Harmony H-306 - Channel 2 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Harmony H-306 is a push-pull 6V6 combo of around 14 watts with a tremolo circuit. A 12AX7 preamp serves two channels, each with its own volume and tone, across four inputs; a second 12AX7 is the phase inverter/driver, and a 6SH7 runs the tremolo oscillator with speed and depth controls. It gives a warm, fairly clean tone at moderate volume with a pleasant, grainy breakup when pushed.

• Made in: USA
• Wattage: 14W
• Channels: 2
• Preamp tubes: 2× 12AX7, 1× 6SH7
• Power tubes: 2× 6V6

Tags: american, vintage, 6v6, tremolo, breakup, 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).

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