aion HORIZON Manual 

1 PROJECT NAME HORIZON BASED ON EFFECT TYPE PROJECT SUMMARY DOCUMENT VERSION Catalinbread Dirty Little Secret Mk. I An “amp in a box” drive pedal inspired by the sounds of 1970s Marshall amplifiers. Overdrive 1.0.0 (2018-09-22) BUILD DIFFICULTY Easy Actual size is 2.3” x 1.86” (main board) and 2.3” x 0.86” (bypass board). ...

2 TABLE OF CONTENTS 1 Project Overview 7 Enclosure Layout 2 Introduction & Usage 8 Wiring Diagram 3-4 Parts List 9 Licensing 5 Schematic 9 Document Revisions 6 Drill Template INTRODUCTION The Horizon Amp Overdrive is a recreation of the Catalinbread Dirty Little Secret Mk I, a unique drive pedal that resembles a Marshall amp stack in it ...

3 PARTS LIST This parts list is also available in a spreadsheet format which can be imported directly into Mouser for easy parts ordering. Mouser doesn’t carry all the parts—notably potentiometers—so the second tab lists all the non-Mouser parts as well as sources for each. View parts list spreadsheet → PART VALUE TYPE NOTES R1 ...

4 PARTS LIST, CONT. PART VALUE TYPE NOTES C11 4n7 Film capacitor, 7.2 x 2.5mm C12 47n Film capacitor, 7.2 x 2.5mm C13 47pF MLCC capacitor, NP0/C0G C14 10uF Electrolytic capacitor, 5mm C15 2.2uF Film capacitor, 7.2 x 5mm C16 33n Film capacitor, 7.2 x 2.5mm C17 3n3 Film capacitor, 7.2 x 2.5mm C18 100n MLCC capacitor, X7R Power supply filt ...

5 BUILD NOTES JFET selection The original DLS circuit uses 2N5457 JFETs. Here’s the bad news: through-hole JFETs are getting very scarce these days, and the 2N5457 is no exception. The good news: with JFETs, there is nothing magical about a specific part number. There is wide variance even within a specific part number, and another pa ...

6 GND 1M 1N5817 100uF 100kB 1MA GND 100kB +9V 100n VA 47n 47k 100pF 2N5457 10k GND GND 2N5457 2N5457 220n 4u7 1M 1M GND VA 47R VA VA 4k7 GND 22n 47n 470k 470pF 200k 200pF GND 47pF 220pF 4n7 22k GND 47n 1M 47pF GND GND 2N5457 GND 2N5457 2N5457 10uF 1M 1M VA GND VA VA 4k7 GND 22k 12k 33n 200k GND GND 3n3 GND GND 470k 2u2 R1 D1 C ...

7 DRILL TEMPLATE Cut out this drill template, fold the edges and tape it to the enclosure. Before drilling, it’s recommended to first use a center punch for each of the holes to help guide the drill bit. Ensure that this template is printed at 100% or “Actual Size”. You can double-check this by measuring the scale on the printed p ...

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

9 WIRING DIAGRAM 125B IN +V GND N.C. N.C. OUT PCB IN GND +V +V JACK GND JACK OUT IN GND GND PCB OUT Shown with optional 9V battery. If battery is omitted, both jacks can be mono rather than one being stereo. Leave the far-right lug of the DC jack unconnected. ...

10 LICENSE & USAGE No direct support is offered for these projects beyond the provided documentation. It’s assumed that you have at least some experience building pedals before starting one of these. Replacements and refunds cannotbe offered unless it can be shown that the circuit or documentation are in error. All of these circuits h ...