What tubes does the Fender Bandmaster 6G7-A - Normal use?

The Fender Bandmaster 6G7-A - Normal uses 4× 7025, 2× 12AX7 preamp tubes and 2× 5881 power tubes.

When was the Fender Bandmaster 6G7-A - Normal produced?

The Fender Bandmaster 6G7-A - Normal was produced 1961–1963.

Fender Bandmaster 6G7-A - Normal preset

Verified · 91/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 6G7-A is a revised brownface Bandmaster piggyback head. Normal and Vibrato channels each have two inputs, bass, treble and volume, and share a presence control in the feedback loop. The Vibrato channel uses the brownface harmonic vibrato: a 12AX7 oscillator with speed, intensity and a pedal modulates split high and low bands that are recombined afterwards. A 7025 long-tail inverter drives a fixed-bias pair of 5881s from a silicon diode rectifier with a choke.

Years produced: 1961–1963
Made in: USA
Wattage: 40W
Channels: 2
Preamp tubes: 4× 7025, 2× 12AX7
Power tubes: 2× 5881

Tags: american, vintage, brownface, tremolo, 6l6, clean.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.