Oahu 345-K preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Oahu 345-K is a 1942 lap-steel amp built by Valco for the Oahu Publishing Company. A 6SF5 triode preamp drives a single 6F6 output tube in class A, with a 5Y3 rectifier and a field-coil speaker, for about 6 watts.

• Made in: USA
• Wattage: 6W
• Channels: 1
• Preamp tubes: 1× 6SF5
• Power tubes: 1× 6F6

Tags: american, vintage, class-a, 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.