Mod 101 - Page 68

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