The Dinosaural OPA-101 Overdirven preamp is a variation (or improvement) on the Dinosaural Tube Bender.
This is has the tone control like the the Aion FX version, but I did leave the output stage as a buffer as per the original. The filter itself is on the original which you can see on the schematic / tracing journal. Well worth a read as there's a lot of really useful background information on this pedal.
There's also the option to run this true, or buffered bypass. Personally I'd run buffered, but that's just me.

2 comments:
Hi Andy, just wanted to leave a comment that I built this one successfully. Using the buffered bypass, works great. Thanks for the layout!
Thanks ithop - it’s a nice little circuit.
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