FuzzDog Ultimatum Fuzz User manual

Ultimatum Fuzz
The Ultimate experience in
vintage-style octave-up fuzz
Contents of this document are ©2015 Pedal Parts Ltd.
No reproduction permitted without the express written
permission of Pedal Parts Ltd. All rights reserved.

Schematic + BOM
R1 1M
R2 1
R3 47
R4 47
R5 100
R6 100
R7 4 7
R8 100
R9 4 7
R10 100
R11 100
R12 220R
R13 CLR (2 2)
R14 CLR (2 2)
R15 15
R16 150
R17 10
R18 1
R19 22
R20 4 7
R21 470
R22 47
R23 1 5
R24 10
R25 100
C1 47n
C2 47n
C3 1n
C4 10u elec
C5 10u elec
C6 10u elec
C7 10u elec
C8 10u elec
C9 10u elec
C10 15n
C11 100n
C12 10u elec
C13 10u elec
C14 100u elec
C15 10p
C16 1n
D12 1N34A
D34 LED
D56 1N34A
D7 1N4001
Q14 2N3904
TONE 100 B
VOL 100 B
SUST 100 B
SW1 DPDT

Be very careful when soldering the diodes, LEDs and transistors. They’re very sensitive to heat. You
should use some kind of heat sink (crocodile clip or reverse action tweezers) on each leg as you
solder them. eep exposure to heat to a minimum (under 2 seconds).
The long leg (anode) of the electrolytic capacitors go into the square pads. The striped leg (cathode)
of the diodes goes into the square pads. C14 should be placed flat to the board as seen on the
cover image. This gives lots of clearance when mounting into the enclosure.
Snap the small metal tag off the pots so they can be mounted flush in the box.
Pots and switches mount on the back side of the board. Red line in the image above shows the
direction of the switch tags. If you’re using board-mounted pots you’ll have to place these last as
they’ll restrict your access to the pads for the other components.
Pots and toggle switch mount on the back side of the board. You can use vertical-mount pots or
just wire up ‘normal’ ones. It’s a good idea to place the pots in their holes in the enclosure when
you’re soldering them in place on the PCB. That way you know they’re going to line up ok. Best way
to do it is to solder a single pin of each pot in place, then do a visual check to see that they’re all
sitting at the same height. If not, melt the joints and readjust any that are off.
PCB Layout ©2015 Pedal Parts Ltd.

The back of your board should be looking lovely, just like this (except you haven’t attached the
ribbon cable yet - just imagine it isn’t there).
You’re ready to get the footswitch daughterboard set up. Let’s go...

When mounting the footswitches it’s a good idea to do it using the enclosure. Drop the footswitches
into their holes in the enclosure, but on the top face on the box (as above). Now place your
daughterboard onto the switches and get them nice and straight. Solder a single tag of each
footswitch into place, then take them out of the enclosure and check the positioning. You want the
tags as horizontal as possible for the best fit, and the switches should be flat against the PCB. If
they’re at all wonky, melt the solder joint and adjust. Once they’re looking good and you’re sure they
still sit in the enclosure holes ok, get the other tags soldered in too. Don’t forget to solder in the
current limiting resistors for your LEDs, but leave the LEDs out for now.

Now you need to join the two boards together. You have a nice 6-way ribbon cable, right? If not, just
run six lengths of wire between the two boards. The pads are clearly marked, just join like for like.
Now attach some decent lengths of wire to the rest of the offboard pads - your V and G connections
at the top of the board, and your jack connections on the daughterboard. Ignore those LEDS again -
they aren’t really there...

Now we take a break from the norm. Usually you’d do some testing before boxing up your circuit. In
this case there are only six connections to make offboard, and they’re the same connections you’d
have to make to test the circuit as to actually complete it, so let’s go ahead and make them neat.
NOW we get to place those LEDs too. Pull the LEDs through the board (long leg to round pad), and
bend the legs slightly so they don’t fall out. Get your jacks and DC socket in place and tightened.
Now drop your two circuit boards into place and tighten things up. Connect your jack and DC wires
(there’s a diagram on the next page if it needs to be clearer than the pic below). Of course, your DC
socket will be on the correct side of the enclosure. Oops!
You can now get your LEDs in place. Unbend the legs and push them down to locate into their
holes in the enclosure. Once seated, solder them in. Simple! No need for bezels.
WHY IS THERE AN EXTRA PAD FOR THE ‘OCTAVE’ FOOTSWITCH LED...?
You can use a bi-colour LED in there if you want, i.e. green for normal, red for octave.
Use a common-anode LED. We like to keep it simple around here though, so a standard LED is supplied.

Wiring
IN OUT
Couldn’t be much simpler. Six wires to connect as above.
This circuit is standard, Negative GND. Your power supply should be Tip Negative / Sleeve Positive.
That’s the same as your standard pedals (Boss etc), and you can safely daisy-chain your supply to
this pedal.

Drilling template
Hammond 1590BB
91 x 116 x 30mm
(top face dimensions, not including lid)
Recommended drill sizes:
Pots 7mm
Jacks 10mm
Footswitch 12mm
DC Socket 12mm
Toggle Switch 6mm
This template is a rough guide only. You should ensure correct marking of your
enclosure before drilling. You use this template at your own risk.
Pedal Parts Ltd can accept no responsibility for incorrect drilling of enclosures.
PedalParts.co.uk
30mm
19mm
It’s a good idea to drill the holes for the pots and toggle
1mm larger to give
yourself some
wiggle room
unless you’re a
drill ninja
60mm
14mm