Akashic Guitar effects circuit lookup
MID BOOSTDRIVETONELEVEL

Enclosure not stated · 4 knobs

Dirtbox Layouts

Ibanez ST-9 Super Tube Screamer w. Aion "Cirrus mod"

Based on the Ibanez Tube Screamer· 34 other boards clone it

Category
Overdrive
Controls
Mid Boost · Drive · Tone · Level
Build
Vero· 18×19· 24 cuts, 11 links
Layout
Unverified · no build reported at Dirtbox Layouts yet
Tags
Ibanez, Overdrive
Open the layout at Dirtbox Layouts

From the post

Unverified

One of the better TS variants according most TS lovers. Original had a 20kC dual gang pot for the Mid Boost control and since these are nearly impossible to source this layout has Mid Boost section modified (lifted from Aion Electronics Cirrus project) to use a 100kC dual gang pot which is readily avaiable.

But if you happen to sit on a 20kC dual gang pot you can swap both 7,5 resistors to 1,5k, 5,6nF cap to 27nF and 12nF cap to 68nF.

More information including schematic HERE

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 30 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 1K at column 17, rows B-D: half hidden under the 100uF electrolytic, only '1K' partly visible
  • Tone pot printed 20kW (W taper), kept as W20K
RefValueNormalizedTypeNotes
Resistors 10
×610K10kread from the layout by eye
×41K1kread from the layout by eye
×27.5K7.5kread from the layout by eye
×2510K510kread from the layout by eye
×14.7K4.7kread from the layout by eye
×151K51kread from the layout by eye
×1220K220kread from the layout by eye
×12.2M2.2Mread from the layout by eye
×1220Ω220read from the layout by eye
×1470Ω470read from the layout by eye
Capacitors 10
×247nF47nread from the layout by eye
×31uF1ufilm; read from the layout by eye
×2100nF100nread from the layout by eye
×1220nF220nread from the layout by eye
×15.6nF5.6nread from the layout by eye
×112nF12nread from the layout by eye
×151pF51pread from the layout by eye
×147uF47uelectrolytic; read from the layout by eye
×1100uF100uelectrolytic; read from the layout by eye
×110uF10uelectrolytic; read from the layout by eye
Diodes 3
D11N9141N914legend: 1N914/1N4148; read from the layout by eye
D21N9141N914legend: 1N914/1N4148; read from the layout by eye
D31N58171N5817read from the layout by eye
Transistors 1
Q12N50882N5088legend: 2N5088, 2N3904 etc.; read from the layout by eye
ICs 2
IC1JRC4558DJRC4558Dread from the layout by eye
IC2JRC4558DJRC4558Dread from the layout by eye
Potentiometers 4
Mid BoostC100KC100kPotentiometerdual; read from the layout by eye
DriveA500KA500kPotentiometerread from the layout by eye
ToneW20KW20kPotentiometerW taper; read from the layout by eye
LevelB100KB100kPotentiometerread from the layout by eye

Other boards based on the Ibanez Tube Screamer