Stei-D - "rolled" bridge

[V T]

David,

This is going to be a naive suggestion after all the
work that's been done to the instrument, but it may be
worth checking if all the plate bolts were tightened
before the piano was strung.

Vladan

David Renaud 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


	
		
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