Mod 101 Manual page 68

E
100K
328
1W
500p
VDC
INPUT
1
68K
68K
2
0 VDC
.022µ
1M
V1 3
2.4
VDC
.022µ
+
22µ
2A
SLO BLO
THROW
A
OFF
120VAC
POLE
60 HZ
A
BLACK
THROW
A
POWER
WHITE
ON
GREEN
100K
1W
1
320
250KA
VDC
0
2
68 VDC
TREBLE
VDC
6
.001µ
V2
1MA
1M
7
VOL
470 106
2.4
8
V1
250KA
VDC
VDC
BASS
22K
1M
V2
73 VDC
6.8K 7
.1µ
6
47
0.3 VDC
52.7 VAC
820
TR1
RED
1N4007
BLU
BLU/YEL
VIO
RED/YEL
BRN/YEL
1N4007
RED
BRN
YEL
BLK
YEL/BLK
BLK/RED
YEL
V4 V3
WHT/BLK
7 7
GRN
GRN/YEL
WHT
GRN
2 2
483 VDC
3
470 VDC
1.5K
276 VDC
4
470
-47
5
VDC
.1µ
8
V3
82K
220K
35 mVDC
1W
3 0 VAC
BIAS 1.2
D C
1.2
8
100K
220K
36 mVDC
1W -46 V4
.1µ 8
VDC
254 VDC 5
470
4
1.5K
-48 VDC
4.3 VDC -48 VDC 0 VAC 471 VDC
1N4007
47 VAC 0 VAC R(BIAS)
3
-4 VDC
487 VDC
25KL
0 VAC
2.7K
2.4K
22µ
+
521 VDC
2 VAC
STANDBY
HV
360
10W
POLE
THROW
POLE
THROW
B
+
B
220K
80µ
OFF
1W
THROW
POWER
B
ON
+
220K
80µ
1W
V2 V1
V1 = 12AX7 / ECC83
9 9
V2 = 12AT7 / ECC81
V3 = 6L6GC
V4 = 6L6GC
4 5 4 5
Indicated voltages were measured
with bias pot set to coldest setting
20K
TR2
BLU
A
YEL
IMPEDANCE
SELECTOR
GRN/YEL
BLU/YEL
RED BLK/YEL
B
B
GRN
BRN/YEL
BLK
C
BRN
482 VDC 468 VDC
0 VAC 0 VAC
D E
1K 4.7K
1W 1W
492 VDC
0 VAC
B C
478 VDC
0 VAC
5K
5W
+ + + +
22µ 22µ 22µ 22µ
1
5W
TR1 = 374BX
TR2 = 1650P
1
2
3
4
1
OUTPUT
2
3
4
1
2
3
4
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K-MOD101 Schematic (A)