[CAUT] restrung D

[Ron Nossaman]

> While on this topic. I wonder if there is a slight difference in speaking
> length as the string vibrates in its sideways excursion compared to the
> speaking length while in its vertical excursion? If there is, would this
> give a false beat to the string? If the pin and notch relationship has
> become compromised for whatever reason, it might result in such a situation.
> 
> Alan


This is exactly the basis for flagpoling pins causing false 
beats, as I've been describing on Pianotech for years. The 
crushed notch edge supplies the lack of support that lets the 
pin flagpole, and seating the string or driving the pin mashes 
the string into the notch edge, temporarily clearing up the 
beat because the pin can't flagpole for a while. There are a 
lot of new pianos made with the notch edge entirely behind the 
pin. As long as the pin is tight at the top, these don't 
produce false beats.

Ron N