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Small Clone Chorus

Small Clone Chorus

This is a layout for the Small Clone chorus. The layout is based on Tonepads layout but squeezes it slightly to make it easier to fit it in a 1590B enclosure.

This chorus sounds wonderful, and apart from getting hold of an MN3007, which requires some work and might score you a fake one, it uses only fairly standard components. Certainly not anything that should be hard to find.

Layout

Image is 300 dpi.
Image

Components

Capacitors

ValueCount
150pF Ceramic1
180pF Ceramic1
470pF Ceramic1
2.7nF1
3.3nF1
4.7nF1
10nF2
15nF1
33nF1
47nF1
1uF E-lyte3
10uF E-lyte5
2.2uF E-lyte1
220uF E-lyte1

Resistors

ValueCount
47R1
1K2
3.3K1
6.8K2
10K6
12K1
20K1
22K1
33K3
39K4
47K1
56K2
68K1
82K1
100K1
120K1
180K1
220K2
470K1

Potentiometers

ValueCount
10K Lin1
100K Lin Trimpot1
1M Rev log1

Semiconductors

ValueCount
4558 Dual op-amp1
MN3007 1024-Stage Low Noise BBD1
CD4047 Monostable/Astable Multivibrator1
LM358 Dual op-amp1
1n914 Diode2
2n5087 PNP Transistor1
2n5088 NPN Transistor2


Working voltages

Debug help, this is values taken from a working Small Clone. "fl" after the reading means the value fluctuates, and that it should. Link

Q1
2N3906
C   0.00   
B   2.57
E   3.22

Q2 (Bottom 2N5088)
2N5088
C  8.80
B  3.58
E  3.01

Q3 (Top 2N5088)
2N5088
C  8.80
B  8.77
E  8.13

MN3007
1  8.13
2  4.04
3  3.78
4  0.00
5  0.00
6  4.03
7  3.67
8  3.67

CD4047
1  7.91-7.97  fl
2  0.10-0.13  fl
3  6.64-6.86  fl
4  8.13  
5  8.13 
6  8.13
7  0.00
8  0.00
9  0.00
10  4.03
11  4.03
12  0.00
13  7.93-7.98  fl
14  8.13

Top op-amp 358N
1  0.94-2.24  fl
2  3.58
3  3.55
4  0.00
5  1.16-2.98  fl
6  1.95
7  0.03-7.52  fl
8  8.80

Bottom op-amp TL072
1  4.40
2  4.40
3  4.29
4  0.00
5  4.39
6  4.40
7  4.41
8  8.80


Gut Shot

This is from my build of this effect.
Image

Small Clone Chorus

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