Akashic Guitar effects circuit lookup
DISTORTIONTONELEVEL

Enclosure not stated · 3 knobs

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Ibanez OD855 Overdrive 2

Category
Overdrive
Controls
Distortion · Tone · Level
Price
see vendorin stock

From the vendor

The Ibanez OD-855 Overdrive II was first made in the mid-1970s and was a precursor to the TS808 Tube Screamer. It features controls for Tone, Level, and Distortion.

!PS The distortion regulator may not be connected correctly, I have not found any schemes with the location of the direction of rotation. But tagboardeffects connected to 3 output...

Schematic

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

Parts list 27 rows

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Check before you build · 2 values the reader of this schematic was not sure of
  • Source image is only 600x300 px: 680 resistor (top of tone network), 20n input cap, 30p feedback cap and pot values B20k/B10k read at low resolution
  • Distortion C50k marked with '?' by the drawer
RefValueNormalizedTypeNotes
Resistors 9
×710k10kread from the schematic by eye
×33k3kread from the schematic by eye
×2510k510kread from the schematic by eye
×2100k100kread from the schematic by eye
×1680680label low-res, could be 680 or 480; read from the schematic by eye
×1470470read from the schematic by eye
×1100100read from the schematic by eye
×14747read from the schematic by eye
×14k74.7kLED resistor; read from the schematic by eye
Capacitors 11
×21u1uread from the schematic by eye
×2100n100nread from the schematic by eye
×120n20nlow-res label; read from the schematic by eye
×1470p470pread from the schematic by eye
×1470n470nread from the schematic by eye
×130p30plow-res label; read from the schematic by eye
×11n1nread from the schematic by eye
×14u74.7uelectrolytic; read from the schematic by eye
×110u10uelectrolytic; read from the schematic by eye
×1100u100uelectrolytic; read from the schematic by eye
×147u47uelectrolytic; read from the schematic by eye
Diodes 2
×21N601N60clipping; read from the schematic by eye
×11N40011N4001read from the schematic by eye
Transistors 1
×22SC1815BL2SC1815BLread from the schematic by eye
ICs 1
×145584558dual op-amp, both sections used; read from the schematic by eye
Potentiometers 3
DistortionC50kC50kPotentiometerdrawn with a '?' beside it on the sheet; read from the schematic by eye
ToneB20kB20kPotentiometerread from the schematic by eye
LevelB10kB10kPotentiometerread from the schematic by eye