Nasty Baldwin treble

[Roger Jolly]

Hi Gordon,
                   The metal pieces are called treble resonators, and are 
made of case hardened steel.   It will be highly unlikely that they have 
grooves in them causing the normal capo noise problem.

This sound is symptomatic of the hammers getting too hard, or the hammers 
having grooved string marks.

Reshape hammers, listen.  If more is needed. Needle the shoulders. Two or 
three insertions with triple needles is usually enough.   If more is 
needed, you are probably dealing with keytop type hardener.  Two solutions. 
1. Needle about 1-1.5mm directly into the crown. 2. Acetone flush.  Drench 
hammers in acetone, wait 10-15mins to allow the acetone to get the hardener 
plastic. Drench hammers again on the crown until the acetone is running out 
at the bottom of the molding. Do not play the piano for at least 4hrs.
You will use quite a bit of acetone. 1/2 pint is not uncommon.  So it's not 
for the faint hearted.

The acetone flush gives the better results, and I prefer to leave the piano 
over night before playing any notes.  If this approach scares you, get the 
assistance of an experienced voicer.

For Ric.  Intoner.

Hope this helps.  But I do have a lot of experience with these pianos.

regards Roger


At 07:16 PM 11/13/02 -0800, you wrote:

>--- gordon stelter <lclgcnp@yahoo.com> wrote:
> > I am working on a Balwin SF grand for a church with
> > all sorts of nasty ringing and "trash" noise in the
> > upper treble where, instead of a normal capo bar, it
> > has those individual bearing "nuggets" ( my
> > terminology )
> > Any suggestions? ( on the noises, not my terminlogy,
> > please )
> >      Thump
>
>
>__________________________________________________
>Do you Yahoo!?
>Yahoo! Web Hosting - Let the expert host your site
>http://webhosting.yahoo.com
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives