What tubes does the Fender Harvard 6G10 use?

The Fender Harvard 6G10 uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Fender Harvard 6G10 produced?

The Fender Harvard 6G10 was produced 1961–1963.

Fender Harvard 6G10 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Harvard 6G10 is a brownface-era student combo delivering 10 watts through two 6V6 output tubes into a single 10-inch speaker. A step up from the Champ in the student amp range, it offers warm, simple clean tones with the brownface character.

Years produced: 1961–1963
Made in: USA
Wattage: 10W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

Tags: american, brownface, vintage, 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.