Akashic Guitar effects circuit lookup
FINEGAINOFSTONEVOL

1590B · 5 knobs

Fuzz Dog· moonrock

Moonrock

Based on the Wyllie Moonrock / Coyote

Category
Fuzz
Controls
Fine · Gain · Ofs · Tone · Vol
Difficulty
Medium
Price
£38.40
Tags
fuzz

From the vendor

Legendary fuzz box by G.S. Wyllie, recently back in the spotlight thanks to the JHS Coyote.

Their take is pretty much a 1:1 with the original two-knob circuit, which you can build if you want. However, we'd recommend going for the full-fat version with tweaks and improvements by Cozybuilder at DiyStompBoxes.com, and incorporated in the Moonstone by DeadEndFX.

The basic box has Volume and Swell/Fuzz/Octave knobs. The latter is where the fun is. At low settings you have various degrees of swell control, from a slow build from silence to sound when you hit the strings. Further up and you have immediate fuzz with no swell. More and you have octave'up fuzz.

Go for the five-knob + toggle version to add a tone control, a fine tuning knob to tweak the swell attack, and a gain control rather than fixed fuzz amount. The toggle switches the swell on/off. We've ditched the Hi/Lo gain toggle to keep the control layout tasty. If you want lower gain, turn the knob down!

Designed for tiny, fiddly 3mm resistors which are super-neat, or you can go for standard 6mm if you're happy to mount them vertically. The codes are much easier to read on those.

The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. Pot spacing is 17.5mm so small knobs are a must.

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 (depending on selected options), 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 enclosure and vertical-mount pots. Please choose appropriate knobs.

Inspired by: Wyllie Moonrock / Coyote

Difficulty: Medium

PCB size: 50 x 50mm

Knobs required: 5

Enclosure: 1590B

Direct-Connect compatible (4-way)

Download the INSTRUCTION PDF

Schematic

The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 58 rows

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Variant
RefValueNormalizedTypeNotes
Resistors 20
R12M22.2M
R22K22.2k
R3220K220k
R468K68k
R61M1M
R7130K130k
R81M1M
R915K15k
R1018K18k
R1127K27k
R1227K27k
R13130K130k
R141M1M
R1568K68k
R168K28.2k
R1747K47k
R18100K100k
R19100K100k
R204M74.7M
R212K22.2k
Capacitors 15
C110u10uElectrolytic capacitor
C210u10uElectrolytic capacitor
C310u10uElectrolytic capacitor
C410u10uElectrolytic capacitor
C510u10uElectrolytic capacitor
C610u10uElectrolytic capacitor
C7100u100uElectrolytic capacitor
C833n33n
C9100n100n
C1010n10n
C1110n10n
C12100n100n
C13100n100n
C14100u100uElectrolytic capacitor
C154u74.7uElectrolytic capacitor
Diodes 13
D11N41481N4148
D21N41481N4148
D31N41481N4148
D41N41481N4148
D51N41481N4148
D61N41481N4148
D71N41481N4148
D81N41481N4148
D91N41481N4148
D101N41481N4148
D111N41481N4148
D121N41481N4148
D131N58171N5817
Transistors 4
Q12N39042N3904
Q2BC547BBC547B
Q32N39042N3904
Q42N39042N3904
Potentiometers 5
FINE25KBB25kPotentiometer
GAIN10KCC10kPotentiometer
OFS1MAA1MPotentiometer
TONE100KBB100kPotentiometer
VOL250KAA250kPotentiometer
Switches 1
SWELLSPDT ON-ONSPDT ON-ON