What tubes does the Epiphone EA-50 Pacemaker use?

The Epiphone EA-50 Pacemaker uses 1× 6EU7, 1× 6C4 preamp tubes and 2× 6AQ5 power tubes.

When was the Epiphone EA-50 Pacemaker produced?

The Epiphone EA-50 Pacemaker was produced 1962–1966.

Epiphone EA-50 Pacemaker preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The EA-50 Pacemaker is Epiphone's simple low-power practice combo of the 1960s. Two inputs feed a 6EU7 twin triode, with a single volume control between its two stages and no tone control. A 6C4 split-load phase inverter drives a pair of cathode-biased 6AQ5s in push-pull, with no negative feedback loop, and a 6X4 valve rectifier supplies the circuit.

Years produced: 1962–1966
Made in: USA
Channels: 1
Preamp tubes: 1× 6EU7, 1× 6C4
Power tubes: 2× 6AQ5

Tags: american, vintage, low-wattage, practice.

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.