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PROJECT NAME
AZURE
BASED ON
®
BOSS
CE-2 Chorus
EFFECT TYPE
Analog chorus
PROJECT SUMMARY
One of the most revered chorus pedals of all time, it uses analog BBDs to modulate the signal, resulting
in the warm, rounded tone characteristic of this era.
Actual size is 2.3" x 2.42" (main board) and 1.78" x 0.86" (bypass board).
AZURE ANALOG CHORUS
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2021-11-26)
1
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Summary of Contents for aion AZURE
- Page 1 One of the most revered chorus pedals of all time, it uses analog BBDs to modulate the signal, resulting in the warm, rounded tone characteristic of this era. Actual size is 2.3” x 2.42” (main board) and 1.78” x 0.86” (bypass board). AZURE ANALOG CHORUS...
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Page 2: Table Of Contents
Mix knob to blend in the wet signal. The Azure is based on the original CE-2, but it includes the mix knob from the CE-2B. With the mix knob all the way up, it’s identical to the stock circuit, so this allows the intensity to be dialed back a bit while still preserving the originality. -
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 150k Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W AZURE ANALOG CHORUS... - Page 4 220uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. 100uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. 100n MLCC capacitor, X7R Power supply filter capacitor. 1N4739A Zener diode, 9.1V, DO-41 BBD protection diode. Use 1N4743 if using MN3007. AZURE ANALOG CHORUS...
- 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. AZURE ANALOG CHORUS...
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Page 6: Build Notes
The original CE-2 uses the MN3007 (reproductions available from Xvive), while later chorus pedals such as the CE-3 use the MN3207 (reproductions available from Coolaudio as the v3207). The Azure project is set up to allow either type to be used by soldering two jumpers in one configuration or another. - Page 7 This prevents the low frequencies from modulating in a way that would sound out of tune or dissonant in a band setting. Depth/intensity mod C18 can be changed from 47pF to 100pF to increase the maximum modulation depth or intensity. AZURE ANALOG CHORUS...
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Page 8: Schematic
SCHEMATIC 1N5817 100uF 220uF 100n 47uF 47uF IC1B IC1A RC4558P RC4558P 2N5088 470R 470n 100pF 100pF GND/VDD 2N5088 470pF 2N5088 470pF MN3207 VDD/GND 2N5088 47pF IC4A TL022 MN3102 IC4B TL022 2N5088 220k 1N914 AZURE ANALOG CHORUS... -
Page 9: Drill Template
125B INCH 0.625” 0.625” ø3/8” ø3/8” ø1/2” DEPTH RATE x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” 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” AZURE ANALOG CHORUS... -
Page 10: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B AZURE ANALOG CHORUS... -
Page 11: Wiring Diagram
WIRING DIAGRAM NC OUT GND +V +V JACK GND JACK GND GND PCB 125B AZURE ANALOG CHORUS... -
Page 12: 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 (2021-11-26) Initial release. AZURE ANALOG CHORUS...
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