B.Y.O.C. Yellow Overdrive Kit
The BYOC Yellow Overdrive is an exact clone of the very first version BOSS OD-1. It has the quad op amp circuit, not the dual op amp circuit with transistor buffers that the later versions have. This is also one of the easiest kits to build.
This is probably BYOC's easiest kit to build too. Here's some mods you might want to try:
1. Replace C3 and R5 with a .33uF film capacitor and 3.3k resistor. This will give it more available gain, restore low end, and a flat EQ response.
2. Replace the clipping diodes with two red LED's. This will give the overdrive a slightly crunchier texture and reduce compression. It will also add a little extra volume.
Click here to download PDF instructions for this kit.