Akashic Guitar effects circuit lookup
DRIVELEVELTONETUBE

1590BBS · 4 knobs

Dead End FX

Cheerio

Based on the Maxon TOD-9

Category
Overdrive
Controls
Drive · Level · Tone · Tube
Price
$20.00in stock

From the vendor

Cheerio. The term used in New Zealand for a small sausage, which is what the 5703WB tube used in this project reminds us of. It's also what you'll be saying to a lot of your other overdrive pedals once you start using this one. Cheerio!

Based on the Maxon TOD-9 "Real Tube" Tubescreamer, we've made some big changes to the power section in this one. The Maxon not only uses a hefty 9VDC/2.2A (yikes!) power supply ( as big as ones used for laptops), but also some fairly exotic chips for the 30v and 6v supplies internally. Yes... you read right. 30v. This one has headroom for days. Our version retains all the same audio landscape, but requires a 12VAC/800mA (or better) power supply. These are usually quite cheap, and easy to find. An LT1054 is used for the boosting to 30v. The tube is first in line, pushing all the TS stuff downstream. The result is buttery smooth tone, that can also be very touch sensitive in the right hands. It can do subtle boost, all out crunch, and all points in between. Cheerio mate!

Schematic

The schematic is in the vendor's build document, page 11. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 73 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 24
R41k5sch1.5k
R5510ksch510k
R610ksch10k
R74k7sch4.7k
R84k7sch4.7k
R91Msch1M
R1010ksch10k
R1127ksch27k
R12120ksch120k
R1350ksch50k
R14470rsch470
R15510rsch510
R161ksch1k
R17220rsch220
R181ksch1k
R191ksch1k
R201ksch1k
R21100ksch100k
R22100ksch100k
R23100ksch100k
R241ksch1k
R110rocr10
R210kocr10k
R310kocr10k
Capacitors 33
C1100nsch100n
C3100nsch100n
C9100usch100u
C10100usch100u
C11100usch100u
C18100nsch100n
C19100nsch100n
C2047nsch47n
C21220nsch220n
C22100nsch100n
C2347usch47u
C241usch1u
C25470nsch470n
C26470nsch470n
C27100psch100p
C28220nsch220n
C29220nsch220n
C301usch1u
C311usch1u
C3222psch22p
C331usch1u
C2100nocr100n
C4100nocr100n
C5100uocr100u
C6220uocr220u
C7100nocr100n
C8100nocr100n
C12100uocr100u
C13220uocr220u
C14100uocr100u
C1547uocr47u
C16100nocr100n
C17100nocr100n
Diodes 6
D11N4001sch1N4001
D21N4001sch1N4001
D31N4001sch1N4001
D41N4001sch1N4001
D71n4148sch1N4148
D81n4148sch1N4148
Transistors 2
Q12sk381sch2SK381
Q22sk381sch2SK381
ICs 3
IC1LT1054ocrLT1054
IC24558Docr4558D
IC34558Docr4558D
Potentiometers 4
DriveB50KschB50kPotentiometer
LevelB100KschB100kPotentiometer
ToneW20KschW20kPotentiometer
TubeA100KschA100kPotentiometer
Switches 1
Bypass3PDTocr3PDT