Mod K-700, Instructions Manual, Page: 12 / 24

Bass to Tremolo Modification Schematic (STYLE-A)
Here is a schematic representation of this mod for style A amps. It is not necessary to be able to read the schematic in
order to complete the mod.
1
2
3
V2
1M
68K
68K
+
1.5K 25 µ
100K
100K
250p
.047 µ
.1 µ
10KA
MIDDLE
250KA
BASS
250KA
TREB
1MA
VOL
6
7
8
V2
+
820
5 µ
BRIGHT
120p
100K
220K
.022 µ
1MA
MSTR
.01
µ
2
1
NORMAL
TO V3
(PHASE
INVERTER)
1
2
3
V1
1M
68K
68K
+
1.5K
5 µ
100K
100K
500p
.047 µ
.1 µ
8.2K
250KA
BASS
250KA
TREB
1MA
VOL
6
7
8
V1
DEEP
100K
375 VDC
220K
2
1
BASS
.047
µ
1M
375 VDC
FENDER ® BASSMAN 100 PREAMP
(BEFORE MODIFICATION)
.047 µ
.0047
µ
1
2
3
V2
1M
68K
68K
+
1.5K 25
µ
100K
100K
250p
.047 µ
.1 µ
250KA
BASS
250KA
TREB
1MA
VOL
6
7
8
V2
+
1.5K
5
µ
BRIGHT
120p
100K
220K
.022 µ
1MA
MSTR
.01
µ
2
1
NORMAL
TO V3
(PHASE
INVERTER)
375 VDC
FENDER
®
BASSMAN 100 PREAMP
(AFTER MODIFICATION)
.047 µ
1
2
3
V1
+
2.7K
22 µ
220K
6
7
8
V1
+
100K 22 µ
8.2M
450 VDC
100K
.01
µ
1M
1M
3M-RA
SPEED
100K
.01
µ
.02 µ
FOOT
SWITCH
3M
TREM
FROM BIAS TAP
50K-RA
INTENSITY
.1 µ
470
-69 VDC
10KA
MIDDLE
12