What tubes does the Ampeg Jet J-12T - Accordion use?

The Ampeg Jet J-12T - Accordion uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Ampeg Jet J-12T - Accordion produced?

The Ampeg Jet J-12T - Accordion was produced 1958–1963.

Ampeg Jet J-12T - Accordion preset

Verified · 87/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The J-12 Jet Bright channel schematic from the DIY Guitar Archive documents the high-sensitivity, treble-boosted input of Ampeg's early guitar combo. The Bright channel adds sparkle and presence, making it ideal for single-coil pickups. This represents one of the earliest iterations of the long-running Jet series.

Years produced: 1958–1963
Made in: USA
Wattage: 12W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

Tags: guitar, american, vintage, low-wattage, clean.

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.