What tubes does the Supro S6424 - Channel 1 use?

The Supro S6424 - Channel 1 uses 3x 12AX7 preamp tubes and 2x 6L6 power tubes.

When was the Supro S6424 - Channel 1 produced?

The Supro S6424 - Channel 1 was produced 1962–1967.

Supro S6424 - Channel 1 preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Supro S6424 is a larger combo amplifier from Valco's 1960s lineup, offering more headroom and a wider speaker complement than the smaller Supro models. Its circuit still exhibits the characteristic Valco compression and natural harmonic saturation when pushed, but with more clean volume available before breakup. The S6424 was a professional gigging model for working musicians in the early and mid-1960s.

Years produced: 1962–1967
Made in: USA
Wattage: 35W
Channels: 2
Preamp tubes: 3x 12AX7
Power tubes: 2x 6L6

Tags: american.

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.