The GasTank pedal by ChunkSystems is a bass distortion pedal based on the BrownDog model. It features a hard-edged op-amp distortion with a clean blend, allowing users to restore some of the bottom end that can be lost with distortions. The GasTank has minimal tone shaping, allowing users to maintain their original bass tone while dialing in a square wave distortion.

One modification made to the original circuit is the addition of a 100R current limiting resistor on the power supply.

The GasTank offers two wiring options: true bypass and “envelope bypass” when using the ENV jack option. The envelope bypass allows users to connect the clean input of the GasTank to the envelope input of the JunkTrunk pedal, providing a more dynamic response in the filter when both pedals are used together.

The GasTank features several controls:

– DIRT: Sets the distortion volume at the output.
– CLEAN: Sets the clean signal volume at the output.
– DRIVE: Adjusts the total gain, from “warm” to hard-edge distortion.
– GATE: Controls the amount of noise reduction. Turning it clockwise eliminates hiss and noise while squashing dynamics into a highly gated response.
– S/H: Selects between soft clipping (op-amp distortion) and hard clipping (op-amp distortion plus LED clipping).
– ENV (optional): This jack is used to connect to the JunkTrunk pedal for enhanced dynamic response in the filter when both pedals are used together.

Please note that neither the Agent 00Funk nor the BrownDog pedals were true-bypass, and the GasTank offers the option for true bypass or envelope bypass wiring.

Summary created by AI from the original source.