This is 1500 grit sand paper. It is very fine, but it is all that is needed to clean the carbon from the contacts. I fold
a strip in half length wise and place it between the contacts. Place light pressure on the contact arms to close
them and pull the paper through. Just one or two passes is all that is required to clean up the contacts.
a strip in half length wise and place it between the contacts. Place light pressure on the contact arms to close
them and pull the paper through. Just one or two passes is all that is required to clean up the contacts.
Now, reverse the fold on the same strip of sand paper, so that the paper backing is out. Make several passes
just as described above. This will polish the contact face to a mirror finish. A polished surface will resist carbon
buildup because it does not expose a low-resistance "edge" for arching (resistance breaks down along the
edges of imperfections on conductive surfaces).
just as described above. This will polish the contact face to a mirror finish. A polished surface will resist carbon
buildup because it does not expose a low-resistance "edge" for arching (resistance breaks down along the
edges of imperfections on conductive surfaces).
Here is the completed
board. You can see it
looks much less crowded
without the by-pass caps
board. You can see it
looks much less crowded
without the by-pass caps