Big Thanks to Stephen for a lot of this info.Classic Compressor PCBClassic Compressor SchematicResistors
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 VersionParts ListR1 - 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
Opticomp Board - New VersionThis board (2.0) has a couple of traces wrong but the parts layout is correctParts ListR1 - 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
5 Knob Compressor Board -- Thanks to Stephen for all of these.
5 Knob Compressor SchematicLink to a larger version WARNING!!! Huge pic, but great detail.
Parts ListR1 - 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 VersionCompressor Schematic - Three Knob VersionParts 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 VersionOpti-Comp SchematicParts ListR1 - 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