aion POSITRON Manuale - Pagina 2

Sfoglia online o scarica il pdf Manuale per Amplificatore aion POSITRON. aion POSITRON 9. Preamp drive

1 Project Overview

2 Introduction & Usage

INTRODUCTION

The Positron Preamp Drive is an adaptation of the Gorilla TC-35 Tube Cruncher amplifier that first

appeared in 1986. The Gorilla amps were solid-state combo amps aimed at the budget market. They

were not terribly well-regarded in their day, but they caught the eye of Josh Homme from Queens of the

Stone Age who cranked them for their unique overdrive tone.

Interestingly, there are no clipping diodes present, and so all of the overdrive comes from overloading

the opamp. Typically this is an undesirable characteristic that is avoided, but in this circuit it works.

The Positron is an adaptation of the TC-35's preamp section. It's a direct clone of the circuitry based on

factory schematics, running on the same voltage as the original, but meant to be used as a standalone

drive pedal instead of a true preamp.

USAGE

The Positron has the following controls:

• Drive controls the gain of the second op-amp stage. At higher levels, it pushes the op-amp into

clipping.

• Bass, Mid and Treble form a 3-band Fender-style passive tonestack located after the drive stage.

• Volume controls the overall output of the effect.

POSITRON PREAMP DRIVE

9 Licensing

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