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PROJECT NAME
AZURE
BASED ON
®
BOSS
CE-2 Chorus
EFFECT TYPE
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.
This documentation is for the kit version of the project. If you purchased the PCB by itself, please
use the
PCB-only version
are completely different due to the specialized parts and assembly methods used in the kit.
AZURE ANALOG CHORUS
IMPORTANT NOTE
of the documentation instead. The circuit is the same, but the instructions
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2024-06-01)
1
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Related Manuals for aion AZURE
Summary of Contents for aion AZURE
- Page 1 This documentation is for the kit version of the project. If you purchased the PCB by itself, please use the PCB-only version of the documentation instead. The circuit is the same, but the instructions are completely different due to the specialized parts and assembly methods used in the kit. AZURE ANALOG CHORUS...
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Page 2: Table Of Contents
22 Enclosure Layout: Main & Footswitch PCBs 23 Enclosure Layout: Input/Output PCB 24 Testing & Assembly 25 Biasing, Final Assembly, Usage 26 Schematic 27 Full Parts List 28 Troubleshooting Information 29 Support & Resale Terms 30 Legal Information & Document Revisions AZURE ANALOG CHORUS... -
Page 3: Introduction
INTRODUCTION If this is your first pedal, welcome to the hobby and thank you for choosing Aion FX. You’ve just joined a community of over 40,000 people around the world with a passion for building homemade noise machines using obsolete electronics technologies, and we’re glad to have you! If you’ve done this before, it’s great to see you again and we’re confident you’ll find this build experience... - Page 4 Electrolytic Capacitors 100k 150k NAME 220k 47uF 330k 100uF 470k 220uF Tantalum Capacitors NAME Diodes NAME 1N5817 MLCC Capacitors 1N914 NAME 1N4739A 47pF (marked “470”) 100pF (marked “101”) Transistors 470pF (marked “471”) NAME 100n (marked “104”) 2N5088 AZURE ANALOG CHORUS...
- Page 5 Mounting nut, jack, 0.54" NAME Outer washer, jack, 0.6" 3-strand wire assembly, 70mm Lock washer, jack, 0.5" (thin) 4-strand wire assembly, 122mm Enclosure 3-pin wire assembly header Enclosure screws 4-pin wire assembly header PCB, main circuit PCB, footswitch PCB, input/output/DC AZURE ANALOG CHORUS...
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Page 6: Tools Needed
The tip should used to tighten the dress nut to avoid lot of pedals! be no more than 0.1” (2.5mm) wide. scratching or denting it (which can happen with metal tools). AZURE ANALOG CHORUS... -
Page 7: Component Identification
Some voltage regulators The pins will be soldered to the also look like this. They may also look like this. adapter during kit assembly. have more than 8 legs. WIRE ASSEMBLY WIRE ASSEMBLY HEADER DC JACK LED BEZEL AZURE ANALOG CHORUS... -
Page 8: Hardware Identification
MOUNTING NUT DRESS NUT LOCK WASHER DIAMETER: 0.36” / 9.1mm DIAMETER: 0.375” / 9.5mm DIAMETER: 0.4” / 10.1mm FOOTSWITCH MOUNTING NUT DRESS NUT LOCK WASHER DIAMETER: 0.6” / 15.2mm DIAMETER: 0.77” / 19.6mm DIAMETER: 0.6” / 15.2mm AZURE ANALOG CHORUS... -
Page 9: Overview
6. Transistors 7. Electrolytic capacitors Not all of these component types are included in each kit, so skip them if they aren’t applicable. Some types of film capacitors are taller than electrolytics, so those can be done last. AZURE ANALOG CHORUS... -
Page 10: Resistors
Turn the board upside-down to keep the components held in place while you solder. Don’t try to do all of the resistors at once. You’ll want to stop periodically flip the board and solder everything, then cut the leads using the wire snippers to make room for more. AZURE ANALOG CHORUS... -
Page 11: Diodes
D2 and D3 (1N914) are the two smaller orange and black ones. The larger orange and black one is Z1, the 1N4739A. When trimming the leads after soldering, set aside two of the leftover leads from the 1N914 diodes. We will use these in the next step. AZURE ANALOG CHORUS... -
Page 12: Jumpers
If you want to be extra careful, you can use your multimeter in continuity test mode to ensure that there is no connection between the two vertical pairs of pads before moving onto the next step. AZURE ANALOG CHORUS... -
Page 13: Sockets & Ics
ICs may have two different orientation marks: either a dot in the upper-left or a half-circle notch in the middle of the top side. Some ICs have both marks. This shows which way the IC should be rotated when inserting it into a socket (the socket also has a half-circle notch). AZURE ANALOG CHORUS... -
Page 14: Trimmer
Next, we’ll do the trimmer. Bend the legs outward to keep it in place while soldering. Setting the trimmer This trimmer will be used for the calibration process on page 25 and should not be adjusted once this is completed. For now, set it to the 50% position (12:00 noon). AZURE ANALOG CHORUS... -
Page 15: Transistors
Now we’ll do the five transistors. For each, if the legs are not already bent into 0.1” spacing, use your needle-nose pliers to bend the outer two legs as shown. Once installed, bend the two outer legs to hold it in place on the board. Then, solder them in place and clip the leads. AZURE ANALOG CHORUS... -
Page 16: Capacitors (Non-Polarized)
C4, C5, C11, C16, and C18 are blue MLCC capacitors taped to cardboard. For these, the value will be written on the cardboard. C25 (100n MLCC) is always yellow. It can be hard to read the code since it’s so small, so it’s easier to identify this one by color. AZURE ANALOG CHORUS... -
Page 17: Wire Headers
They do fit pretty tightly in the holes, though, so press firmly. There’s also a 4-pin header on the I/O board that we will do in a later step. AZURE ANALOG CHORUS... -
Page 18: Capacitors (Polarized)
Like electrolytics, the longer leg still goes in the square pad. These are the last of the on-board components. Now is the time to go back to page 13 and insert the ICs into the sockets. AZURE ANALOG CHORUS... -
Page 19: Footswitch Pcb
BLUE MARKING Once all three wire assemblies are soldered, set the footswitch PCB aside. We’ll solder the actual footswitch and LED in a later step. AZURE ANALOG CHORUS... -
Page 20: Input/Output Pcb
PCB. There’s not a lot of clearance between the bottom of this board and the top of the main PCB once everything is in place, and you don’t want the pins to short against anything on accident. AZURE ANALOG CHORUS... -
Page 21: Enclosure Layout: Panel Mounts
You’ll need to hold the bezel in place when OUTER WASHER tightening the nut. Be aware that the bezel is fairly MOUNTING NUT sharp. Try using a rubber band for grip instead of just pressing your finger against the bottom. AZURE ANALOG CHORUS... -
Page 22: Enclosure Layout: Main & Footswitch Pcbs
However, Aion FX projects are designed to be extremely easy to remove from the enclosure for troubleshooting, with no desoldering required—so with these kits, it’s actually much easier to “box it before you rock it”. -
Page 23: Enclosure Layout: Input/Output Pcb
Note the use of two mounting nuts on each of the jacks, one inside and one outside. The inner nut acts as a spacer to set the DC jack flush with the outside of the enclosure. The inner nuts should be threaded as far down as they can go. MOUNTING NUT OUTER WASHER LOCK WASHER MOUNTING NUT 125B AZURE ANALOG CHORUS... -
Page 24: Testing & Assembly
Don’t over-tighten or you could damage the set screw. But on the other hand, if it’s not tight enough then the knob will be prone to falling off or losing its alignment with the markings on the enclosure. AZURE ANALOG CHORUS... - Page 25 If doesn’t work, or doesn’t sound quite right after calibration didn’t work, don’t be discouraged. See page 28 for troubleshooting info. USAGE The Azure has three controls: • Rate sets the speed of the chorus effect. • Depth sets the intensity of the chorus effect.
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Page 26: Schematic
SCHEMATIC 1N5817 100uF 220uF 100n 47uF 47uF IC1B IC1A RC4558P RC4558P 2N5088 470R 470n 100pF 100pF GND/VDD 2N5088 470pF 2N5088 470pF v3207 VDD/GND 2N5088 47pF tantalum IC4A TL022 v3102 IC4B TL022 2N5088 220k 1N914 AZURE ANALOG CHORUS... -
Page 27: Full Parts List
470pF MLCC 100n MLCC 33n film 33n film 3n3 film 47pF MLCC Diodes Potentiometers Switches PART VALUE PART VALUE PART VALUE PART VALUE JRC4558D 1N5817 Rate 100kB 3PDT stomp v3207D 1N914 Depth 100kB v3102D 1N914 250kC TL022 1N4739A AZURE ANALOG CHORUS... -
Page 28: Troubleshooting Information
VOLTAGE VOLTAGE VOLTAGE VOLTAGE VOLTAGE 9.35 9.35 9.35 6.00 ~ 7.00 9.36 4.60 4.99 4.71 0.43 ~ 0.50 2.00 ~ 7.00 4.20 4.47 4.28 1.50 ~ 6.50 AZURE ANALOG CHORUS... - Page 29 “goop” the PCB or otherwise obscure the source. In other words: you don’t have to go out of your way to advertise the fact that you use Aion FX kits, but please don’t go out of your way to hide it.
- Page 30 These kits are intended to be built by the customer. Aion FX is not responsible for language that may be used by the customer in the marketing or resale of the finished product.
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