National-Dobro Model 36-6 preset

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

The National-Dobro Model 36-6 is an early field-coil amplifier with hi and lo impedance inputs and a single volume control. Two 6N7 dual triodes drive a push-pull pair of type 42 pentodes, with an 80 rectifier, for about 6 watts.

• Made in: USA
• Wattage: 6W
• Channels: 1
• Preamp tubes: 2× 6N7
• Power tubes: 2× 42

Tags: american, vintage, low-wattage.

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.