DGWVI
Well-known member
- Build Rating
This was originally just going to be a Turbo Rat featuring the Soviet UD1408 and glass LEDs, but I had to make some further adjustments to compensate for how dark the chip turned out to be.
You'll notice the chip is upside down- I bought a couple dozen of these from a guy in Ukraine, and tested them all, six of them were apparently cased backward. The rest I have on hand have the typical orientation. These upside down versions also seem to have a lot less treble than their right way around counterparts and the proper LM308
Tweaks are mostly to address the aforementioned darkness inherent to the chip-
I don't have an unmodded Turbo Rat right now, so I compared it to my stock Rat 2
This chip with my tweaks has a more Metal- flavored voice than a typical Rat, in my opinion, but it still does it's slightly fuzzy thing.
You'll notice the chip is upside down- I bought a couple dozen of these from a guy in Ukraine, and tested them all, six of them were apparently cased backward. The rest I have on hand have the typical orientation. These upside down versions also seem to have a lot less treble than their right way around counterparts and the proper LM308
Tweaks are mostly to address the aforementioned darkness inherent to the chip-
- R9 - 1k
- C7 - 47p
- C8(comp cap) - 5pf (two 10pfs in series)
- C11 (filter cap) 1n
- C5 is 2.7u to shift the cutoff down a smidge
- Filter control is 50k
- Dirt pot is 100kD
- I've added a 470r resistor to lug 1 of the distortion pot
I don't have an unmodded Turbo Rat right now, so I compared it to my stock Rat 2
This chip with my tweaks has a more Metal- flavored voice than a typical Rat, in my opinion, but it still does it's slightly fuzzy thing.