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TABLE OF CONTENTS
1 Project Overview
2 Introduction & Usage
INTRODUCTION
The Vortex Amp Distortion is a recreation of the Bouteek Distorter Preamp, a limited-release pedal
from 2009 that flew largely under the radar. It was rumored to have the involvement of someone from
Peavey, but otherwise very little is known about the company.
Bouteek released three other pedals. The Overdriver Preamp and the Twin Drive & Boost (Ultimate
Drive) were both released in 2009. The Oil Cap Preamp followed in 2011. Each was only available for
about a year or two. By mid-2015, Bouteek was fully extinct in the wild.
Circuit-wise, the Preamp Distorter is an interesting combination of familiar building blocks. It starts
with two Tube Screamer drive stages with variable clipping options. From there, it goes into a Big Muff
tone control stage. Using two CD4066 switches, it selects between two different sets of low-pass and
high-pass filters used on both ends of the tone control. At the end, there is a gain recovery stage.
This project would not have been possible without the help of Paul Marossy. He did most of the work
tracing the pedal several years ago, but ran into a couple of issues that caused it to be shelved before it
was fully verified. Aion FX did a second pass to work out the problem areas and verify the tracing work
independently, and then designed the PCB.
USAGE
The Vortex has the following controls:
• Pregain and Drive are the first two gain stages, simulating the setup of a high-gain amplifier.
• Tone pans between a high-pass and low-pass filter. The two filters themselves are impacted by the
Tone toggle switch.
• Volume controls the overall output of the effect.
• Clipping (toggle switch) selects the clipping diodes which changes the character of the drive tone. In
Vintage mode, both stages are clipped with silicon diodes. In Rectifier mode, the Pregain stage has
no diodes while the Drive stage uses LEDs for clipping.
• Tone (toggle switch) selects between two different sets of high-pass and low-pass filters for the
tone control, altering the frequency ranges that are panned by the Tone knob.
VORTEX AMP DISTORTION
12 Licensing
2