DIY Overdrive Guitar Pedal Effect Pedals Electric Effects Kit Yellow OD-1

This pedal is apparently a clone of the OD-1 revised circuit (with dual op-amp rather than the original quad op-amp). It has a unique character in that it uses asymmetrical clipping accomplished with a different number of diodes on each side of the waveform. I was also surprised to see the use of a 2N7000 with (I think) Gate tied to Source, but apparently this is done to use the device for its unique diode properties. Also noteworthy is the trim pot. I was a bit disappointed initially when I fired up the circuit at the amount of distortion available at max drive, until I rotated the trim counterclockwise and significantly increased the gain. For me, full "on" at the trim pot allows the drive control to have enough range from subtle overdrive to a fairly hard distortion - not quite as much as an MXR Distortion Plus or a Rat, but much more than from, say, a Klon clone. Overall this was a fun build, easy for those familiar with the "high-level" Landtone instructions. (Note - one thing I had to assume that is not documented - the power jack negative signal needs to be connected to ground - obvious, I know, but not documented and could be overlooked by a beginner.) As far as drilling the case, I used other Landtone boxes I had built (that were pre-drilled) as a "guide" for drilling in terms of hole placement and it worked out well. Just think it through and drill carefully.

This was my first diy build and overall I am very happy with it. There are a few questionable things on the instructions, but otherwise I got it figured out with minimal issue and I'm a novice. DeadKoby on YouTube has a video of this exact build that I found somewhat helpful, but it cuts off at the end before he explained the power wiring. Luckily he does have another video with a Distortion-No1 pedal that explains/uses the same power setup.