FuzzDog BadMofo Bedienungsanleitung

Bad Mofo

Awesomely versative bass

overdrive preamp with blend

o reproduction permitted without the express written

Schematic

BOM

R1 1M

R2 220K

R3 2K2

R4 1K

R5 1M

R6 1K

R7 1K

R8 470R

R9 100K

R10 100K

R11 100K

R12 2K2 (CLR)

IC1 JRC4562*

D1-3 1 34A

D4-5 1 4148

D6-7 3mm Red LED

D8 1 4001

C1 100n

C2 220n

C3 2n2

C4 470p

C5 10n

C6 470p

C7 10u elec

C8 10u elec

C9 10u elec

C10 47u elec

DRIVE 100KB

LEVEL 100KA

TREBLE 100KB

BLE D 100KB

SWITCH 3P4T rotary

*other dual op amps

will work, such as 4558

The power and signal pads on the PCB conform to

the FuzzDog Direct Connection format, so can be

paired with the appropriate daughterboard for

quick and easy offboard wiring.

Be very careful when soldering the diodes and

LEDs. 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. Keep exposure to heat to a minimum (under

2 seconds). Best to use a socket for the chip.

The striped leg (cathode) of the diodes goes into

the square pad. Short leg of the LEDs goes into the

square pad.

The long leg (anode) of the electrolytic capacitors

go into the square pads.

The large 47u (C10) capacitor can lay flat over the

rotary switch once that’s in place. This will give you

plenty of clearance in the enclosure. You’ll still

have access to the pads for this once all the pots

etc are in place.

Snap the small metal tag off the pots so they can

be mounted flush in the box.

Align the switch so the round locator tab

on the top side is in the same postion

as the marking on the board >>>

You’ll have to snap this off to mount the switch

flush in the enclosure.

Pots mount on the back side of the board. You can

use vertical-mount pots or just wire up ‘normal’

ones. As the rotary switch is quite deep you’ll have

to line the pots up with it once its in place. Solder

the switch in before the pots. ow place your pots

in the board and align them so they’re at the same

level as the switch. In the case of the switch

supplied with the kits, the pot pin will only just

stick out of the other side of the board when at the

right hight. It’s easiest if you only solder a single

pin of the pots until you get the height right.

1 2 3

PCB

Align

Test the board!

NDER NO CIRC MSTANCES will troubleshooting help

be offered if you have skipped this stage. No exceptions.

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 O T. Connect IN and O T 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.

BATTERY

IN OUT

Your nice, new circuit board

INCLUDING WIRED POTS!!!!

IN 9V GND OUT

(if using a daughterboard please refer to the relevant document)

Wire it up - DC only version

his circuit is standard, Negative GND. Your power supply should be

ip Negative / Sleeve Positive. hat’s the same as your standard pedals

(Boss etc), and you can safely daisy-chain your supply to this pedal.

he BOARD GND connections don’t all have to connect to one point.

hey can be daisy-chained around the circuit, using larger connection

points (such as jack socket lugs) for multiple connections. As long as

they all connect together in some way.

BOARD

OUT

BOARD

GND

BOARD

GND

BOARD

GND

BOARD

INPUT

OUT

BOARD

GND

BOARD

LED+

(if using a daughterboard please refer to the relevant document)

Wire it up - with battery

his circuit is standard, Negative GND. Your power supply should be

ip Negative / Sleeve Positive. hat’s the same as your standard pedals

(Boss etc), and you can safely daisy-chain your supply to this pedal.

he BOARD GND connections don’t all have to connect to one point.

hey can be daisy-chained around the circuit, using larger connection

points (such as jack socket lugs) for multiple connections. As long as

they all connect together in some way.

PedalParts.co.uk

BOARD

OUT

BOARD

GND

BOARD

GND

BOARD

GND

BOARD

INPUT

BATTERY

OUT

BOARD

GND

BOARD

LED+

Just because the

FuzzDog enclosure

won’t take a battery,

there’s nothing

stopping you using a

bigger box.

Drilling template

Hammond 1590BB

SpectreVerb

Recommended drill sizes:

Pots 7mm

Jacks 10mm

Footswitch 12mm

DC Socket 12mm

Rotary 10mm

his 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

28mm

It’s a good idea to drill the holes for the pots 8mm to give

yourself some wiggle room unless you’re a drill ninja

hree different

DC socket

positions shown.

ake your pick.

BAD MOFO

27mm34mm

Plenty of room...

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