What tubes does the Fender Bassman 5B6 use?

The Fender Bassman 5B6 uses 1× 6SC7, 1× 6SL7GT preamp tubes and 2× 5881 power tubes.

When was the Fender Bassman 5B6 produced?

The Fender Bassman 5B6 was produced 1952–1953.

Fender Bassman 5B6 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 5B6 is the original TV-front tweed Bassman from the early 1950s, the first Fender amp built for the new electric bass. Two inputs feed the two halves of a 6SC7 with their plates tied together, then a single volume and tone, which sit on a separate control panel wired through an octal plug. A 6SL7GT gain stage and paraphase inverter drive two cathode-biased 5881s with negative feedback from the speaker, fed by a 5U4G rectifier.

Years produced: 1952–1953
Made in: USA
Wattage: 26W
Channels: 1
Preamp tubes: 1× 6SC7, 1× 6SL7GT
Power tubes: 2× 5881

Tags: american, tweed, vintage, bass, 6l6.

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.