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TUBE VOLTAGE CHART
1
2
3
4
5
V1
121
0
2
HTR
HTR
V2
65
0
0.8
HTR
HTR
V3
75
0
1.2
HTR
HTR
V4
256
56
90
HTR
HTR
V5
273
75
86
HTR
HTR
V6
226
0
6.2
HTR
HTR
V7
122
0
1.1
HTR
HTR
V8
241
49
82
HTR
HTR
V9
-15.3
-15.3
3.3
HTR
HTR
V10
-15.3
-15.3
3.3
HTR
HTR
Voltages measured with Fluke 87 DMM referenced to chassis. All controls set to max
CCW. V4 phase shift oscillator was disabled by shorting out the 820K resistor.
V4 – 12DW7
V5 – 12AU7
Vibrato Oscillator
Vibrato Modulator
V5
V4
V1
V1 – 12AX7
st
Ch 1 1
Preamp
NOTES AND EXTRAS
6
7
8
9
72
0
0.9
HTR
84
-1.0
0
HTR
75
0
1.6
HTR
104
-0.5
0
HTR
266
70
95
HTR
226
0
6.2
HTR
211
0
2
HTR
85
0
4
HTR
405
404
X
405
405
404
X
405
TUBE LOCATOR
V6 – 12AU7
V7 – 12AX7
Reverb Driver
Reverb Recovery
Phase Inverter
S2 SPEAKER
V7
V8
V6
V3
V2
V2 – 12AX7
V3 – 12AX7
st
nd
Ch 2 1
Preamp
Ch 1 & 2 2
Preamp
MODEL M-10A
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
V8 – 12AU7
V10 – 7189A
Power Output
S1 POWER
V10
V9
T2
V9 – 7189A
Power Output
1
5
9
2
6 10
3
7 11
4
8 12
P1-S1 KEY
VARISTOR
Pot codes: 304-6532
Mfg is Stackpole
Date is 32th week of 1965
AC POWER
FUSE
T1
LYTIC
PS CHASSIS
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