aion Silvanus Manuel - Page 5

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BUILD NOTES

Amp settings
The internal DIP switches allow the pedal to more closely emulate the Super Lead or Super Bass
amplifiers depending on the settings. Here are the positions Xotic recommends for each amp model:
Super Lead
ON
ON
1 2
1 2
Xotic also includes recommended drive and tone positions for each of these, but since these are very
much rig-dependent (not to mention the original amplifiers having drive and tone knobs of their own!)
they aren't as crucial to capturing the tone.
IC selection
The IC is sanded down in the original SL Drive and it's not known exactly what type they used. However,
based on our other traces, most Xotic circuits use the JRC4558D and at least one uses the LM833. We
recommend starting with the JRC4558D. From there, you can experiment with any standard dual type,
including the TL072, NE5532, or JRC4580.
Output capacitor
The SL Drive uses a 10uF capacitors (C12) as a signal coupler immediately after the JFET stage at the
output. We recommend keeping electrolytic capacitors out of the signal path wherever possible. This
PCB includes space for an alternate film capacitor (C11) in each of these positions.
Due to the low output impedance of Q1, 1uF is more than enough to pass all useful bass frequencies, so
it's recommended to use a 1uF film capacitor in this position and omit C12. (1uF is the value used in the
RAT, which the SL Drive is loosely based on.) However, if you want to stick as closely as possible to the
original circuit, use 10uF for C12 and omit C11.
SILVANUS AMP DRIVE
Super Bass
ON
ON
1 2
1 2
Super Lead+
ON
ON
1 2
1 2
Lead/Bass
ON
ON
1 2
1 2
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