Akashic Guitar effects circuit lookup
TREBLEBASSDISTORTIONVOLUME

Enclosure not stated · 4 knobs

Dirtbox Layouts

Proco Rat / Fuzzhead Fx Green Lemming DistortionVerified

Based on the ProCo RAT· 41 other boards clone it

Category
Distortion
Controls
Treble · Bass · Distortion · Volume
Build
Vero· 19×18· 23 cuts, 9 links
Layout
Verified · Dirtbox Layouts marks it as built and working
Tags
Distortion, Fuzzhead Fx, ProCo
Open the layout at Dirtbox Layouts

From the post

Something like this have probably been done before... Yes, Fuzzdog added a 3-band Marshall style tonestack to a Rat a while ago. Oh, and there is Idiotbox Blowerbox, a Rat tuned for bass with less gain with a James tonestack.... This one is quite similar to the latter but has more gain on tap and are tuned for guitar. The James tonestack have Matamp/Orange values but can be tweaked witch Duncan Tonestack calculator. Oh, and there is a diode switch for assymetric SI/MOSFET clipping and symmetrical LED clipping.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.

Parts list 37 rows

Report a wrong parse

Got parts in a drawer? See what you can build with them.

RefValueNormalizedTypeNotes
Resistors 9
×147Ω47read from the layout by eye
×1560Ω560read from the layout by eye
×110Ω10read from the layout by eye
×21K1kread from the layout by eye
×11.5K1.5kread from the layout by eye
×210K10kread from the layout by eye
×127K27kread from the layout by eye
×2100K100kread from the layout by eye
×31M1Mread from the layout by eye
Capacitors 15
×133pF33pread from the layout by eye
×1100pF100pread from the layout by eye
×1150pF150pread from the layout by eye
×1330pF330pread from the layout by eye
×11nF1nread from the layout by eye
×22.2nF2.2nread from the layout by eye
×110nF10nread from the layout by eye
×122nF22nread from the layout by eye
×133nF33nread from the layout by eye
×1100nF100nread from the layout by eye
×11uF1ufilm; read from the layout by eye
×12.2uF2.2uelectrolytic; read from the layout by eye
×34.7uF4.7uelectrolytic; read from the layout by eye
×147uF47uelectrolytic; read from the layout by eye
×1100uF100uelectrolytic; read from the layout by eye
Diodes 2
D11N40011N4001read from the layout by eye
D41N58171N5817read from the layout by eye
Transistors 2
Q1PF5102PF5102JFET; legend: PF5102/J201; read from the layout by eye
Q2BS170BS170MOSFET; read from the layout by eye
ICs 1
IC1LM308LM308read from the layout by eye
Potentiometers 4
TrebleB1MB1MPotentiometerread from the layout by eye
BassB1MB1MPotentiometerread from the layout by eye
DistortionA100KA100kPotentiometerread from the layout by eye
VolumeA100KA100kPotentiometerread from the layout by eye
Trimmers 2
Bias20K20kread from the layout by eye
Reutz1K1kread from the layout by eye
Switches 1
SwitchSPDT on/onSPDT ON/ONtoggle; read from the layout by eye
LEDs 1
×23mm red LED3MM RED LEDD2, D3; read from the layout by eye

Other boards based on the ProCo RAT