The Durham Sex Drive. Named as such, as it was initially made for Charlie Sexton.
This is actually one of the first builds I ever did with an IC using the layout from Guitar FX Layouts - it's a nice easy one, and it sounds great too. Despite having a compression switch, it's really just swapping diodes in the soft clipping section of the circuit. This does affect the feel, and technically I suppose it changes how the signal is compressed by clipping, but make no mistake, this is not a compressor.
It runs from clean to low-level drive, and remains flat - no Tube Screamer mid-boost. Durham describes it as a clean boost, but it definitely gets dirty on the upper end of the range. At one stage, I was using this as an always-on tone sweetener. If you want some more gain, try a larger gain pot.
The tone control is a little weird and doesn't have a lot of range; I sometimes wonder if the schematic is right in this regard.
DURHAM SEX DRIVE - VERO LAYOUT
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