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DISTFILTERLEVEL

Enclosure not stated · 3 knobs

PCBWay: Glory to Ukraine

Rat Distortion

Based on the ProCo RAT· 41 other boards clone it

Category
Distortion
Controls
Dist · Filter · Level
Price
see vendorin stock
Tags
ProCo, ProCo, Guitar pedal, Distortion, ProCo, RAT
Order the board at PCBWay Schematic image (CC BY-SA)

From the vendor

The Pro Co Rat is a distortion pedal by Pro Co Sound designed by Scott Burnham and Steve Kiraly in Kalamazoo, Michigan 1978. The original circuit and appearance suffered some changes over the different revisions but the tone remained the same.

Schematic

The schematic image is on the project page. Open it at PCBWay.

Parts list 28 rows

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RefValueNormalizedTypeNotes
Resistors 8
×31M1Minput pulldown, input bias (4.5V), JFET gate; read from the schematic by eye
×21k1kinput series; after op amp; read from the schematic by eye
×24747power filter; gain leg with 2u2; read from the schematic by eye
×1560560gain leg with 4u7; read from the schematic by eye
×14k74.7kLED current limit; read from the schematic by eye
×2100k100k4.5V bias divider; read from the schematic by eye
×11k51.5kfilter; read from the schematic by eye
×110k10kJFET source; read from the schematic by eye
Capacitors 12
×222n22ninput; JFET coupling; read from the schematic by eye
×11n1ninput to ground; read from the schematic by eye
×12u22.2uelectrolytic, gain leg; read from the schematic by eye
×24u74.7uelectrolytic, gain leg and op amp output; read from the schematic by eye
×1100p100pfeedback; read from the schematic by eye
×130p30pLM308 compensation (pins 1-8); read from the schematic by eye
×13n33.3nfilter; read from the schematic by eye
×11u1uelectrolytic, output; read from the schematic by eye
×1100u100uelectrolytic, 9V supply; read from the schematic by eye
×1100n100n9V supply; read from the schematic by eye
×147u47uelectrolytic, 4.5V reference; read from the schematic by eye
×110n10n4.5V reference; read from the schematic by eye
Diodes 2
×11N40011N4001power; read from the schematic by eye
×21N9141N914clipping; read from the schematic by eye
Transistors 1
×12N54582N5458JFET output buffer; read from the schematic by eye
ICs 1
×1LM308LM308layout prints LM308N; read from the schematic by eye
Potentiometers 3
DistA100kA100kPotentiometerread from the schematic by eye
FilterA100kA100kPotentiometerread from the schematic by eye
LevelA100kA100kPotentiometerVolume on the layout; read from the schematic by eye
LEDs 1
×1LEDLEDoff-board, via LED pad; read from the schematic by eye

Other boards based on the ProCo RAT