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“The Tea Philter” (K-970)
Schematic
22µ
50KA
.1µ
Output
Input
Foot
Switch
(A)
Foot
Switch
(B)
2
3
1
6
5
4
+
+
-
9 VDC
Battery
DC Power
Jack
center (-)
10K
1M
MPSA13
NPN Darlington Transistor
B
C
E
MSPA13
C
E
B
1M
10K
.0047µ
.1µ
1M
1M
DPDT Foot Switch
2
3
1
6
5
4
680p
1M
SWEEP
9.11 VDC
0.23 mADC
6.73
VDC
3.24
VDC
2.33
VDC
1
2
3
4
PWR
C
B
E
0.15
VAC
0.15
VAC
0.16
VAC
5
0.16
VAC
60 mVAC @ Max (Clockwise)
16 mVAC @ Mid (12:00)
0 mVAC @ Min (Counter-clockwise)
DC Voltages measured with respect to ground.
AC Voltages measured with 50KA sweep pot set to half-way
(12:00), except for test point 3.
AC voltages measured while strumming an open E chord on a strat with single coil neck pickup
(volume and tone turned all the up).
Letter test points are for DC
Numbered test points are for AC
