FuzzDog Axis Fuzz User manual

Axis Fuzz
Fuzzy Silicon
Scre ming Be sty
PedalParts.co.uk

Schem tic
BOM
R1 2M2
R2 680K
R3 820K
R4 180K
R5 10K
R6 220R
R7 47K
R8 220R
R9 100K
R10 39K
R11 22K
R12 2K2*
C1 100n
C2 470p
C3 22u
C4 2.2u
C5 100n
C6 22u
C7 1n
C8 22u
Q1 2N3906
Q2 2N3904
DRIVE 2KB
VOL 50KA
According to the good people over at Fuzz Central the circuit will sound
better without 8 and C7 (in red on schematic). I wouldn’t like to say, but
since you have the parts anyway why not try with and without? you can
always just snip them out.

Pots mount on the rear of the PCB, opposite side to the
components.
Wiring shown overleaf will disconnect the battery when you
remove the jack plug from the input, and also when a DC plug
is inserted.
Snap the little metal tag off the pot to mount it flush in the box.
You should use some kind of heat sink on the legs of the
transistors when soldering. They aren’t keen on heat.
Any more than 3-4 seconds of iron and they’re
toast.
ecommended assembly order:
esistors, Caps, Transistors, Wires, Pots
1 2 3

Test the bo rd!
Once you’ve finished the circuit it makes sense to test is before
starting on the switch and LED wiring. It’ll cut down
troubleshooting time in the long run. If the circuit works at this
stage, but it doesn’t once you wire up the switch - guess what?
You’ve probably made a mistake with the switch.
Solder some nice, long lengths of wire to the board connections for
9V, GND, IN and OUT. Connect IN and OUT to the jacks as shown.
Connect all the GNDs together (twist them up and add a small
amount of solder to tack it). Connect the battery + lead to the 9V
wire, same method. Plug in. Go!
If it works, crack on and do your switch wiring. If not... aw man.
At least you know the problem is with the circuit. Find out why,
get it working, THEN worry about the switch etc.
YRET
T
A
AT
B
NI UO TU

Wire it up
The Board GND connections don’t all have to directly attach to the
board. You can run a couple of wires from the DC connector, one to the
board, another to the IN jack, then daisy chain that over to the OUT jack.
It doesn’t matter how they all connect, as long as they do.
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.
Now... GO GET FUZZY!
PedalParts.co.uk
L
E
D
BOARD
OUT
BOARD
9V
BOARD
GND
BOARD
GND
BOARD
GND
BOARD
INPUT
BATTERY
+
IN
OUT
L
E
D
BOARD
GND
BOARD
LED+
+