Gibson EH-150 (early) - Microphone preset

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

The EH-150 is Gibson's pre-war amplifier sold alongside the ES-150 guitar, the pairing Charlie Christian made famous in early electric jazz. This 1936–37 version has a Microphone input on a 6F5 stage and an Instruments input, each with its own volume, mixed in a 6N7 twin triode. A switched tone network and a 6C5 driver feed an interstage transformer into two 6N6 output valves, with a 5Z3 rectifier and a field-coil speaker.

• Years produced: 1936–1937
• Made in: USA
• Wattage: 15W
• Channels: 2
• Preamp tubes: 1× 6F5, 1× 6N7, 1× 6C5
• Power tubes: 2× 6N6

Known for: Charlie Christian.

Tags: american, vintage, clean, two-channel.

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.