Akashic Guitar effects circuit lookup
ATTACKLEVELBIAS

Enclosure not stated · 3 knobs

GuitarPCB

P.U.T.B.

Category
Fuzz
Controls
Attack · Level · Bias
Price
$3.95in stock
Tags
sale

From the vendor

The Best Tonebender PCB with a Modern Twist. Works with other negative-ground pedals.

Description

This is the Classic Tonebender with a modern twist. Pump’d Up means you can use this circuit with other negative-ground pedals. Since the power section has no effect on the Audio Path, utilizing a Charge Pump to invert to a modern negative ground circuit will not affect the tone of an original Tonebender. This will allow you to daisy chain or use it in a combo build.

Because many old PNP fuzz pedals tend to be positive-ground circuits, they must have a separate power supply from the rest of your effects in a chain. To overcome this limitation, a charge pump chip has been integrated to invert the power to a negative ground circuit allowing it to be powered by the same source as all of your other effects with ZERO effect on tone!

PUTB Pump’d Up ToneBender Build Document

Note: You may also use TC1044SCPA or TC1044SEPA Charge Pumps. As long a the “S” is after the 1044.

See video below demonstrating three of our popular Pump’d Up circuits with PUTB at the end.

Schematic

The schematic is in the vendor's build document, page 2. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 30 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 10
R11M1M
R2100K100k
R310K10k
R4100K100k
R5100K100k
R6470R470
R71M1M
R81k81.8k
R22100Kocr100k
R9470Rocr470
Capacitors 11
C24u74.7u
C1247u47u
C3220p220p
C5100n100n
C6220p220p
C7220p220p
C84u74.7u
C910n10n
C1047u47u
C110n10n
C1110u10u
Diodes 1
D11n58171N5817
Transistors 3
Q1GeGE
Q2GeGE
Q3GeGE
ICs 1
IC17660S7660S
Potentiometers 3
ATTACKB1KB1kPotentiometer
LEVELA100KA100kPotentiometer
BIAS20K20kPotentiometer
LEDs 1
D2Status LEDSTATUS LED