aion DYNAMO Manual
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aion DYNAMO Manual

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Table of Contents

PROJECT NAME
DYNAMO
BASED ON
Bixonic Expandora
EFFECT TYPE
Envelope-controlled distortion
PROJECT SUMMARY
Loosely based on the RAT, but with an optocoupler that dynamically sets the gain based on the input
signal level, making for a highly unique and often untamed drive effect.
Actual size is 2.3" x 2.61" (main board) and 1.78" x 0.90" (bypass board).
DYNAMO REACTIVE DISTORTION
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2023-07-04)
1

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Summary of Contents for aion DYNAMO

  • Page 1 Loosely based on the RAT, but with an optocoupler that dynamically sets the gain based on the input signal level, making for a highly unique and often untamed drive effect. Actual size is 2.3” x 2.61” (main board) and 1.78” x 0.90” (bypass board). DYNAMO REACTIVE DISTORTION...

  • Page 2: Table Of Contents

    The JHS Kilt is the most notable commercial clone of the Expandora, designed in collaboration with Stu G. We haven’t traced one of these, but based on the control layout and product description, the Dynamo is likely identical except for the potentiometer mod. The Flat/Bass Cut switch is the same as the Bass/ Guitar switch from the 2000R version of the Expandora.

  • Page 3: Parts List

    Film capacitor, 7.2 x 3.5mm Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm 100pF MLCC capacitor, NP0/C0G OMIT IC2 compensation capacitor, only used for LM308. 4.7uF Electrolytic capacitor, 4mm 2.2uF Electrolytic capacitor, 4mm 4.7uF Electrolytic capacitor, 4mm DYNAMO REACTIVE DISTORTION...
  • Page 4 Switchcraft 111X or equivalent. 1/4" mono 1/4" phone jack, closed frame Switchcraft 111X or equivalent. 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. DYNAMO REACTIVE DISTORTION...

  • Page 5: Build Notes

    13% rotation (371 ohms), 32% rotation (560 ohms), and 86% rotation (1100 ohms). It can go slightly lower and higher than the stock range, as well as having all the in-between settings that were otherwise unavailable. DYNAMO REACTIVE DISTORTION...

  • Page 6: Schematic

    SCHEMATIC 1N5817 220uF 100uF 100n GAIN LEVEL BASS IC3B OP07CP TONE OP07CP 100kC JRC4558D 100k OMIT OMIT 100pF DRIVE MODE 240R 560R 2.2uF 4.7uF 820k 100n 2N3906 IC3A 1N914 JRC4558D DYNAMO REACTIVE DISTORTION...

  • Page 7: Drill Template

    0.65, y: +1.71 ø9/32” ø9/32” GAIN LEVEL x: 0, y: +0.83 ø1/4” MODE x: -0.65, y: +0.41 x: 0.65, y: +0.41 ø9/32” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.775 x: 0, y: -1.775 ø5/16” ø15/32” DYNAMO REACTIVE DISTORTION...

  • Page 8: Enclosure Layout

    ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B DYNAMO REACTIVE DISTORTION...

  • Page 9: Wiring Diagram

    WIRING DIAGRAM NC OUT GND +V +V JACK GND JACK GND GND PCB 125B DYNAMO REACTIVE DISTORTION...

  • Page 10: Document Revisions

    (In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.0 (2023-07-04) Initial release. DYNAMO REACTIVE DISTORTION...

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