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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

Summary of Contents for Big Fluff Pie

Page 1: ...g Fluff Pie Everyone loves a big chunk of fluff Contents of this document are 2018 Pedal Parts Ltd No reproduction permitted without the express written permission of Pedal Parts Ltd All rights reserv...

Page 2: ...ise 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 b...

Page 3: ...s SW1 D3 and D6 are only used if you want altertive clipping selection If you aren t including this place a jumper in either spot shown in BLUE below SHIFT is only included if you re using an alternat...

Page 4: ...clude 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 ne...

Page 5: ...ggle switch in SW1 or SW2 to select between the two sets of clipping D4 D5 D3 D6 If you want to get really freaky you can use a SPDT ON OFF ON switch which will remove the clipping from that gain stag...

Page 6: ...00p 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 100...

Page 7: ...edly one of J Mascis 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 1...

Page 8: ...rst 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 to...

Page 9: ...ons 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...

Page 10: ...R16 100K R17 10K R18 33K R19 33K R21 100K R22 470K R23 2K7 R24 10K R25 1M StonedCleric Stoner heaven based closely around a Ram s Head 74 1 but with different cans and a different emitter resistor in...

Page 11: ...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 t...

Page 12: ...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...

Page 13: ...nclosure before drilling You use this template at your own risk Pedal Parts Ltd can accept no responsibility for incorrect drilling of enclosures Drilling template Hammond 1590B 60 x 111 x 31mm Recomm...

Page 14: ...e before drilling You use this template at your own risk Pedal Parts Ltd can accept no responsibility for incorrect drilling of enclosures FuzzDog co uk Drilling template Hammond 1590B 60 x 111 x 31mm...

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