BYOC ESV Fuzz Silicon User manual

Build Your Own Clone
E.S.V. Fuzz (Silicon)
NPN Negative Ground
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:
[email protected] 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
[email protected] to receive a return authorization before mailing.
Tech Support:
BYOC, Inc. makes no promises or guarantees that you will successfully complete your
kit in a satisfactory manor. Nor does BYOC, Inc. promise or guarantee that you will
receive any technical support. Purchasing a product from BYOC, Inc. does not entitle
you to any amount of technical support. BYOC, Inc. does not promise or guarantee that
any technical support you may receive will be able to resolve any or all issues you may
be experiencing.
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.
www.buildyourownclone.com/board
When posting a tech support thread on the BYOC forum, please post it in the correct
lounge, and please title your thread appropriately. If everyone titles their threads
“HELP!” then it makes it impossible for the people who are helping you to keep track of
your progress. A very brief description of your specific problem will do. It will also
make it easier to see if someone else is having or has had the same problem as you. The
question you are about to ask may already be answered. Here is a list of things that you
should include in the body of your tech support thread:
1. A detailed explanation of what the problem is. (more than, “It doesn’t work, help”)
2. Pic of the topside of your PCB.
3. Pic of the underside of your PCB.
4. Pic that clearly shows your footswitch/jack wiring and the wires going to the PCB
5. A pic that clearly shows your wiring going from the PCB to the pots and any other
switches(only if your kit has non-PC mounted pots and switches)
6. Is bypass working?
7. Does the LED come on?
8. If you answered yes to 6 and 7, what does the pedal do when it is in the "on" position?
9. Battery or adapter (if battery, is it good? If adapter, what type?)
Also, please only post photos that are in focus.
Revision Notes:
E.S.V. Fuzz Rev 3.0 No known errors.
Copyrights:
All material in this document is copyrighted 2013 by BYOC, Inc.

E.S.V. Fuzz (NPN) Kit Instruction Index
Parts Checklist……………………….................…..page 6
Populating the Circuit Board…….................……..page 7
Main PCB Assembly..................................................page 16
Wiring……………………………….........................page 21
Orienting the Transistors/Finish up……....……....page 27
Operation Overview.................................................page 28
Schematic..................................................................page 29

Parts Checklist for ESV Fuzz NPN Silicon Kit
Resistors:
1 - 330ohm (orange/orange/brown/gold)
1 - 4.7k (yellow/purple/red/gold)
1 - 33k (orange/orange/orange/gold)
1 - 100k (brown/black/yellow/gold)
1 - 1M (brown/black/green/gold)
Trimpot:
1 - 25k trimmer
Capacitors:
1 - 0.01uf film
1 - 2.2uf aluminum electrolytic
1 - 22uf aluminum electrolytic
1- 150pf ceramic disc
Transistors:
2 – BC108 or BC109C NPN Silicon Transistors
2 - Transistor sockets
Potentiometers: SNAP THE SMALL TABS ON THE TOP OF THE POTS OFF WITH A
PAIR OF NEEDLE NOSE PLIERS
1 - A500K Audio Volume pot
1 - B1K Linear Fuzz pot
Hardware:
1 - predrilled enclosure w/ 4 screws
1 -E.S.V. Fuzz circuit board
1 - 3pdt footswitch
2 - knobs
1 - AC adaptor jack
1 - ¼”stereo jack
1 - ¼” mono jack
1 - battery snap
1 - red LED
hook-up wire

Populating the Circuit Board
Step 1: Add the transistor sockets. Make sure that the tab on the socket matches up with
the tab on the circuit board. Do not add the transistors yet and do not solder the
transistors to anything. Only solder the sockets.

Step 2: Add all the resistors. Resistors are not polarized and can be inserted in either
direction. Save the excess lead clippings from these resistors. You will need them to
make jumpers in the next step.
Use the 330 ohm resistor for silicon transistors. You would only want to use 470 ohm for
germanium transistors.
1M WILL NEED TO BE SLIGHTLY BENT TO THE RIGHT TO FIT NEXT TO THE
Q2 SOCKET

Step 2: Use the left over lead clippings from the last step to make two jumpers that
connect the “N” eyelets to the two unlabeled eyelets. These jumpers will make the circuit
have a negative ground. If you were to make the jumpers to the “P” eyelets, that would
give the circuit a positive ground.

Step 4: Add the bias trimpot. The board is designed to accept several brands of
trimmers, but there is only one way to insert the trimpot that comes with the kit.
Directions for setting the trimpot are in the “Finish Up” portion of the directions.

Step 5: Add the 0.01uf film capacitor. This is non-polarized so it can go in either
direction.

Step 6: Add the aluminum electrolytic capacitors. These are polarized, meaning there is
a positive and negative end. You will be able to identify the positive end by the indented
collar around that side. For the 2.2uF cap, the positive end goes in the square solder pad.
It should be obvious from the layout how to orient the 2.2uF. The 22uF depends on
whether you are building for NPN or PNP. Here we are building for NPN, so the
positive end of the 22uF cap goes in the side that says “NPN”.

Step 7: Add the 150pf ceramic disk capacitor if you’d like.This is not
labeled on the PCB. This component was not part of the original fuzz face
circuit. It prevents the higher gain silicon transistors from feeding back
when you have the fuzz knob all the way up. We highly recommend that
you add this capacitor.

Step 8:Add the battery snap. Thread the solder ends of the battery snap into
the strain relief holes from the bottom solder side of the PCB and out
through the top. Insert the solder ends of the battery snap wires into the
topside of their respective solder pads. Solder on the bottom side of the
PCB. Remember the red wire goes in the “+” hole and the black wire goes
in the “-” hole.

Step 9: Add wires to the IN, OUT, RING, two Ground eyelets, and DC adapter eyelets.
Start by cutting five 2.5” pieces of wire, and three 1” pieces. 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. Solder a 2.5” piece of
wire to each of the IN, OUT, RING, and Ground eyelets on the PCB. Solder a 1” piece
to each of wire to the DC adapter jack eyelets on the PCB. Load the wires in from the
top and solder on the bottom of the PCB.

Main PCB Assembly
Step 1: Mount the AC 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. The picture below is of an internal
nut jac

Step 2: Flip the PCB over so that the bottom or solder side is up. Insert the
B1k (FUZZ) & A500k (VOLUME) potentiometers, and the 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. MAKE SURE THE
LONGER LEAD GOES IN THE HOLE MARKED “N” AND THE
SHORTER LEAD IN THE HOLE MARKED “P”!!!!!!
B1k
A500k
LED

Step 3: 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, toggle switch
and LED is facing up. Now use your other hand to guide the predrilled
enclosure onto the PCB assembly so that the pots and LED all go into their
respective holes. Once the PCB assembly is in place, secure it by screwing
on the washers and nuts for the pots. Only tighten them with your fingers.
You do not want them very tight yet.
Step 4: Turn the entire pedal over so that the component side of the PCB is
facing up. Lift the PCB up off the pots about 2mm just to make sure that the
back of the PCB does not short out against the pots. Make sure the PCB is
level and symmetrically seated inside the enclosure.
Step 5: Solder the pots and LEDs. You will solder these parts on the
component side of the PCB. After you have soldered them in place, be sure
to tighten up their nuts.

Step 6: Connect the TIP (negative) terminal of the DC adaptor jack to the
eyelet on the PCB labeled “-“. Connect the SLEEVE of the DC adaptor jack
to the eyelet on the PCB labeled “+”. Connect the battery disconnect
terminal of the DC adaptor jack to the eyelet on the PCB labeled “(+)”. See
diagram on the next page.