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Setting the Intonation on a Banjo
By Richie Dotson
The banjo uses a "floating Bridge"
system, which means that the bridge is held in place only by the string's
down-pressure against it. This works well for the banjo, but if the bridge
gets moved, needs to be replaced or the banjo doesn't note correctly when you
are playing in the upper register, then the chances are good that the banjo
bridge needs to be placed in the correct location, and here is how to do that:
What you will need:
A new set of strings on your banjo.
A yard stick
A fine-point pin.
A working, reasonably nice, electronic tuner.
Here is the whole process from beginning to end:
1, Start by making sure you have new strings
and that all your machine heads, neck and all other fasteners are tight or
properly adjusted.
2, Measure the distance from the leading edge of the nut (the edge
where the fingerboard starts) to the top, dead center of the 12th fret.
Use a yardstick and mark the 12th fret location on the yardstick with a
fine-point pen.
3, Hold the edge of the yardstick's beginning edge on the
top, dead center of the 12th fret and place the bridge under the strings (under
moderate tension) and move the bridge to the point where it's leading edge (the
edge closest to the fingerboard) is right on the mark you made.
4, Carefully scoot the bridge back (toward the tailpiece)
3/64" (three, sixty fourths of an inch)
5, With your tuner, tune all the open strings to correct
pitch and double check before moving to the next step.
6, Using only the 3rd string as a guide, play that string
open, once again making sure it is registering "G" on your tuner with
the banjo in your lap in the playing position.
7, With the banjo in the same position, fret the 3rd
string at the 12th fret. If the tuner registers "G" you are
done.
If the tuner registers something flat of G (lower) you
need to gently scoot the bridge 1/16" (one sixtieth of an inch)
closer to the finger board, keeping it perpendicular to the strings and
repeat steps 5 through 7.
If the tuner registers something sharp of G (higher) you
need to gently scoot the bridge 1/16" (one sixtieth of an inch) closer to
the tailpiece keeping it perpendicular to the strings and repeat steps 5
through 7.
If your tuner isn't picking up any differences between
these 1/16" bridge movements you should check to make sure it is working
properly. It may be time for batteries or for a better tuner. I am
not saying anything bad about a certain very popular tuner that clamps to the
headstock of your instrument and comes in black or white and with a neat little
carrying case, but they are CRAP (cant register a plunk).
Thanks for reading,
Richie Dotson (757) 223-7891
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