PermO
Well-known member
Hello,
This is my first original design, and I would like to share it with you people.
What started as a guitar distortion pedal which I did not like, ended up a stereo bus processor which I do like.
It is based on one 12au7 per channel running at 12.6V, the heater voltage, so the whole thing runs at 12.6V from a 2.5A rated SMPS PSU.
There's a FET on the output stage to force the output impedance down so it integrates with an unbalanced bus insert on my mixer.
It can run pretty clean, I have been tweaking the circuit a lot, to the point that I can play albums trough it at a nominal level, without being offended.
Pushing the drive results in harmonic distortion and slight compression, there's a sweetspot depending on programm material, overdoing it will result in nasty clipping.
It's not for mastering, cool results can be had on drumbus, synths, parallel on bass... etc. The less harmonic complex the material the harder you can push it.
It can be build cheap, run off a wallwart, and produce some cool sounds.
Wiring guide;
So, yeah.. there it is...
Cheers !
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