working for a university

allen@pengar.com allen@pengar.com
Sat, 06 Jan 1996 11:54:28 +0000


Bill,

Thanks for all of your comments in your email!  I didn't understand
your comments about stability.  Would you please elaborate a bit
about doing the bumps.

> A word about tuning stability.  Test blows are useful, but you'll find much
> more about how those string tensions lie by giving a quick bump sharp and
> flat to the wire this side of the speaking length. Of course whatever the
> pinblock torque is the string friction has to be below it. If the
> relationship between pin and string friction is right, a quick bump up and
> down at the tuning pin and quick observation of how the speaking length
> changes for the bump in either direction will tell you how well balanced the
> tension diferential across the friction barriers (duplexes ridges, capos,
> etc.) with respect to those friction barriers. If the bump sharp produces a
> greater change in the speaking length than the bump flat, the saftey margin
> on the sharp side is slimmer than on the flat side, and the pin needs to be
> rotated one degree and 15 seconds flat (leaving it of course torsion-free).
> You'll know you're centered when the change is the same in either direction.

Thanks!

/Allen



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