Kay 830 - Channel 1 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Kay 830 is a two-channel tube combo. Each channel has two inputs feeding its own half of a 6EU7 twin triode, followed by its own tone network and volume. The channels mix into a 6C4 gain stage and a second 6C4 working as a split-load phase inverter, driving a push-pull pair of 6BQ5 (EL84) tubes with a shared cathode resistor into an 8-ohm speaker, from a solid-state voltage-doubler supply. A bright EL84 voice that crunches when pushed.

Tags: american, vintage, el84, crunch, two-channel.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.