REFRACTOR PROFESSIONAL OVERDRIVE
15
MAIN PCB: CAPACITORS (POLARIZED)
Populate the electrolytic capacitors. These are the tallest components so we save them for last. They are
polarized (i.e. they will only work in one direction), so note the vertical mark that indicates the negative
side. The longer leg is positive and fits in the square pad.
Next, populate the yellow tantalum capacitor (C16). Be very careful with this: unlike electrolytic
capacitors, tantalum capacitors have the “+” (positive) side marked instead of the negative. Since
tantalum capacitors aren’t commonplace in guitar pedals, many people instinctively reverse them, and
as a result, their build has issues. Like electrolytics, the longer leg still goes in the square pad.
These are the last of the on-board components. Now is the time to go back to page 13 and insert the ICs
into the sockets.
PART VALUE
C2
4.7uF
C15
4.7uF
C16
1uF tantalum
C17
100uF
C18
47uF
C19
10uF
C20
10uF
C21
10uF
C22
10uF
