Bechstein

[Jim Coleman, Sr.]

Hi Peter:

The usual cause for this uneven hammer line is that the repetition
lever height was not set properly. The typical adjustment should be
such that the lever and the jack top both support the hammer knuckle.
The test is that when the jack tender is gently depressed with a
finger, the hammer should drop perhaps 1/32" and then rise when the
the jack tender is slowly released. Now, if there is not enough
spring tension, this will not work. If there is too much torque in
the rep. lever bushing, it will not work. If there is too much tension
and the rep lever is too high, it will not drop.

Jim Coleman, Sr.

On Sun, 12 Oct 1997, Peter Kestens wrote:

> PETER KESTENS
> Het Muziekinstrumentenatelier
> BELGIUM
> KESTENS.P@Debcom.be
> 
> Dear list,
> 
> I'm truying to do a clean job in restorating a Bechstein grand.  Now, when
> I'm started with the regulation alittle problem is coming.  
> I've placed the hammers with a portable let off rack at the same height but
> when you wait a while you see appearing differences in the height of the
> hammers although my setting was done very accurate.  Any explanation for
> this?
> Peter
>