Restringing

[Richard Brekne]

David ilvedson wrote:

> I would tend to go with what was designed in the piano.
> Emory cloth will make the smallest change.  We don't want to
> flatten it out though.  String grooves usually not very deep.  It
> seems to me that a sharper capo means less surface area to
> take the pressure of the string and possibly more cutting into
> the capo.
>

Thats true... but thats only part of the picture, the two different profiles have
different and very measurable affects on the amount of inharmonicity, and depending on
the scale tension, and the hardness of the iron, the effect of one can be more
desireable both from an acoustic point of view and from a wear and tear point of view.
You also have such things as the length of the front duplex, the angle the string has
from the capo up to the ubar or whatever is employed.

All in all I tend to agree that its best to go with what the designer / builder started
with. Sometimes that means a nearly flat top (bottom) on the capo and a very thin
surface area. 0,5 mm is given most often in these cases.

>
> David I.
>
> Date sent:              Sat, 12 Feb 2000 09:24:11 +0100
> From:                   Richard Brekne <richardb@c2i.net>
> To:                     pianotech@ptg.org
> Subject:                Re: Restringing
> Send reply to:          pianotech@ptg.org
>
> >
> >
> > David ilvedson wrote:
> >
> > > I typically use emory cloth to smooth out capo bars.  I have
> > > used files and wonder if they are necessary?  Deeply grooved
> > > capos would be a reason, but useally the cuts are minor...
> > >
> > > David I.
> > >
> >
> > It kinda depends on what profile you are after. If you aggree with some of the
> > fellows on this list, an emory cloth should be just the thing as you are going for
> > a nice fat round shape.
> >
> > I personally remain unconvinced that this is the best profile in every situation.
> > In cases where you want a thin and sharp profile, emory cloth might be a be more
> > difficult to use. A file works great to create this shape.
> >
> > As far as whats best... thats another discussion, and there are plenty of folks on
> > both sides of that fence.. grin.
> >
> > Richard Brekne
> > Associate PTG, N.P.T.F.
> > Bergen, Norway
> >
> >
> >
>
> David Ilvedson, RPT
> Pacifica, CA
> ilvey@jps.net

--
Richard Brekne
Associate PTG, N.P.T.F.
Bergen, Norway