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CLIPCRUNCHFILTERSCOOPSUSTAINVOICEVOL

1590BB · 7 knobs

Fuzz Dog· EnGherk

Engorged Gherkin Fuzz

Based on the Swollen Pickle

Category
Fuzz
Controls
Clip · Crunch · Filter · Scoop · Sustain · Voice · Vol
Difficulty
Medium
Price
£43.20
Tags
fuzz

From the vendor

This was going to be called the Ultra-mega Overly Engorged Gherkin, but that's a bit of a mouthful. This is based on Mk II of a very popular, highly tweakable Big Muff derivative. One problem with the original is a couple of silly little 6mm pot shafts for a couple of the controls, making precise adjustment a pain. Second problem is another two of the controls are internal trimmers. Not much of a control.... So we've been thinking outside the box and put everything outside the box. Seven - yes, seven! - controls on a Big Muff. None of them are superficial either. As well as your normal Volume, Sustain and Filter we have: • Clip - blends between two different sets of clipping diodes on the second gain stage, which has a very noticeable outcome on the nature of the fuzz • Voice - adjusts the intensity of the scoop control, from mild to major mids cut. • Scoop - hey, we're in Big Muff land - you know what this does. • Crunch - adjusts how much clipping goes on in the third gain stage, doing exactly what it says - adding a crunch element to the smooth fuzz. All in all, well worth the extra pedalboard estate for the 1590BB box this kit requires. Kit is supplied with the MPQ3904 quad BJT chip (while stocks last) found in the original unit, but you can use four transistors instead if you prefer. The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. Tightest pot spacing is 20mm. If you want the PCB without parts there's a link for that at the bottom of the page. Partial kit: PCB, all board-mounted components, pots. Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED. Enclosure (pre-drilled) is available as an option with full kits, and will not take a battery. Knobs are not included. Builds are only available with full kits including enclosures. Please choose appropriate knobs. Inspired by: Swollen Pickle Difficulty: Medium PCB size: 80 x 40mm Knobs required: 7 Enclosure: 1590BB Direct Connect compatible (4-way) Download the INSTRUCTION PDF

Schematic

The schematic is in the vendor's build document, page 2. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 67 rows

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RefValueNormalizedTypeNotes
Resistors 28
R133K33k
R2100K100k
R3470K470k
R4100R100
R510K10k
R64K74.7k
R71K1k
R810K10k
R9100K100k
R10470K470k
R114K74.7k
R12100R100
R1310K10k
R1410K10k
R15470K470k
R16100K100k
R17100R100
R1810K10k
R194K74.7k
R2033K33k
R211K51.5k
R22470K470k
R23100K100k
R2410K10k
R251K51.5k
R26150R150
R2710R10
R292K22.2k
Capacitors 20
C1100n100n
C2470p470p
C31u1uelec
C41u1uelec
C51u1uelec
C6100n100n
C747n47n
C8470p470p
C91u1uelec
C101u1uelec
C11470p470p
C12100n100n
C131u1uelec
C141u1uelec
C153n33.3n
C1633n33n
C17100n100n
C181u1uelec
C1947u47uelec
C20100u100uelec
Diodes 7
D11N41481N4148
D21N41481N4148
D33MM3MM
D43MM3MM
D51N41481N4148
D61N41481N4148
D71N40011N4001
Transistors 4
Q12N39042N3904
Q22N39042N3904
Q32N39042N3904
Q42N39042N3904
ICs 1
IC1MPQ3904**MPQ3904
Potentiometers 7
CLIP500KBB500kPotentiometer
CRUNCH500KAA500kPotentiometer
FILTER100KBB100kPotentiometer
SCOOP50KBB50kPotentiometer
SUSTAIN100KBB100kPotentiometer
VOICE500KBB500kPotentiometer
VOL100KBB100kPotentiometer