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PostPosted: Wed Aug 08, 2007 6:48 am 
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Posts: 1075
Location: North Carolina
Big Thanks to Stephen for a lot of this info.

Classic Compressor PCB
Image
Image

Classic Compressor Schematic
Image

Resistors
R1 – 470K
R2 – 10K
R3 – 470K
R4 – 470K
R5 – 10K
R6 – 10K
R7 – 1M
R8 – 220K
R9 – 220K
R10 – 1M
R11 – 15K
R12 – 150K
R13 – 10K
R14 – 10K
R15 – 1M
R16 – 1M
R17 – 150K
R18 – 27K
R19 – 10K
R20 – 56K
R21 – 27K
R22 – 4.7K (LED)

Pots
VR1 – A100K (Level)
VR2 – B500K (Sustain)
VR3 – 2K Trim Pot

Semi-conductors
D1&2 – 1N4148
D3 - LED

Q1 thru 5 – 2N5088 or similar

IC1 – CA3080E

Capacitors
C1 – 220pf
C2 - .01uf
C3 – 1uf Electrolytic
C4 – 1uf Electrolytic
C5 – 1uf Electrolytic
C6 – 1uf Electrolytic
C7 - .01uf
C8 – 1uf Electrolytic
C9 - .001uf
C10 - .01uf
C11 - .01uf
C12 – 10uf Electrolytic
C13 - .047uf
C14 – 10uf Electrolytic (shown as 1uf on PCB)
C15 – 100uf
C16 – .01uf (Not shown on schematic. Part of power supply filtration)

Current draw – 5ma

5-knob Compressor - New Version

Image

Parts List
R1 - 4.7K LED
R2 - 10K
R3 - 10K
R4 - 56K
R5 - 27K
R6 - Not on schematic
R7 - 470k
R8 - 10K
R9 - 470K
R10 - 470K
R11 - 10K
R12 - 10K
R13 - 1M
R14 - 1M
R15 - 220K
R16 - 220K
R17 - 150K
R18 - 150K
R19 - 10K
R20 - 10K
R21 - 1M
R22 - 1M
R23 - 47K
R24 - 27K
R25 - 470K
R26 - 56K
R27 - 1K
R28 - 10K
R29 - 27K (listed as 10k on schematic)
R30 - 10K
R31 - 10K
R32 - 10K
R33 - 56K
R34 - 470K
R35 - 10K
R36 - 1K
R37 - 7.5K

VR1 - A100K Tone
VR2 - C250K Attack
VR3 - B500K Sustain
VR4 - B10K Blend
VR5 - A100K Level
VR6 - 2K Trimmer

Q1 - Q7 - 2N5088 (EBC)

D1 - 1N4001
D2 - Not on schematic
D3 & D4 - 1N4148 OR 1N914

IC1 - BA6110

C1 - 220uf Electrolytic (power filter listed as 100uf)
C2 - 10uf Electrolytic
C3 - 1uf Electrolytic (listed as 10uf on schematic)
C4 - 10uf Electrolytic
C5 - Not on Schematic
C6 - 220pf
C7 - .033uf
C8 - 1uf Electrolytic
C9 - 1uf Electrolytic
C10 - .1uf
C11 - 1uf Electrolytic
C12 - .01uf
C13 - 1uf Electrolytic
C14 - .001uf
C15 - .001uf
C16 - .01uf
C17 - .01uf
C18 - 0.1uf
C19 - 0.1uf
C20 - 0.1uf
C21 - 0.1uf
C22 - 0.1uf

Current Draw: 4ma

Image


Opticomp Board - New Version

Image
This board (2.0) has a couple of traces wrong but the parts layout is correct

Parts List
R1 - 1M
R2 - 10k
R3 - 470k
R4 - 1M
R5 - 10k
R6 - 100k
R7 - 100k
R8 - 220k
R9 - 220k
R10 - 4.7k
R11 - 100k
R12 - 100k
R13 - 4.7k

VR1 - B500K (Sustain)
VR2 - A100K (Volume)

Q1 & 2 - 2N5088

D1 - 1N4001

IC1 - RC4558 (or other dual op-amp)

Optocoupler - VTL5C4/2

C1 - .01uf (10n) [.1uf (100n) for Bass]
C2 - .047uf (47n) [.1uf (100n) for Bass]
C3 - .047uf (47n) [.1uf (100n) for Bass]
C4 - .047uf (47n)
C5 - .047uf (47n)
C6 - 33uf
C7 - 100uf
C8 - 33uf

Current Draw: 5.5ma

Image

5 Knob Compressor Board -- Thanks to Stephen for all of these.

Image

5 Knob Compressor Schematic
Image

Link to a larger version WARNING!!! Huge pic, but great detail.

Parts List

R1 - 4.7K LED
R2 - 10K
R3 - 10K
R4 - 56K
R5 - 27K
R6 - 2.2K
R7 - 2.2M
R8 - 10K
R9 - 470K
R10 - 470K
R11 - 10K
R12 - 10K
R13 - 1M
R14 - 1M
R15 - 220K
R16 - 220K
R17 - 150K
R18 - 150K
R19 - 10K
R20 - 10K
R21 - 1M
R22 - 1M
R23 - 47K
R24 - 27K
R25 - 470K
R26 - 47K
R27 - 1K
R28 - 10K
R29 - 10K
R30 - 10K
R31 - 10K
R32 - 10K
R33 - 47K
R34 - 470K
R35 - 10K
R36 - 1K
R37 - 7.5K

VR1 - A100K Tone
VR2 - C250K Attack
VR3 - B500K Sustain
VR4 - B10K Blend
VR5 - A100K Level
VR6 - 2K Trimmer

Q1 - Q7 - 2N5088 (EBC) OR 2SC1849 (ECB)

D1 - 1N4001
D2 - 5.1V Zener
D3 & D4 - 1N4148 OR 1N914

IC1 - CA3080
IC2 - BA6110 Do NOT use both ICs at the same time!

C1 - 100uf Electrolytic
C2 - 1uf Tantalum
C3 - 10uf Electrolytic
C4 - 10uf Electrolytic
C5 - 220pf
C6 - .01uf
C7 - 1uf Tantalum
C8 - 1uf Tantalum
C9 - 0.1uf
C10 - 1uf Tantalum
C11 - .01uf
C12 - 1uf Tantalum
C13 - .001uf
C14 - .001uf
C15 - .01uf
C16 - 10uf Electrolytic
C17 - .01uf
C18 - 0.1uf
C19 - 0.1uf
C20 - 0.1uf
C21 - 0.1uf
C22 - 0.1uf

[hr]

Compressor Board - Three Knob Version

Image
Compressor Schematic - Three Knob Version

Image

Parts List

R1 -4.7M
R2 - 10K
R3 - 10K
R4 - 1M
R5 - 1M
R6 - 15K
R7 - 150K
R8 - 10K
R9 - 10K
R10 - 1M
R11 - 47K
R12 - 27K
R13 - 1M
R14 - 10K
R15 - 56K
R16 - 27K
R17 - 4.7K LED

VR1 - 2K Trim
VR2 - B500K Sustain
VR3 - A50K Level
VR4 - C250K Attack

Q1 to Q5 - 2N5088
D1 to D3 - 1N914
IC1 - CA3080e

C1 - .01uf
C2 - 1uf Electrolytic
C3 - .01uf
C4 - 1uf Electrolytic
C5 - .001uf
C6 - .01uf
C7 - .01uf
C8 - 10uf Electrolytic
C9 - .01uf
C10 - .05uf
C11 - 10uf Electrolytic
C12 - 1uf Electrolytic

Dyna Parts
Ra - 1M
Rb - Jumper
Rc - Jumper
Rd - Jumper
Re - 470K
Ca - Omit
Cb - Omit
Cc - Omit
Cd - Omit

Ross Parts
Ra - 470K
Rb - 470K
Rc - 10K
Rd - 220K
Re - 220K
Ca - 1uf Electrolytic
Cb - 1uf Electrolytic
Cc - 1uf Electrolytic
Cd - 100pf

Opti-Comp PCB - Old Version

Image

Opti-Comp Schematic

Image

Parts List

R1 - 2.2M
R2 - 10K
R3 - 470K
R4 - 1M
R5 - 10K
R6 - 100K
R7 - 100K
R8 - 220K
R9 - 100K
R10 - 4.7K
R11 - 4.7K LED
R12 - 47R
R13 - 100K
R14 - 220K

VR1 - B500K (Compression)
VR2 - A100K (Level)

Q1 & 2 - 2N5088

D1 - 1N4001

IC1 - RC4558 (or other dual op-amp)

C1 - .01uf
C2 - .047uf
C3 - .047uf
C4 - .047uf
C5 - .047uf
C6 - 33uf Elctrolytic
C7 - 220uf Electrolytic
C8 - 33uf Electrolytic

Current Draw: 5.45ma


Last edited by coolhand on Mon Sep 24, 2007 10:00 am, edited 5 times in total.

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 Post subject:
PostPosted: Wed Aug 08, 2007 7:13 am 
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Joined: Wed Apr 18, 2007 8:50 am
Posts: 1075
Location: North Carolina
Here are the instructions for the Classic Compressor

Classic Compressor Instructions

Here are the instructions for the newest 5-knob version of the Compressor.

Compressor Instructions

Here are the instructions for the new Optical Compressor (top mounted jacks).

OptiComp Instructions

Here are the instructions for the older Optical Compressor (side mounted jacks).

Older OptiComp Instructions

Good Luck


Last edited by coolhand on Thu Sep 20, 2007 7:55 am, edited 1 time in total.

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PostPosted: Mon Mar 30, 2009 8:19 pm 
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Joined: Wed Apr 18, 2007 8:50 am
Posts: 1075
Location: North Carolina
Thought this might be helpful and easier to find in this sticked thread:

5-knob signal path. To be followed with a signal tester.

byoc wrote:
We'll just go over the semi conductor test spots rather than break down every single eyelet along the signal path. When you find the dead spot, then we know which area we need to go through with a fine tooth comb.

Dry signal: IN eyelet > base Q1 > base Q6 > base Q7 > OUT eyelet

Compressed signal: IN eyelet > base Q1 > pin 6 CA3080 or pin 8 BA6110 > base Q2 > base Q3 > base Q4 > base Q5 > base Q7 > OUT eyelet

_________________
Math illiteracy affects seven out of every five people.

I can't get enough minimalism.


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PostPosted: Fri Sep 02, 2011 1:48 pm 
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Joined: Wed Apr 18, 2007 8:50 am
Posts: 1075
Location: North Carolina
A couple of sets of working 5 knob transistor voltages. Readings will vary. These are just rough guidelines to check your voltages.

#1
Power Supply = 9.02V

Q1
E = 2.1V
B = 2.5V
C = 6.9V

Q2
E = 3.9V
B = 4.5V
C = 5.1V

Q3
E = 0V
B = 0V
C = 8.9V

Q4
E = 0V
B = 0V
C = 8.9V

Q5
E = 8.5V
B = 8.9V
C = 9V

Q6
E = .35V
B = .92V
C = 5.5V

Q7
E = .34V
B = .92V
C = 5.6V


#2

Power Supply = 8.91V

Q1
E = 1.86V
B = 2.27V
C = 6.42V

Q2
E = 3.49V
B = 4.09V
C = 4.82V

Q3
E = 0V
B = 0V
C = 8.30V

Q4
E = 0V
B = 0V
C = 8.30V

Q5
E = 7.76V
B = 8.23V
C = 8.29V

Q6
E = 0.38V
B = 0.98V
C = 4.34V

Q7
E = 0.39V
B = 0.99V
C = 4.30V

_________________
Math illiteracy affects seven out of every five people.

I can't get enough minimalism.


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