National-Dobro Model 36-6 - Main preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The National-Dobro Model 36-6 is a pre-war American tube guitar amplifier from National-Dobro of Chicago, one of the pioneer companies in electric guitar development. Built during the very earliest years of electric guitar amplification, these amps represent historically significant artifacts from the birth of the electric guitar industry. The simple tube circuits of the era prioritized basic amplification over tonal sophistication.

• Years produced: 1936–1942
• Made in: USA
• Channels: 1

Tags: american, vintage.

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.