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Build Your Own Clone
Mega Chorus & Vibrato
Kit Instructions
Warranty:
BYOC, Inc. guarantees that your kit will be complete and that all parts and components
will arrive as described, functioning and free of defect. Soldering, clipping, cutting,
stripping, or using any of the components in any way voids this guarantee. BYOC, Inc.
guarantees that the instructions for your kit will be free of any majors errors that would
cause you to permanently damage any components in your kit, but does not guarantee
that the instructions will be free of typos or minor errors. BYOC, Inc. does not warranty
the completed pedal as a whole functioning unit, nor do we warranty any of the
individual parts once they have been used. If you have a component that is used, but feel
it was defective prior to you using it, we reserve the right to determine whether or not the
component was faulty upon arrival. Please direct all warranty issues to:
sales@buildyourownclone.com This would include any missing parts issues.
Return:
BYOC, Inc. accepts returns and exchanges on all products for any reason, as long as they
are unused. We do not accept partial kit returns. Returns and exchanges are for the full
purchase price less the cost of shipping and/or any promotional pricing. Return shipping
is the customer's responsibility. This responsibility not only includes the cost of
shipping, but accountability of deliver as well. Please contact
sales@buildyourownclone.com to receive a return authorization before mailing.

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Summary of Contents for BYOC Mega Chorus & Vibrato Kit

  • Page 1 BYOC, Inc. does not warranty the completed pedal as a whole functioning unit, nor do we warranty any of the individual parts once they have been used.
  • Page 2 That being said, we will do our best to help you as much as we can. Our philosophy at BYOC is that we will help you only as much as you are willing to help yourself. We have a wonderful and friendly DIY discussion forum with an entire section devoted to the technical support and modifications of BYOC kits.
  • Page 3: Table Of Contents

    Mega Chorus & Vibrato Kit Instruction Index Parts Checklist………………………....…..page 6 Populating the Circuit Board……....…...…..page 8 Main PCB Assembly..........page 17 Wiring………………………………......page 19 Installing the IC/Finishing up…………………..page 25 Operation Overview...........page 26 Schematic..............page 27...
  • Page 4 This is what your kit should look like when it’s complete. Your kit may come with different color capacitors, switches etc. Don’t be alarmed by this. They all still do the exact same thing.
  • Page 6: Parts Checklist

    Parts Checklist for Mega Chorus & Vibrato Kit Resistors: 2 – 390R (Orange/White/Black/Black/Brown) 1 – 470R (Yellow/Purple/Black/Black/Brown) 2 - 1k (Brown/Black/Black/Brown/Brown) 1 – 2k2 (Red/Red/Black/Brown/Brown) 1 – 2k7 (Red/Purple/Black/Brown/Brown) 4 - 4k7 (Yellow/Purple/Black/Brown/Brown) 2 – 6k8 (Blue/Grey/Black/Brown/Brown) 24 - 10k (Brown/Black/Black/Red/Brown) 4 –...
  • Page 7 IC's: 5 - DIP 8 Socket 1- TL022 1- 3102 clock driver (3101 used only if 3007 is used) 1- 3207 BBD (3007 is optional) 2 – TL072 or 4558 Transistor: 8 – 2N3904, 2N5088, 2N2222 or other similar transistor with EBC pinout. 1 –...
  • Page 8: Populating The Circuit Board

    Populating the Circuit Board Step 1: Add all the resistors. Resistors are not polarized and can be inserted in either direction. Be sure to save the lead clippings. You will need them for the next step. NOTE: Only add ONE 56k resistor to one of the spaces highlighted in yellow. If you are using a 3207 BBD, insert the 56k resistor into the space labeled “3207”...
  • Page 9 Step 2: Add jumpers to the highlighted areas. This is done by using a small amount of lead clipping left over from the last step to make a zero resistance connection. NOTE: The space labeled “JUMP” will be jumpered regardless of what BBD you are using. If you are using a 3207 BBD, you will put jumpers in both spaces labeled “3207”...
  • Page 10 Add the diodes. Be sure to match the end of the diode with the stripe Step 3: to the layout on the PCB. The stripped end should go in the square solder pad. The 1N4148 diodes will go in the 4 smaller spaces. The 1N4001 goes in the larger space.
  • Page 11 Add 4 pin IC sockets. Be sure to orient the socket so that the end Step 4: with the notch matches up with the notch on the layout. ONLY SOLDER THE SOCKET! NOT THE ACTUAL IC! This is a socket. The sockets get soldered to the PCB.
  • Page 12 Step 5: Add the transistors. Orient them so that the flat side matches up with the flat side on the PCB layout. Be sure to insert the 78L08 8v regulator into the space labeled “V REG”.
  • Page 13 Step 6: Add the 25k and 50k Trim pots. Note that there are 5 holes on the PCB, but only 3 leads on the actual trimpot. Please do not let this confuse you. This is so that the PCB can accommodate a variety of trimpots. There should only be one way to fit the trimpot into the PCB.
  • Page 14 Step 7: Add the film and ceramic disc capacitors. These are non-polarized so they can go in either direction.
  • Page 15 Step 8: Add the aluminum electrolytic capacitors. These ARE polarized, meaning there is a positive and negative end. The positive side will have a longer lead and goes in the square solder pad. The negative side will have a shorter lead and a stripe running along the body of the cap, and goes in the round solder pad.
  • Page 16 At this point your board should look like this: ( If built to 3207 spec’s)
  • Page 17 Step 9: Add the battery snap. Load the snap wires in the strain relief holes through the bottom of the PCB and insert the stripped ends of the wire into the solder pads through the top side of the PCB. Solder on the bottom side.
  • Page 18 Step 10: Add wires to the “Ring”, “1”, “2”, “5”, “7” and the two Ground eyelets. Start by cutting seven 4” pieces of wire. You will want to strip 1/4” off each end and tin the ends. Tinning means to apply some solder to the stripped ends of the wires. This keeps the strands from fraying and primes the wire for soldering.
  • Page 19: Main Pcb Assembly

    Main PCB Assembly Step 1: Flip the PCB over so that the bottom or solder side is up. Insert the tsix potentiometers, toggle switch, and LED into the bottom side of the PCB. DO NOT SOLDER ANYTHING YET!!! The LED will have one lead that is longer than the other.
  • Page 20 Step 2: Hold the PCB in one hand so that the component side of the PCB is in the palm of your hand and the bottom side with the pots and LED are facing up. Now use your other hand to guide the predrilled enclosure onto the PCB assembly so that the pots, toggle switch and LED all go into their respective holes.
  • Page 21: Wiring

    Wiring Step 1: Mount the DC adapter jack to the enclosure. Your kit may come with either an external thread or internal thread. Don’t get confused by this. They still function exactly the same. You just thread the external nut on the outside and the internal nut on the inside.
  • Page 22 Stereo (Input) Jack Mono (Output) Jack Step 2: Install the 1/4” jacks to the enclosure. Step 3: Wire the “power section” of the pedal according to the diagram below. You do not need to use red or black wire for this. The wire that comes with your kit will work just fine.
  • Page 23 Step 4: Install the footswitch. Orient the footswitch so that the flat sides of the solder lugs are like the diagram below. NOTE: There are no actual number markings on the footswitch. There are two correct ways you can orient the footswitch. They are both 180 degrees of each other.
  • Page 24 Step 7: Wire the PCB to the foot switch and jacks. SLEEVE SLEEVE...
  • Page 25 Installing IC/Finish up Don't forget to adjust the trimpots, add the knobs, put the cover on the enclosure, and apply the bumpers to the cover.
  • Page 26: Operation Overview

    Operating Overview Blend: Controls the ratio of wet vibrato signal to dry signal. Depth: Controls the intensity of the wet vibrato signal. Speed: Controls the speed of the Low Frequency Oscillator (LFO). Tone: Clockwise adds high frequencies in the wet signal. Counter clockwise cuts high frequencies in the wet signal.
  • Page 27 Shape: Changes the shape of the LFO. Counter clockwise produces a saw wave (bends pitch up faster and down slower). Clockwise produces a ramp wave (bends pitch up slower and down faster). Sine/Triangle Switch: Power supply: 9V battery or 2.1mm negative tip. 9V ONLY!!!! Current Draw: 14.5 mA Input Impedance: 470k ohms Output Impedance: 100k ohms...
  • Page 29 For hi-res schematic visit http://www.byocelctronics.com/mcvschematic.pdf Please visit http://byocelectronics.com/board for any technical support copyright 2014 BYOC, Inc.