Electromuse Lap Steel (c. 1951) preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

This is a single-ended lap-steel amp from around 1951 sold under the Electromuse name, believed to be Valco/National-built; the amps carried no model markings. Lo and Hi inputs feed a volume control, a 6SH7 pentode, a tone control and a 6J5 triode, driving one cathode-biased 6V6GT in single-ended class A, with a 6X5GT valve rectifier. A Brilliance switch adds negative feedback from the speaker to the 6J5 stage.

• Made in: USA
• Channels: 1
• Preamp tubes: 1× 6SH7, 1× 6J5
• Power tubes: 1× 6V6

Tags: american, vintage, 6v6, class-a, low-wattage.

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.