Stei-D - "rolled" bridge

[David Skolnik]

David R-

While waiting for you to post your most recent measurements, I wonder if 
you measured the angle of string deflection over the rear string 
rest.  Also, the height of the peak of the string rest above the plate 
surface.  Maybe the rests were (excessively)  ground down, in an effort to 
increase downbearing.  For that matter, maybe they were installed too far 
forward of the hitch pins, which would reduce the deflection 
angle.  Finally, since it has become my obsession, I wonder about how the 
bubble gauge measurements were actually taken.

Awaiting, with interest,

David Skolnik
Hastings on Hudson





At 03:46 PM 3/1/2005 -0500, you wrote:

>   Thanks for the replies. Especially Don's and
>Ron N's comprehensive & constructive points.
>
>   I will be on site this Thursday, will compile
>more comprehensive measurements as suggested,
>and post them here.
>
>   Steinway had sent somebody to Montreal to look
>at the piano because of various complaints. It
>was looked at for voicing, seating, regulation...
>and was in the end rejected, then sent to a satellite
>conservatory where I live. A technician from Quebec
>followed it up and did extensive seating, string
>mating, regulation, and voicing....a very nice job.
>
>   I was very impressed with his work. The piano since
>refuses to have strings remain seated, and has buzzing
>back scale at various points on the plates. I
>eliminated some of these buzzes by placing some felt
>between the string and the chrome plate at the back
>scale. My hypothesis was that the bridge had rolled
>enough, or the soundboard had collapsed enough in
>front of the bridge for the front to lower, and the
>back to raise high enough to eliminate back scale
>down bearing at the plate at a couple points. I could
>press down on the string next to the chrome plate
>(what is the proper name for the back scale plates?)
>and eliminate the buzz).
>
>    I did have a second technician look with a bubble
>gauge. Where the loudest plate buzz is, plus 12 at the
>back -24 on the speaking side is rather severe.
>
>    I post will follow Thursday with more measurements,
>
>and crown observations between every rib.
>
>                              Thank You
>                              David Renaud
>
>
>
>
>is very severe.