aion HELIOS Handmatig - Pagina 5

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BUILD NOTES

Clipping Switch

The clipping switch allows you select between different sets of diodes.

The downward position of the toggle switch is the stock RAT clipping arrangement, which has one

silicon diode in each direction. The upward position of the toggle is two diodes in each direction, a higher

clipping threshold with a more open sound. The center position leaves only the LEDs for a more dynamic

and transparent tone.

If you look at the schematic, you'll see that the LEDs, D8 and D9, are always connected. However, in

either the up or down switch positions, the lower-threshold diodes are engaged and so the LEDs have no

effect—there's no signal left for them to clip.

Feel free to experiment, For example, you could jumper D7 for asymmetrical clipping. Or, you could omit

the two clipping LEDs for a diode-lift mode in the center position.

Sweep Control

The Sweep knob (also called the "Ruetz mod" after

Philip Ruetz of Ruetz Amplification

who came up

with it) puts some resistance in series with one of the low-end filters in the op-amp gain stage which

changes the EQ and feel of the pedal.

While you can remove this control entirely by jumpering pins 1 and 2 of the pot, it's recommended to

keep it because it's entirely out of the circuit when the knob is turned all the way down (full CCW).

HELIOS CLASSIC DISTORTION