Description

BAT Cold War is our take on the classic Rat circuit with the ability to select different op-amp chips and six clipping options. For this version, we've used NOS (new old stock) LM308, and NOS Soviet UD1408 from 80th (Soviet reverse-engineered LM308 clone) operational amplifiers. 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 AAP-153 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: West (LM308) and East (UD1408).
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.

About the name

The "Cold War" designation refers to a unique feature of this version: the option to use a UD1408 op-amp, a Soviet-era clone of the original LM308 chip, reverse-engineered during the Cold War period. This historical component adds a distinct flavor to the core sound identity.