Sami of SN-Audio asked me to build “on the edge” sounding fuzz/overdrive in 1U rack format so this is what I did:
A high gain silicon fuzz going into a mosfet clipper overdrive/distortion. It can produce anything from smooth overdrive to sustaining fuzz to really agressive farty fuzz sounds. Internal effect order is Fuzz->OD. I took extra care when wiring this one and doing the power/ground connections because it’s used in studio environment. To get really clean noise free power to the effects I used an old 12VDC 350mA printer power supply and ran that into a 9-volt voltage regulator (L7809CV). I also added some extra filtering (330nf from reg input to ground, 100nf+220uf in parallel from reg output to ground) to the regulator circuit to prevent any feedback/oscillation and to improve transient response. For input/output connections I used shielded cable all the way so longer cable runs inside the chassis aren’t picking up any stray signals.
I printed front/back panel graphics straight to aluminium with a flatbed UV-printer and was positively surprised to see how small details it can print!
It all turned up even better than expected, I kind of hope Sami doesn’t like this so I can keep it to myself ;)
Some sound samples:
Recording chain: Telecaster->RUP-1->Mixer->Soundcard->Gsuite VST plugin.
More soundclips with REAL amplifiers coming later.
First you hear bypassed sound, then fuzz+od on at the same time.