Akashic Guitar effects circuit lookup
GAINFILTERLEVEL

Enclosure not stated · 3 knobs

Experimentalists Anonymous

Proco Rat

Based on the ProCo RAT· 41 other boards clone it

Category
Distortion· Distortion Boost and Overdrive
Controls
Gain · Filter · Level
Price
see vendor
Tags
Distortion Boost and Overdrive
Open the schematic at Experimentalists Anonymous

Schematic

The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.

Parts list 28 rows

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RefValueNormalizedTypeNotes
Resistors 10
×12M22.2Minput pulldown; read from the schematic by eye
×21M1Mop-amp input bias to VBIAS; JFET buffer gate to ground; read from the schematic by eye
×21k1kop-amp input series; op-amp output series; read from the schematic by eye
×11k61.6kafter Filter pot; read from the schematic by eye
×210k10kJFET buffer source; output pulldown; read from the schematic by eye
×122M22Mbypass-LED JFET gate; read from the schematic by eye
×12k22.2kLED; read from the schematic by eye
×247E4747 ohm: supply series; gain leg; read from the schematic by eye
×1360E360360 ohm, gain leg; read from the schematic by eye
×2100k100kVBIAS divider; read from the schematic by eye
Capacitors 10
×222n22ninput coupling; before JFET buffer; read from the schematic by eye
×11n1nop-amp input to ground; read from the schematic by eye
×110n10nLM308 supply bypass; read from the schematic by eye
×130p30pLM308 compensation (pins 1-8); read from the schematic by eye
×1100p100pop-amp feedback; read from the schematic by eye
×24u74.7ugain leg; output coupling; read from the schematic by eye
×12u22.2ugain leg; read from the schematic by eye
×13n33.3nfilter; read from the schematic by eye
×21u1ubuffer output coupling; VBIAS filter; read from the schematic by eye
×1100u100usupply filter; read from the schematic by eye
Diodes 2
×4SiSIsilicon diodes, no part number given: two clipping diodes to ground, two in series with the bypass LED; read from the schematic by eye
×11N40011N4001polarity protection; read from the schematic by eye
Transistors 1
×22N54582N5458JFET output buffer and bypass-LED switch; read from the schematic by eye
ICs 1
×1LM308LM308read from the schematic by eye
Potentiometers 3
GainA150kA150kPotentiometer150k log; read from the schematic by eye
FilterA100kA100kPotentiometer100 k log; read from the schematic by eye
LevelA100kA100kPotentiometer100 k log; read from the schematic by eye
LEDs 1
×1LEDLEDbypass LED; read from the schematic by eye

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