Download - EH Small Stone
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7/23/2019 EH Small Stone
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6IC57
45
1M100 47k 33uF
4k7
15k
1k
1k8.1
27kON
22k+V
+V
.1
3
26
IC17
4
5
2k
.0068
30k
1k
Vbias
27k
47k
3
26
IC27
4
5
2k
.0068
27k
1k
Vbias
27k
47k
3
26
IC47
4
5
2k
.0068
27k
1k
Vbias
27k10k
47k
3
26
IC37
4
5
2k
.0068
27k
1k
Vbias
27k10k
47k
270k
4k7
ON
3k3
27k
10k 10k
+V
+
9vAC
ADAPTOR
INPUT
100k
10k
.0068
4k7
470k
Vbias
4k7
10k
15k
33uF
Vbias
10uFOUTPUT
.1
470k
27k
30k
470
+V
LFO
LFO
2k
This circuit works like a Small Stone. It uses the CA3080 OTA instead of the obsolete CA3094. Whentrue bypass is used, theres a volume drop when effect is on. Off board components except for thepotentiometers are not shown on the layout. Small Stone is a registered trademark owned by EH.
PiedritaRev.6.Nov.28.2004
+V
7k5
27k
1M R21
F
P
2003
F
P
3
PIEDRITA
P
I
E
D
R
I
T
A
IC1
I
C
IC
2
I
IC3
I
C
3
IC4
I
C
4
IC5
I
C
5
Q11 Q22
Q33
Q44
Q55
Q66
Q77
Q88
Q99
Q1 010
Q1 111
Q1 212
Q1 313
Q1414
INNGNDND
OUTUT
+9V9V
-
+ O
+V
-V
10k
R33
27k
R32
27k R28
1kR
29
10k
R1
1
k
R40
4k7
R12
3k3
R11
27k
R34
1k
R36
10k R31
470k R5
27k
R10
27k R30
1k
R27
27k
R13
10k R6
30k R25
-
+ O
+V
-V
4k7 R7
470k R14
4k7 R15
4k7 R42
30k R8
27k R38
27k R37
10k R39
27k
R41
1k8
R20
15k R17
22k
R16
1k R187k5
R23
27K
R22
-
+O
+V
-V
-
+O
+V
-V
C7
+33uFC1 C5
C8
+
33uFC12
C9
270k
R9
-
+ O
+V
-V
C2
+
10uFC3
27k
R19
100k
R4
15k R3
100 R24
C4
470
R2
2KR
X
47k
2k
47k
47k
47k
2k
2k
2k
47k
10k
R35
C6
C10
+
47uFCb
Ca
47uF
.1
Layoutandpresentation
byFranciscoPea2001-200
.
Allrightsreserved.
Autho
rizationforpersonaluseonly,
anycommercialuseisfo
rbidden.
Permissionforposting/servinglimitedto
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Q11
Q2
Q12
Q3
Q13
Q4
Q14
Q5Q6
Q7Q8
Q9Q10
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7/23/2019 EH Small Stone
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C6
3
26
IC17
4
5
2k
C4
R25
R27
Vbias
R30
47k
3
26
IC27
4
5
2k
C5
R28
R29
Vbias
R32
47k
3
26
IC47
4
5
2k
C8
R37
R36
Vbias
R34R35
47k
3
26
IC37
4
5
2k
C9
R41
R40
Vbias
R38R39
47k
R9
3
2
6IC57
45
R21R24 47k C12
R15
R12
R17
R18
R20C10
R19
ON
ON
R11
R16
R10
R31 R33
+V
+V
+V
+
9vAC
ADAPTOR
INPUT
R4
R6
C2
R7
R5
Vbias
R42
R1
R3
C1 Cb
Vbias
C3OUTPUT
C7
R14
R13
R8
R2
+V
LFO
LFO
2k
+V
R23
R22
ResistorsR1 - 10kR2 - 470ohmR3 - 15kR4 - 100kR5 - 470kR6 - 10k
R7 - 4k7R8 - 30kR9 - 270kR10 - 27kR11 - 3k3R12 - 4k7R13 - 27kR14 - 470kR15 - 4k7R16 - 22kR17 - 15kR18 - 1kR19 - 27kR20 - 1k8R21 - 1M potR22 - 27kR23 - 7k5R24 - 100R25 - 30k
R26 -R27 - 1kR28 - 27kR29 - 1kR30 - 27kR31 - 10kR32 - 27k
R33 - 10kR34 - 27kR35 - 10kR36 - 1kR37 - 27kR38 - 27kR39 - 10kR40 - 1kR41 - 27kR42 - 4k7
RX5 - 2k
RY5 - 47k
CapacitorsC1 - 33 FC2 - 0.0068 FC3 - 10 FC4 - 0.0068 FC5 - 0.0068 FC6 - 0.1 F
C7 - 0.1 FC8 - 0.0068 FC9 - 0.0068 FC10 - 0.1 FC11 -C12 - 33 FCa - 0.1 FCb - 47 F
TransistorsQ1 - 2N5088
2
ICs5 - CA3080
Q - 2N5087Q3 - 2N5088Q4 - 2N5088Q5 - 2N5088Q6 - 2N5088
Q7 - 2N5088Q8 - 2N5088Q9 - 2N5088Q10 - 2N5088Q11 - 2N5087Q12 - 2N5087Q13 - 2N5088Q14 - 2N5088
Parts List
Q11 Q22
Q33
Q44
Q55
Q66
Q77
Q88
Q99
Q1 010
Q1 111
Q1 212
Q1 313
Q1 414
INN GNDND
OUTUT
+9V9V
RA TEA TE
+ C1C
+
C1212
+
C33
R11
R
R
10
R
R33
R
3
3
R32
R
3
2
R2 828
R2
9
R
2
9
R1R
R12
R
2
R36
R
3
6
R3 131
R55
R3030
R27
R
2
7
R13
R
3
R66
R2 525
R77
R1 414
R1515
R4242
R88
R23
R
2
3
R22
R
2
2
C77
C5C
5
C22
C4C
4
R2R
2
RXR
X
IC1
I
C
IC
2
I
IC5
I
C
5
R34
R
3
4
R40
R
4
R3838
R3737
R3939
R
41
R
4
R20
R
2
R1 717
R16
R
6
R1 818
C8C
8
C9C
9
R9R
9
R19
R
9
R4R
4
R33
R2 424
R35
R
3
5
C6C
6
C10
C
IC3
I
C
3
+
Cbb
IC4
I
C
4
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Q1
Q11
Q2
Q12
Q3
Q13
Q4
Q14
Q5Q6
Q7Q8
Q9Q10