Drunk Beaver Bat

Rat with 2 Op Amps and 6 Clipping Options

BAT is my take on the classic Rat circuit with the ability to select different op-amp chips and six clipping options. I've used NOS (new old stock) LM308 and OP07 operational amplifiers for this version. You can explore different Rat voicing by selecting between 6 clipping options: boost (op-amp clipping - very loud), soft (op-amp feedback loop) BS170 MOSFETs (crunchy tones), soft NOS AAP153 Germanium diodes (perfect for Bass), hard Silicon 1N914 diodes (same as classic Rat), red LEDs (like Turbo Rat), and NOS Soviet D9 Germanium diodes (similar to Your Dirty Rat).

Controls
- Distortion - the amount of drive.
- Filter - controls treble frequency response.
- Volume - effect output level.
- Op-Amp switch - a selection of two chips: Vintage (LM308) and Modern (OP07).
- Mode switch - 6 clipping modes selection: Boost, Soft MOSFET, Soft Ge, Hard Si, Hard LED, and Hard Ge.
- Fat switch - allows selecting bass level from 3 options: Stock (classic Rat), Fat (more low-end), and Low (a lot of bass).
- LED brightness trimmer - placed on the PCB trimmer allows you to adjust the status LED brightness.

Power Supply: 9V DC adapter (Boss-style negative center) not included.
No batteries. They are bad for the environment 🌲.