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

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

BOARD

OUT

BOARD

GND

BOARD

GND

BOARD

GND

BOARD

INPUT

BATTERY

OUT

BOARD

GND

BOARD

LED+

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