Akashic Guitar effects circuit lookup
BASSMASTERMIDVOLTREB

1590BBS · 5 knobs

Dead End FX

Dekadent

Category
Preamp / Amp-in-a-box· Preamp
Controls
Bass · Master · Mid · Vol · Treb
Price
$15.00in stock

From the vendor

Just the preamp section of the now redonkulously priced (and hard to find!) Peavey Decade mini amp. Ever since the news came out that it was QOTSA "secret sauce", everybody wants one. Including St. Vincent, so she had one made into a pedal. We don't believe that one person should have that much fun, so we a made a board of just the preamp section. Runs on a normal 9VDC adapter, but thanks to a charge pump, we've retained the 24VDC circuit voltage, like the original, for max headroom. Toggle switch selects between clean or overdrive. Nice little tone generator.

Please note that this project uses the Coda silent relay switching bypass. A preprogrammed PIC chip will be required. The preprogrammed PIC chip is available here; http://www.deadendfx.com/product/coda-bypass-pic

Schematic

The schematic is in the vendor's build document, page 4. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 80 rows

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ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.

RefValueNormalizedTypeNotes
Resistors 28
R110ksch10k
R21ksch1k
R31k5sch1.5k
R410ksch10k
R6220ksch220k
R7220ksch220k
R81ksch1k
R9220ksch220k
R101ksch1k
R1133ksch33k
R122k7sch2.7k
R1310ksch10k
R146k8sch6.8k
R151ksch1k
R162k7sch2.7k
R17680rsch680
R184k7sch4.7k
R1947ksch47k
R201ksch1k
R214k7sch4.7k
R2247rsch47
R2347ksch47k
R2410ksch10k
R25470ksch470k
R2633ksch33k
R2710ksch10k
R281ksch1k
R2922ksch22k
Capacitors 27
C1100psch100p
C2100psch100p
C310usch10u
C410usch10u
C8100nsch100n
C9100psch100p
C11100nsch100n
C12100nsch100n
C13100psch100p
C146n8sch6.8n
C1822nsch22n
C21270psch270p
C2233nsch33n
C23100nsch100n
C2415nsch15n
C25100nsch100n
C26100psch100p
C15470nocr470n
C162u2ocr2.2u
C172u2ocr2.2u
C1922uocr22u
C20470uocr470u
C272u2ocr2.2u
C282u2ocr2.2u
C510uocr10u
C610uocr10u
C1010uocr10u
Diodes 14
D21n5817sch1N5817
D31n4001sch1N4001
D41n4001sch1N4001
D51n4001sch1N4001
D61n4001sch1N4001
D71n4148sch1N4148
D81n4148sch1N4148
D91n4148sch1N4148
D101n4148sch1N4148
D111n4148sch1N4148
D121n4148sch1N4148
D131n4148sch1N4148
D141n4148sch1N4148
D151N4148ocr1N4148
Transistors 1
Q1MPSA18ocrMPSA18
ICs 3
IC1pic12f675schPIC12F675
IC3LT1054ocrLT1054
IC44558ocr4558
Potentiometers 5
BassA250KschA250kPotentiometer
MasterB10KschB10kPotentiometer
MidB50KschB50kPotentiometer
VolB10KschB10kPotentiometer
TREBB250KocrB250kPotentiometer
Switches 2
SWSPDTocrSPDT
MomentarySPSTocrSPST