aion POSITRON Manuale - Pagina 2
Sfoglia online o scarica il pdf Manuale per Amplificatore aion POSITRON. aion POSITRON 9. Preamp drive
TABLE OF CONTENTS
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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