What tubes does the Valco 6650TR - Channel 1 use?

The Valco 6650TR - Channel 1 uses 3× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Valco 6650TR - Channel 1 produced?

The Valco 6650TR - Channel 1 was produced 1962–1968.

Valco 6650TR - Channel 1 preset

Verified · 83/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Valco 6650TR is a high-powered offering from Valco's Supro lineup featuring tremolo and a dual-channel design, delivering 35 watts for stage applications. The 6L6 power tubes give it more clean headroom and a slightly tighter, more American character compared to the 6973-equipped models in the Supro range. The TR suffix indicates tremolo as a built-in feature, making this a versatile all-in-one combo.

Years produced: 1962–1968
Made in: USA
Wattage: 35W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 6L6

Tags: american, vintage.

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.