FuzzDog Big Fluff Pie Manuel utilisateur

Big Fluff Pie

Everyone loves a

big chunk of fluff

No reproduction permitted without the express written

mportant notes

If you’re using any of our footswitch daughterboards,

DOWNLOAD T E DAUG TERBOARD DOCUMENT

•Download and read the appropriate build document for the daughterboard

as well as this one BEFORE you start.

•DONOT solder the supplied Current Limiting Resistor (CLR) to the main

circuit board even if there is a place for it. This should be soldered to the

footswitch daughterboard.

POWER SUPPLY

Unless otherwise stated in this document this circuit is designed to be

powered with 9V DC.

COMPONENT SPECS

Unless otherwise stated in this document:

•Resistors should be 0.25W. You can use those with higher ratings but

check the physical size of them.

•Electrolytics caps should be at least 25V for 9V circuits, 35V for 18V

circuits. Again, check physical size if using higher ratings.

LAYOUT CONVENTIONS

Unless otherwise stated in this document, the following are used:

•Electrolytic capacitors:

Long leg (anode) to square pad.

•Diodes/LEDs:

Striped leg (cathode) to square pad. Short leg to square pad for LEDs.

•ICs:

Square pad indicates pin 1.

Schematic

Some of the components shown are not in standard Big Fluff builds.

SW1, D3 and D6 are only used if you want altertive clipping selection. f you

aren’t including this place a jumper in either spot shown in BLUE below.

S IFT is only included if you’re using an alternative tone stack with mid shift.

f you’re going for a standard 3-pot version include the jumper shown in RED.

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. Check the separate

daughterboard document for details.

Be very careful when soldering the diodes

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.

Keep exposure to heat to a minimum

(under 2 seconds).

Snap the small metal tag off the pots so

they can be mounted flush in the box.

Positive (anode) legs of the electrolytic cap

goes to the square pad.

C14 can be laid flat to the PCB as shown

on the cover image. This will give more

clearance in your enclosure.

Negative (cathode) legs of the diodes go to

the square pads.

D7 is an optional polarity protection diode.

f you want to include one, use a 1N4001 or

any other 400X variant.

TWO SETS OF TONE PADS?

Yes. Use the centralised pads above R25 for a

3-pot build, and the ones off to the right of

the PCB for a 4-pot build. There’s no need

for any jumpers in either situation. Both sets

of pads are directly linked to each other.

T AT SCOOPED MID-RANGE

- NOT ANKS!

The Big Fluff Pie has a distinctive scooped

mid-range. n most cases this can be

flattened out if desired. For the versions

listed in the first BOM page, this can be

achieved by changing R18 and R19 to 39K,

and C10 to 10n.

MOJO?

Many different transistors have been used

across the history of the BFP, some of which

are long gone. All of the ‘stock’ Fluffs listed

on the first BOM page are supplied with

2N5088.

While these may not always be the vintage-

correct parts, they have been found to be the

best commonly-available all-rounder in a

BFP.

There are additional notes regarding

individual circuits later in the document.

Please check them before starting your

build.

Not sure what to make?

Check out Kit Rae’s page.

Astounding work.

Notes

CLIPPING SELECTION SWITC

There are two sets of pads to select extra

clipping diodes if you want some variation in

your pedal. SW1 (vertical) is placed to sit

neatly in the middle of your knobs on a 3-pot

build. SW2 (horizontal) works for a 4-pot

version. The jumpers shown on the previous

page will bring diodes D4-5 into the mix. f

you prefer to use the larger spaces (D3-D6)

for a single clipping configuration you can

jumper the opposite pads.

To incorporate an alternative clipping section

on the Q3 gain stage, select some suitable

diodes for D3-D6. There are no rules. Google

is your friend. Socket and experiment.

Add a SPDT ON-ON toggle switch in SW1 or

SW2 to select between the two sets of

clipping (D4-D5 / D3-D6).

f you want to get really freaky you can use a

SPDT ON-OFF-ON switch which will remove

the clipping from that gain stage altogether.

There’ll be a big volume jump with the switch

in the middle position though, so use

caution.

ALTERNATIVE TONE SECTION

We’ve incorporated parts so you can easily

modify the tone stack and add a mids

control. We’ve stuck to the simple elegance

of the AMZ Presence Control.

You can experiment with your own values,

but these two set-ups offer some great tonal

variation. For more info take a look at this

very informative page:

http://www.muzique.com/lab/tone3.htm

AMZ Control #1

R18 3K3

R19 39K

C10 12n (10n will be fine)

C11 10n

SHIFT 25KB

TONE 100KB

AMZ Control #2

R18 3K3

R19 470K

C10 15n

C11 1n5

SHIFT 25KB

TONE 250KA

Notes

Green Black Civil War 73#18 Violet NYC

BOM 3rd (70s) Russian Russian Russian Triangle Ram ead Ram ead Reissue

R1 39K 39K 39K 39K 33K 33K 33K 39K

R2 100K 100K 100K 100K 100K 100K 100K 100K

R3 470K 470K 470K 470K 470K 470K 470K 510K

R4 100R 390R 390R 390R 150R 100R 100R 100R

R5 15K 12K 12K 12K 15K 12K 12K 10K

R7 1K 1K 1K 1K 1K 820R 560R 1K8

R8 8K2 10K 10K 10K 8K2 7K5 8K2 10K

R9 100K 100K 100K 100K 100K 100K 100K 100K

R10 470K 470K 470K 470K 470K 470K 470K 470K

R11 15K 12K 12K 12K 12K 12K 12K 10K

R12 100R 390R 390R 390R 150R 100R 100R 390R

R13 8K2 10K 10K 10K 8K2 7K5 8K2 10K

R14 100R 390R 390R 390R 150R 100R 100R 390R

R15 470K 470K 470K 470K 470K 470K 470K 470K

R16 100K 100K 100K 100K 100K 100K 100K 100K

R17 15K 12K 12K 12K 12K 12K 12K 10K

R18 22K 22K 22K 22K 33K 33K 33K 22K

R19 39K 20K 22K 20K 33K 33K 33K 22K

R21 100K 100K 100K 100K 100K 100K 100K 100K

R22 390K 470K 470K 470K 470K 470K 470K 470K

R23 2K2 2K 2K7 2K7 2K7 3K3 2K7 2K

R24 10K 10K 10K 10K 12K 12K 12K 10K

R25 1M 1M 1M 1M 1M 1M 1M 1M

C1 100n 100n 100n 100n 100n 100n 100n 1u

C2 470p 470p 470p 560p 500p 470p 470p 470p

C3 1u 100n 100n 100n 100n 100n 100n 1u

C4 1u 100n 100n 100n 100n 150n 100n 1u

C5 470p 470p 470p 560p 500p 470p 470p 470p

C6 100n 47n 47n 47n 47n 47n 100n 1u

C7 1u 100n 100n 100n 100n 100n 100n 1u

C8 470p 470p 470p 560p 500p 470p 470p 470p

C9 100n 47n 47n 47n 47n 100n 100n 1u

C10 3n9 3n9 3n9 3n9 3n9 3n9 3n9 3n9

C11 10n 10n 10n 10n 10n 10n 10n 10n

C12 100n 100n 100n 100n 100n 100n 100n 1u

C13 100n 100n 100n 100n 100n 100n 100n 1u

C14 100u 100u 100u 100u 100u 100u 100u 100u

Q1 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088

Q2 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088

Q3 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088

Q4 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088 2N5088

D1 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148

D2 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148

D3 empty empty empty empty empty empty empty empty

D4 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148

D5 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148

D6 empty empty empty empty empty empty empty empty

SUSTAIN 100KA 100KA 100KA 100KA 100KA 100KA 100KA 100KA

TONE 100KB 100KB 100KB 100KB 100KB 100KB 100KB 100KB

VOLUME 100KA 100KA 100KA 100KA 100KA 100KA 100KA 100KA

S IFT -------------------------Place jumper as shown on page 2-------------------------------

C1 1u

C2 470p

C3 1u

C4 1u

C5 470p

C6 1u

C7 100n

C8 470p

C9 1u

C10 3n9

C11 10n

C12 100n

C13 1u

C14 100u

Q1 MPSA18

Q2 MPSA18

Q3 MPSA18

Q4 MPSA18

D1 1N4148

D2 1N4148

D3 jumper

D4 1N4148

D5 1N4148

D6 empty

SUSTAIN 100kA

TONE 100kB

VOLUME 100kA

MIDS Jumper

R1 39k

R2 100K

R3 470K

R4 100R

R5 15K

R7 1K

R8 8K2

R9 100K

R10 470K

R11 15K

R12 100R

R13 8K2

R14 100R

R15 470K

R16 100K

R17 15K

R18 22K

R19 39K

R21 100K

R22 390K

R23 2K2

R24 10K

R25 1M

V3 79#2 - J Mascis

Based on what is supposedly one of J ascis’ favourite Fluffs.

The original has true tone bypass, but why would you want that?

C1 100n

C2 500p

C3 100n

C4 100n

C5 500p

C6 47n

C7 100n

C8 500p

C9 47n

C10 3n9

C11 10n

C12 100n

C13 100n

C14 100u

Q1 2N5089

Q2 2N5089

Q3 2N5089

Q4 2N5089

D1 1N4148

D2 1N4148

D3 empty

D4 1N4148

D5 1N4148

D6 empty

SUSTAIN 100kA

TONE 100kB

VOLUME 100kA

MIDS Jumper

R1 39k

R2 100K

R3 470K

R4 390R

R5 12K

R7 1K

R8 10K

R9 100K

R10 470K

R11 12K

R12 390R

R13 10K

R14 390R

R15 470K

R16 100K

R17 12K

R18 22K

R19 20K

R21 100K

R22 470K

R23 2K7

R24 10K

R25 1M

Tall Font Green Russian

Bass players’ favourite. The feedback caps in the original

are two 1nf in series, but that’s the same as 500pf.

C1 100n

C2 470p

C3 100n

C4 100n

C5 470p

C6 empty

C7 100n

C8 470p

C9 47n

C10 4n7

C11 10n

C12 100n

C13 100n

C14 100u

Q1 BC184

Q2 BC184

Q3 BC184

Q4 BC184

D1 empty

D2 empty

D3 empty

D4 1N4148

D5 1N4148

D6 empty

SUSTAIN 100kA

TONE 100kA

VOLUME 100kA

MIDS Jumper

R1 33k

R2 100K

R3 470K

R4 100R

R5 15K

R7 820R

R8 8K2

R9 100K

R10 470K

R11 10K

R12 100R

R13 8K2

R14 100R

R15 470K

R16 100K

R17 15K

R18 33K

R19 33K

R21 100K

R22 390K

R23 2K7

R24 10K

R25 1M

Csnd Supa Tonebender

‘73 UK interpretation. The first clipping stage is removed which

changes the sound to a mix of Tonebender-meets-Fluff. Heavy!

Transistor pinout is reversed so flip them. There was an extra cap

between the third gain stage and the tone section, but it’ll sound

just the same without it. If you want a 100% clone look elsewhere.

C10 4n7

C11 10n

C12 100n

C13 jumper

TONE 100kB

R7 1K

R18 39K

R19 39K

R2124 empty

Q4 No transistor 

jumper the base

and collector pads

as shown

Csnd Jumbo Tonebender

Based on the Supa, but the final gain recovery stage was removed giving

this much less gain and output level than its older brother. It has heavy

hints of BFP but has its own character. Great on bass. BO as above but

changes as shown below.

C1 100n

C2 470p

C3 100n

C4 100n

C5 470p

C6 100n

C7 100n

C8 470p (empty)

C9 100n

C10 6n8

C11 6n8

C12 100n

C13 100n

C14 100uSu

Q1 2N3904 (2N5089)

Q2 NPN Ge (MPSA18)

Q3 NPN Ge (MPSA18)

Q4 2N3904 (2N5089)

D1 3mm red led

D2 3mm red led

D3 empty

D4 3mm red led (1N4148)

D5 3mm red led (1N4148)

D6 empty

SUSTAIN 50KA

TONE 100KB

VOLUME 1MA

MIDS 25KB

R1 39K

R2 100K

R3 470K

R4 100R

R5 15K

R7 2K2

R8 8K2

R9 100K

R10 470K

R11 15K

R12 100R

R13 8K2

R14 100R

R15 470K

R16 100K

R17 15K

R18 2K2

R19 39K

R21 100K

R22 390K

R23 2K2

R24 10K

R25 1M

ooowwf (+Cloven variation)

Nice example of slight modifications to a BFP making a BIG difference to the

tone. The germanium cans and LED clipping make this a crunchier, grittier

experience - worth checking out even if you already have a BFP. Experiment

with NPN Ge cans in Q3-4. Original used 2N1308 - try AC176, AC127.

Substitute the parts shown in blue for the highter gain Cloven version.

C1 1u

C2 470p

C3 47n

C4 1u

C5 470p

C6 1u

C7 1u

C8 470p

C9 1u

C10 4n7

C11 10n

C12 100n

C13 100n

C14 100u

Q1 2N5089

Q2 2N5089

Q3 2N5089

Q4 2N5089

D1 1N4148

D2 1N4148

D3 empty

D4 1N4148

D5 1N4148

D6 empty

SUSTAIN 100kB

TONE 100kA

VOLUME 100kA

MIDS Jumper

R1 39k

R2 100K

R3 470K

R4 Jumper

R5 15K

R7 1K

R8 8K2

R9 100K

R10 470K

R11 15K

R12 Jumper

R13 8K2

R14 Jumper

R15 470K

R16 100K

R17 15K

R18 47K

R19 47K

R21 100K

R22 390K

R23 2K2

R24 10K

Creamy Dreamer

B&M Champion Fuzz Unit

Another vintage British interpretation, pretty much identical to

the Jumbo Tonebender. BC184C may be hard to come by, so try

others. Looking for around 600hFE in Q1 and Q2, 150hFE in Q3.

C1 100n

C2 560p

C3 100n

C4 100n

C5 560p

C6 1u

C7 100n

C8 560p

C9 1u

C10 4n7

C11 10n

C12 100n

C13 100n

C14 100u

C15 empty

C16 jumper

Q14 BC549C*

D12 1N4148

D3 empty

D45 1N4148

D6 empty

SUSTAIN 100KA

TONE 100KB

VOLUME 100KA

MIDS Jumper

R1 33K

R2 100K

R3 470K

R4 470R

R5 10K

R7 1K

R8 10K

R9 100K

R10 470K

R11 10K

R12 150R

R13 10K

R14 150R

R15 470K

R16 100K

R17 10K

R18 33K

R19 33K

R21 100K

R22 470K

R23 2K7

R24 10K

R25 1M

Stoned Cleric

Stoner heaven, based closely around a Ram’s Head 74#1 but with different

cans and a different emitter resistor in the first gain stage. Awesome stuff.

*BC549C pinout is the opposite to that shown on the PCB, so flip them.

C1 100n

C2 470p

C3 100n

C4 100n

C5 470p

C6 empty

C7 100n

C8 470p

C9 100n

C10 3n3

C11 10n

C12 100n

C13 jumper

C14 100u

Q1 BC184C

Q2 BC184C

Q3 BC184C

Q4 No transistor 

jumper Base & Coll.

D1 empty

D2 empty

D3 empty

D4 1N4148

D5 1N4148

D6 empty

SUSTAIN 100kB

TONE 100kA

VOLUME 100kA

MIDS Jumper

R1 39k

R2 100K

R3 470K

R4 100R

R5 10K

R7 1K

R8 10K

R9 100K

R10 470K

R11 10K

R12 100R

R13 10K

R14 100R

R15 470K

R16 100K

R17 15K

R18 39K

R19 39K

R2124 empty

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