
1
2
3
V1-A
Low Gain
Input
CHANNEL 1
47K
33pF
220K
.047
330K
47K
1M
Bass
470pF
120K
.0047
.0047
1M
Treble
470pF
1M
Volume
470K
.01
68K
.022
470K
100K
330K
330K
.047
47K
100pF
1
2
3
1.5K
470K
C
Tone
Boost
Bright
Mellow
D
E
47K
4.7M
470
Ω
WW
100K
V2-A
High Gain
Input
120K
1
2
3
6
7
8
V2-B
Low Gain
Input
CHANNEL 2
47K
33pF
220K
.047
330K
47K
1M
Bass
470pF
120K
.0047
.0047
1M
Treble
470pF
1M
Volume
22M
.01
470K
.01
68K
.022
470K
100K
330K
330K
.047
47K
100pF
6
7
8
2.7K
270K
C
Tone
Boost
Bright
Mellow
V1
12AX7 or 7025
V2
12AX7 or 7025
STEREO
INPUT
22K
A
47K
B
C
D
F
1
2
3
6
7
8
2.2M
100K
100K
.047
.047
.0022
47K
H
1
2
3
100K
100K
.047
.047
.0022
270Ω
22K
E
G
820pF
1M
7
6
8
5K
10W
B
1
µF 450V
Reverb
Spring
Assembly
270K
E
.047
1
2
3
47K
2.
7
K
Reverb
Footswitch
1M
Rever
b
6
7
8
2.7K
15K
270K
C
To
Power Amp
1
2
3
47K
47K
B
D
D
I
J
Vibrato
Footswitch
6
7
8
270K
B
1M
Vibrato
Intensity
500k
Vibrato
Speed
220K
820K
3.3M
5%
.01
.01
.02
.068
47K
330K
330K
.047
8.2M
1M
.0047
.0047
V4
12DW7/7247
.1
.1
820pF
MUSICAL INSTRUMENT AMPLIFIER
MODEL M-10A
66-3121
1
5
9
2
6 10
3
7 11
4
8 12
P1-S1 KEY
VARISTOR
V5
12AU7
V6
12AU7
V7
12AX7
T1
LYTIC
PS CHASSIS
AC POWER
FUSE
V3A
½ 12AX7
V3B
½ 12AX7
To
Power Amp
Modified to run both preamps through the effects circuits.
Just install a jumper from V3 pin 1 to V3 pin 6. See minor
change on Power Amp page also.
CONE BOARD
WIRE COLOR CHART
A
RED YELLOW YELLOW
B
WHITE RED RED
C
WHITE YELLOW
D
BLACK
E
WHITE ORANGE
F
WHITE GREEN
G
WHITE GREY
H
WHITE VIOLET
I
WHITE BLUE
J
WHITE BROWN
121
0
2
72
0
.9
65
0
.8
84
0
-1
75
0
1.6
75
0
1.2
104
0
-.5
256
90
56
86
273
266
95
70
226
6.2
0
122
0
1.1
211
0
2
V4
V5
V1
V2
V6
V3
V7
V8
V9
V10
S2 SPEAKER
S1 POWER
T2
V10 – 7189A
Power Output
V9 – 7189A
Power Output
V8 – 12AU7
Phase Inverter
V2 – 12AX7
Ch 2 1
st
Preamp
V3 – 12AX7
Ch 1 & 2 2
nd
Preamp
V1 – 12AX7
Ch 1 1
st
Preamp
V7 – 12AX7
Reverb Recovery
V6 – 12AU7
Reverb Driver
V4 – 12DW7
Vibrato Oscillator
V5 – 12AU7
Vibrato Modulator
