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“The Persuader Deluxe” (K-980)
Schematic
.1µ
220K
1M
1KL
.1µ
Output
Input
Foot
Switch
(A)
Foot
Switch
(C)
2
1
3
7
8
9
4.7K
150K
+
-
9 VDC
Battery
DC Power
Jack
center (-)
4
5
V1
+
220µ
200K
1
2
3
6
7
8
V1
V1
.1µ
220K
680K
110K
.1µ
250KA
1
2
4
3
5
6
7
8
9
Plate1
Grid1
Cathode1
Heater CT
Plate2
Grid2
Cathode2
Heater2
Heater1
V1 (12AT7) BASING DIAGRAM
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MPSA13
NPN Darlington Transistor
B C
E
MPSA13
C
E
B
2M
220
+
25µ
2
3
1
BOOST
+
-
220 Ω
5
6
4
Foot
Switch
(B)
VOLUME
GAIN
Measurements taken with
12AT7 in V1
157mA
(DC)
9.1 VDC
2.4 VDC
1.6
VDC
6.9
VDC
0.6 VDC
0.5 VDC
4.8
VDC
0 VDC
-0.5
VDC
7.0 VDC
-0.4 VDC
= AC signal test points
NUMBERS
= DC test points
LETTERS
*70mV(AC)
AC voltage measurements are rough
approximations of open strumming with
Mexican strat set to full volume/ tone
with gain control at max setting
*70mVAC
0.6 VAC
Boost Engaged = 0.6 VAC
Boost Open = 0.1 VAC
Boost Engaged = 1.8 VAC
Boost Open = 0.6 VAC
Boost Engaged = 2.0 VAC
Boost Open = 1.3 VAC
1
2
3
4
5
A
B
C
D
E
F
G
G
0 VDC
H
I
J
K
L
1
2
3
A
B
C
3PDT
Footswitch
4
5
6
7
8
9
1
2
3
A
B
C
4
5
6
7
8
9
Bypass
Effect On
The solid lines represent electrical continuity
between footswitch terminals.