DIY Pee Wee Hammond (AO-44 Conversion) - Main preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Pee Wee Hammond (AO-44 Conversion) is a DIY project repurposing a Hammond organ AO-44 amplifier chassis into a guitar amplifier. Hammond organ amplifiers like the AO-44 are prized conversion candidates because of their high-quality transformers and tube complement. The nickname Pee Wee Hammond suggests a compact build with the character of a Hammond organ amp.

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.