aion GAIA MK.II Manuale - Pagina 2

Sfoglia online o scarica il pdf Manuale per Amplificatore aion GAIA MK.II. aion GAIA MK.II 10. Preamp drive

1 Project Overview

2 Introduction & Usage

INTRODUCTION

The Gaia Preamp Drive is an adaptation of the Catalinbread Galileo, their pedal emulation of treble-

boosted Vox

AC30 tone made famous by Brian May of Queen.

The Galileo is essentially a combination of two other Catalinbread pedals, the

silicon Rangemaster treble booster) and the CB30, their take on the AC30. In fact, the first version of

the Galileo was just these two circuits in the same enclosure with separate controls and footswitches for

both circuits.

The second version of the Galileo was a complete redesign, taking the same basic building blocks of a

treble booster + amp-style overdrive, but reducing it down to 3 knobs: treble booster gain (just called

Gain), tonestack treble (just called Tone), and master volume. The amp section's gain control and bass

knob are internally fixed. This 3-knob Galileo is the version that this project is adapted from.

The original 3-knob Galileo used MPF4393 JFETs, which are no longer produced. Aion FX sells the

original MPF4393

in sets of 5. The PCB also has an extra pad so that surface-mount JFETs can be

used (part number MMBF4393), which are still in production and perform identically to those used in

Catalinbread pedals. See build notes for more details.

The Gaia Mk. II is compatible with the

circuit at 18V without an external adapter. The higher voltage provides increased volume and clarity.

USAGE

The Gaia Mk. II has the following controls:

• Gain controls the amount of gain in the treble-booster stage that precedes the amplifier section.

• Tone is equivalent to the treble control of the AC30's tone stack.

• Volume is the overall output level.

GAIA PREAMP DRIVE MK. II

10 Licensing

18V Voltage Doubler / Bypass module

Naga Viper

(a hot-rodded

if you want to run the

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