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BASSMIDSTREBLEVOLUMEPRESENCEDEEPMID

Enclosure not stated · 7 knobs

PCB Guitar Mania

Amp Tone Stack + Gain Recovery

Based on the Friedman BE-OD· 7 other boards clone it

Category
Preamp / Amp-in-a-box· Pedal Development Tool
Controls
Bass · Mids · Treble · Volume · Presence · Deep · Mid
Difficulty
Advanced
Price
€7.90out of stock

Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.

From the vendor

Project overview

Would you like to take a more classic, and amp alike approach to your build? Just add this EQ section to it!

Introduction

Recreates the 3 bands tone stack in the same way as it’s on tube amplifier and on many other famous amp in a box pedals (Catalinbread dirty little secret). This board allows you to experiment with different values in order to get different tone responses based on many classic amps.

Following the tone section, we have an external Presence control that follows the same amp a like logic. As usually, this tone stacks suck a lot of volume and gain, we have included at last one gain recovery stage. If you want to go with a more vintage approach you can easily bypass this last section.

Controls

• Bass

• Mid

• Pres

• Treble

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

EQ Development-tool – Building Docs

Amp Tone Stack + Gain Recovery – Building Docs

Amp Tone Stack + Gain Recovery – Drilling template

Schematic

The schematic is in the vendor's build document, page 6. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 51 rows

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RefValueNormalizedTypeNotes
Resistors 19
R12K22.2k
R233K33k
R333K33k
R42K22.2k
R5470K470k
R62K22.2k
R72k22.2k
R822K22k
R9100K100k
R102K22.2k
R11150k150k
R12100k100k
R1320K20k
R1422K22k
R152k22.2k
R2210K10k
R2310K10k
R1620K20k
R171K51.5k
Capacitors 17
C1922uf22u
C110n10n
C24n74.7n
C322n22n
C4220n220n
C52n22.2n
C610n10n
C7220n220n
C82n22.2n
C10100n100n
C910u10u
C132u22.2u
C2210u10u
C11220nf220n
C14100n100n
C12100u100u
C1522u22u
Diodes 1
D11n58171N5817
ICs 3
IC1TL072TL072
IC2TL072TL072
IC3TLO74TLO74
Potentiometers 9
BASS100KCC100kPotentiometer
MIDS100KCC100kPotentiometer
TREBLE100KBB100kPotentiometer
VOL50KAA50kPotentiometer
PRESENCE10K10kPotentiometer
DEEP25KCC25kPotentiometer
MID25KBB25kPotentiometer
PRES25KCC25kPotentiometer
VOLUMEA50KA50kPotentiometer
LEDs 2
LED13mm LED3MM LED
LED23mm LED3MM LED

Other boards based on the Friedman BE-OD