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.

Components

Capacitors

Value	Count
150pF Ceramic	1
180pF Ceramic	1
470pF Ceramic	1
2.7nF	1
3.3nF	1
4.7nF	1
10nF	2
15nF	1
33nF	1
47nF	1
1uF E-lyte	3
10uF E-lyte	5
2.2uF E-lyte	1
220uF E-lyte	1

Resistors

Value	Count
47R	1
1K	2
3.3K	1
6.8K	2
10K	6
12K	1
20K	1
22K	1
33K	3
39K	4
47K	1
56K	2
68K	1
82K	1
100K	1
120K	1
180K	1
220K	2
470K	1

Potentiometers

Value	Count
10K Lin	1
100K Lin Trimpot	1
1M Rev log	1

Semiconductors

Value	Count
4558 Dual op-amp	1
MN3007 1024-Stage Low Noise BBD	1
CD4047 Monostable/Astable Multivibrator	1
LM358 Dual op-amp	1
1n914 Diode	2
2n5087 PNP Transistor	1
2n5088 NPN Transistor	2

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.

Link

Small Clone Chorus