Ds1 Pedal

BUILD YOUR OWN DS-1 DISTORTION
CREDITS Document Author: Brett “5thumbs” Miller, five.thumbs@yahoo.com

Version Date: 3-3-2010 © 2008-2010 - Brett Miller and Muhammad Iqbal. All rights reserved. License granted for non-commercial use only.

Notable Technical Contributor: Muhammad “miqbal” Iqbal, iqbal.tiro@gmail.com

Special thanks to the following who helped make this document possible: 1)Johan and everyone else at the freestompboxes.org forum. 2) Jack Orman for his “More Saturation Controls” article, his DS-1 Q2 gain mod, along with all the information he’s shared with the DIY pedal community. 3) Mark Hammer for his assistance with the ‘True-Bypass DS-1 Distortion’ circuit, plus all the experience and guidance he’s shared with us DIYers. 4) R.G. Keen for generously sharing hisvast knowledge and patience with us all. 5) Robert Keeley for making information on his DS-1 “Seeing Eye” and “Ultra” mods available to the public. 6) Mxrmxr and Christ Briere (cbriere) at freestompboxes.org for schematic information for the Tonebone ClassicTM and JMP-1TM preamp. 7) The folks at Bossarea.com for information assisting in identifying power components in the pre-1994 DS-1 pedals. 8)Aron Nelson and everyone else at the diystompboxes.com forum. DISCLAIMER The information in this document is accurate to the best of the authors’ knowledge. While we’ve done our best to get all the details correct, there are no warranties or guarantees express or implied regarding its accuracy. This information is provided for reference purposes only, which essentially means that if you blow up yourDS-1 while modifying it, burn yourself on a soldering iron while trying to build a pedal based upon these instructions or fall victim to some other misfortune after reading this information… it’s your fault, not ours. If you are having issues with your DS-1 mod or replica build, please visit the forums at freestompboxes.org or diystompboxes.com and use the Search feature to see if your problemhas been previously solved by others. If not, please use this format when posting for help in either forum. By doing this, you may solve the problem yourself before posting…and if not, you’ll be communicating in a manner that will allow the other members of the forum to help you more readily. All trademarks remain the property of their respective owners. (Tonebone ClassicTM is a trademarked productof Radial EngineeringTM. JMP-1TM is a trademarked ® product of Marshall Amplification plc. BOSS is a registered trademark of the Roland Corporation.) None of the information represented in this document is affiliated with or endorsed by these entities. CONTENTS 1. Introduction 2. Build a Stock DS-1 Distortion 3. Build a True-Bypass DS-1 Distortion 4. Robert Keeley DS-1 “Seeing Eye” / “Ultra” Mods5. Brett Miller DS-1 “MIJ” Mod 6. Brett Miller DS-1 “Mondo-MIJ” Mod 7. Brett Miller DS-1 “PHLAT” Mod 1 8. Brett Miller DS-1 “Vintage Ripper” Mod 9. Brett Miller DS-1 “Huevos Grandes” Mod 10. Sound Clips 11. Appendix A: Where Can I Find B20K Pots? 12. Appendix B: How Do I Modify My Post-1994 DS-1 To Match The Original DS-1?

INTRODUCTION Have you ever wanted to build your own DS-1 Distortion,but could only find work-a-likes, schematics for the pre-1994 “vintage” DS-1 or just plain inaccurate schematics on the Internet? If so, then this document is for you. We’ll give you the information you need to build a version of the DS-1 distortion that matches the exact circuit used by the large Japanese manufacturer of the original post-1994 DS-1 Distortion (with the exception of replacing theSIP-8 dual op amp layout with a DIP-8 dual op amp layout.) Please be advised that both of the DS-1 layouts in this document are a bit more complicated than your average beginner-level project. Please consider the following factors and honestly assess your skill-level before you begin building this project: 1. The component count is higher than a booster/overdrive/simple distortion (like the MXR...