What tubes does the Ampeg Vt 40 3 use?

The Ampeg Vt 40 3 uses 3× 12AX7 preamp tubes and 2× 6L6GC power tubes.

When was the Ampeg Vt 40 3 produced?

The Ampeg Vt 40 3 was produced 1971–1976.

Ampeg Vt 40 3 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

A third schematic page for the Ampeg VT-40 guitar combo, likely covering the power supply, reverb circuit, or tremolo oscillator section of this all-tube 40-watt combo. The VT-40 included both reverb and tremolo in addition to its two-channel preamplifier, making this a relatively complex amplifier requiring multiple schematic pages for complete documentation. This third page would typically address the effects circuits or power supply filter network.

Years produced: 1971–1976
Made in: USA
Wattage: 40W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 6L6GC

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.