More Scaling Questions

[Robert B Edwardsen]

Del:

The third bridge on this Knabe is "behind" (closer to the tail) the treble bridge so the
speaking length is actually longer than the notes directly above them in the scale.
That's why I was thinking that plain wire might be a solution, of course the entire
instrument would have to be rescaled, something I have never done before.  I have seen
lots of third bridges, but they have always been in front of the treble bridge, which I
might add seems to stifle the board a little bit.

Rob

Delwin D Fandrich wrote:

> Rob,
>
> I'm not Jim, but we did just finish a 7' 8" Knabe with three bridges. In spite of my
> general dislike for copper wrapped tri-chord strings I did keep that configuration on
> this piano. The performance was acceptable, but it did confirm all of the reasons why
> I don't like them on pianos of this, or any other, size. We have another Knabe of the
> same size and type. This time I will be converting that section to bi-chord wrapped
> strings. The speaking lengths are much too short for plain steel strings. With the
> bi-chords I can blend unison tensions, string impedances and inharmonicity much better
> than is possible with tri-chord wrapped strings.
>
> Del
>
> --------------------------------------------------------------------
>
> Robert B Edwardsen wrote:
>
> > Hi Jim:
> >
> > I'm going to restring/rescale an old Knabe grand (#30126) which has an auxiliary
> > bridge for for the transition area to the bass which is behind the treble bridge.
> > Have you ever seen such an arrangement?
> > I won't have the piano in the shop until about August first so I don't have exact
> > measurements at this time, but I'm wondering if this auxiliary bridge might be
> > better off with plain wire.  It has tri-chord wound at this time.  It was restrung
> > about 25 years ago so I'm not sure how close to the original scale the current
> > wires are. I was wondering what you might do with such an arrangement.
> >
> > Thanks,
> >
> > Rob Edwardsen