Borrowed almost entirely from the Synthrotek DIRT filter, St. Filth ups the ante on lack of hygiene and social graces. A few experimental tweaks have been made to the original design, including: a mode switch to alternate between AC-coupled and DC-coupled inputs; amplified input signal, CV over the resonance; buffered output; LED to monitor filthiness.
Schematic
As with any schematic found on the internet, exercise caution when building. Test the build before plugging it into your case. If you find mistakes in the schematic, or you have recommendations for improving the design, feel free to contact us and let us know.
BOM
- Capacitors
- 1uf electrolytic (1) C1
- 4.7uf electrolytic (1) C2
- 47uf electrolytic (1) C3
- 1nf (1) C5
- 10nf (1) C4
- Resistors
- 220R (1) R15
- 1k (3) R3, R4, R13
- 2k (1) R2
- 4.7k (3) R10, R11, R12
- 10k (2) R1, R16
- 20k (1) R5
- 30k (1) R7
- 47k (2) R9, R17
- 100k (2) R6, R19
- 120k (1) R8
- 1M (2) R14, R18
- Transistors
- 2N3904 (2) Q2, Q3
- 2N7000 (1) Q1
- Potentiometers
- 5k (1) RV1 Resonance
- 10k trimmer (1) RV4
- 50k (1) RV2 Mix
- 100k (1) RV3 Filth
- ICs
- TL074 (1) U1
- Audio jacks (3) J2, J3, J4
- Switched audio jacks (1) J1
- Switches SPDT (1) SW1
- LED (1) D1