Valco 507 - Channel 1 preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Model 507 is a Valco-built valve amp of around 1960. Two channels, each with two inputs, a 12AX7 triode stage and its own volume and tone control, mix into a 12AX7 phase inverter driving a push-pull pair of 6L6s. A further 12AX7 runs a footswitchable tremolo. A 5U4 rectifier with standby and ground-reversing switches supplies the HT, and the amp drives two speakers plus an extension jack.

Tags: american, vintage, 6l6, tremolo, 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.