Question about MDMA build and build docs

[youngflier]

I built up my MDMA (wampler ecstacy) board the other night and I've got problems. It didn't work. When I probed it I get signal after the first opamp stage but it doesn't carry past the 47k series resistor between stages.

My question is this: when I compared the board closely to the build docs I noticed that they didn't match up. The current build docs show a resistor directly below the main filter cap. My board doesn't have that resistor on it. Are there multiple versions of this board? What's up with the differences? Are there older build docs?

 

[Robert]

Yep, you have the first revision board. Some of these were affected by a defect that has since been corrected.

Remove C12, the 10uF cap in the top right corner of the board. Don't replace it, just remove it.

 

[youngflier]

Ballin'. Pulled it, fired it up, and it's all good. Thanks!