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PROJECT NAME
OCEANID
BASED ON
Cornish OC-1 Optical Compressor
EFFECT TYPE
Compressor
PROJECT SUMMARY
Pete Cornish's original optical compressor design features a clean blend and a complex side-chain for
envelope detection along with his legendary input buffer.
Actual size is 2.3" x 2.675" (main board) and 2.3" x 0.87" (bypass board).
OCEANID OPTICAL COMPRESSOR
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2019-11-15)
1
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Summary of Contents for Aion Electronics OCEANID
- Page 1 Pete Cornish’s original optical compressor design features a clean blend and a complex side-chain for envelope detection along with his legendary input buffer. Actual size is 2.3” x 2.675” (main board) and 2.3” x 0.87” (bypass board). OCEANID OPTICAL COMPRESSOR...
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Page 2: Table Of Contents
The Oceanid is a faithful reproduction of the OC-1 circuit, but with one major addition: an internal slide switch allowing the pedal to be used in true-bypass mode instead of buffered bypass. As with the Klon KTR, the buffered mode is “almost always better”, but with this feature, you can determine for yourself. -
Page 3: Parts List
Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W 100k Metal film resistor, 1/4W 100R Metal film resistor, 1/4W OCEANID OPTICAL COMPRESSOR... - Page 4 Film capacitor, 7.2 x 3mm 220pF MLCC capacitor, NP0/C0G 470n Film capacitor, 7.2 x 3mm 22uF Electrolytic capacitor, 5mm 100n Film capacitor, 7.2 x 2.5mm 2.2uF Electrolytic capacitor, 4mm 150pF MLCC capacitor, NP0/C0G 22uF Electrolytic capacitor, 5mm 4.7uF Electrolytic capacitor, 4mm OCEANID OPTICAL COMPRESSOR...
- Page 5 Switchcraft 111X or equivalent. 1/4" mono 1/4" phone jack, closed frame Switchcraft 111X or equivalent. 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. OCEANID OPTICAL COMPRESSOR...
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Page 6: Build Notes
BUILD NOTES Transistor selection The original OC-1 uses BC549C transistors. The pinout on the Oceanid PCB is for the U.S. “E-B-C” convention as used by the 2N3904 and 2N5088. The 2N5088 will operate identically to the BC549C, but if you do want to use the original type, just note that they will not follow the PCB outline. Typically they would need to be rotated 180 degrees, but check the datasheet for your brand as they do vary. -
Page 7: Schematic
BUFFER OUT SW1A IC1A IC2B FROM EFFECT OUT TL072P TL072P 220pF SW1B SW1D TO OUTPUT JACK 470pF 100kA VOLUME 470n IC2A TL072P IC3B 220pF LM358N IC3A LM358N IC1B IC4A IC4B LM358N 100k 100R TL072P LM358N 2N5088 150pF OCEANID OPTICAL COMPRESSOR... -
Page 8: Drill Template
INCH 0.625” 0.625” ø3/8” ø3/8” ø1/2” VOLUME COMPRESSION x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” BLEND x: 0, y: +0.66 ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.775 x: 0, y: -1.775 ø5/16” ø15/32” OCEANID OPTICAL COMPRESSOR... -
Page 9: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B OCEANID OPTICAL COMPRESSOR... -
Page 10: Wiring Diagram
WIRING DIAGRAM N.C. BUF FX GND +V +V JACK GND JACK GND BUF 125B OCEANID OPTICAL COMPRESSOR... -
Page 11: Document Revisions
(In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.0 (2019-11-15) Initial release. OCEANID OPTICAL COMPRESSOR...
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