Gibson EH-100 (early) preset

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

This early EH-100 is one of Gibson's first lap steel and instrument amps, with a power transformer and a field-coil speaker. One input has a 1M volume control with the power switch on it, the other a fixed divider, and both feed the halves of a 6C8 twin triode. A 6C5 driver feeds an interstage transformer that splits the phase for a push-pull pair of type 42 pentodes, on a type 80 rectifier with the speaker field coil as a filter choke. There is no tone control or feedback.

• Made in: USA
• Channels: 1
• Preamp tubes: 1× 6C8G, 1× 6C5
• Power tubes: 2× 42

Tags: american, vintage, clean, 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.