FuzzDog FuzzPup Big Muff Pi Operating instructions

Brand
FuzzDog
Model
FuzzPup Big Muff Pi
Type
Operating instructions
Big Fluff
The daddy of all fuzz
in a baby box
Contents of this document are ©2018 Pedal Parts Ltd.
No reproduction permitted without the express written
permission of Pedal Parts Ltd. All rights reserved.
FuzzPup
IMPORTANT
Before you start...
Grab the general build doc that covers all FuzzPup builds. Most of
the information you need for this build is in there.
Read it? OK, carry on.
FuzzPups
Lovely little boxes of joy with a
totally standardised build pattern
Contents of this document are ©2016 Pedal Parts Ltd.
No reproduction permitted without the express written
permission of Pedal Parts Ltd. All rights reserved.
Schematic
The PCB is designed to take 1/8W (0.125W) resistors. You can use 1/4W if you
wish, but you’ll have to position them upright. Make sure they’re bent enough
that you’ll have plenty of clearance in your enclosure. But really, get some 1/8W.
NOTE: C14 is for power filtering and doesn’t go on the PCB. If you want to
include it you’ll have to add it to the daughterboard or the DC socket as detailed
later in this document.
THAT SCOOPED MID-RANGE - NOTHANKS!
The Big Fluff Pie has a distinctive scooped mid-range. In most cases this can be
flattened out if desired. For the main BFP variations listed in the first BOM page,
this can be achieved by changing R18 and R19 to 39K, and C10 to 10n.
PCB layout ©2018 FuzzDog
Unlike most of our FuzzPup PCBs the MiniFluff doesn’t have pads for the jack
connections. You have to use to daughterboard for those. It’s also a little wider at
30mm, so there’s not so much room for wire access once it’s built.
Green Black Civil War 73#18 Violet NYC
BOM 3rd (70s) Russian Russian Russian Triangle Ram Head Ram Head 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 100K 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
R26 2K2 2K2 2K2 2K2 2K2 2K2 2K2 2K2
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
D4 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148
D5 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148
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
Main Variations
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 1N4148/1N914
D2 1N4148/1N914
D4 1N4148/1N914
D5 1N4148/1N914
SUSTAIN 100kA
TONE 100kB
VOLUME 100kA
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 Mascis’ favourite Fluffs.
The original has true tone bypass which can be ‘hacked’ as
detailed later in the document.
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 1N4148/1N914
D2 1N4148/1N914
D4 1N4148/1N914
D5 1N4148/1N914
SUSTAIN 100kA
TONE 100kB
VOLUME 100kA
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 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
D4 1N4148
D5 1N4148
SUSTAIN 100kB
TONE 100kA
VOLUME 100kA
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
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
Q14 BC549C*
D12 1N4148
D45 1N4148
SUSTAIN 100KA
TONE 100KB
VOLUME 100KA
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.
Wire up your pots
If you’re using the pot daughterboard you need to allow some slack in the wires
attaching it to the main PCB. About an inch is a good length. We recommend
wiring on the top side of the main PCB rather than underneath as it’s easier to
guide the wires on final assembly, and they’re less likely to get snagged up under
the boards.
If you have the means to strip ribbon cable this can make a really neat finish rather
than individual wires.
C14 - Power filtering if you want it
There wasn’t room for C14 on the PCB, but you can easily add it if you want to
include the power filtering.
If you’ve gone for a top-mounted DC socket
you can use the spare power pads on
the daughterboard. Solder it in as shown,
anode(+) to V, cathode to G. >>>>
If you’re using a side-mounted
DC socket you can utilise the pads
at the top of the main PCB as below,
or solder it straight to the pins of the DC socket.
Assembly #1
This is where the *fun* starts. As this PCB is slightly different to our normal
FuzzPup range in not having jack connections and being a bit wider, you need to
take a little more care with assembly.
Get your hardware in place in the enclosure and wire it up, leaving plenty of slack
where it’ll join the daughterboard. Once you start soldering that it can get very
awkward if your wires are too short.
Run the wires under the jacks. You don’t want them getting in the way when you
place the main PCB.
Assembly #2
Now attach the wires to the daughterboard. Don’t forget your current limiting
resistor. Push the LED into its pads in the board and bend the legs out slightly to
keep in in place. You’ll push this through into final position once the board is
soldered to the footswitch.
If you have a top-edge DC socket don’t bother with the power GND and 9V wires on
the daughtboard. These will attach to the main PCB.
Assembly #3
Now for the fiddly bit.
Put your pots into position. No need to tighten them up yet, but no harm if you do.
Locate the header pins on the main PCB into the CI, V, G, CO pads on the
daughterboard and bring both boards down into the enclosure. Keep an eye on the
wiring and make sure nothing is snagging, and that your Jack Out wire won’t
interfere with the LED.
Locate the daughterboard onto the switch lugs, ensuring your main PCB clears the
edge of the switch. Hopefully you’ve read the main FuzzPup document and have
soldered the header pins at an angle to make this easier.
Now everything should just relax down into position. Once you’re happy with where
the boards are you can solder the headers and footswitch into place.
Once that’s all done you can push your LED down into its hole and finish up.
...and BOOM!
Hopefully not literally.
One fully assembled mini Big Fluff.
If you have a top-mounted DC socket get it in there and wire it up with the V and G
pads in the top corners of the main PCB.
Enjoy!
FuzzDog.co.uk
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FuzzDog FuzzPup Big Muff Pi Operating instructions

Brand
FuzzDog
Model
FuzzPup Big Muff Pi
Type
Operating instructions
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