Chickering (Wurlitzer) Console Buzz

[sdpianotech at itctel.com]

Greetings, List.

I'm stumped.  The piano is about 12 years old and in good shape except  
that C#5 and a few surrounding notes create a strong buzz which I  
located in the top end of the bass bridge.  My early suspicions were  
loose screw/button on back of soundboard and/or loose bridge/apron  
glue joint on front of soundboard.  Later thoughts include  
delamination of plies in soundboard near end of bridge.  The buzzing  
stops if I apply pressure to the bridge, the tiny overhang of apron  
sticking out beyond the end of the top end of the bridge, or to the  
soundboard area just above the bridge.

My repair attempts were to tighten screw on the back of the soundboard  
attaching the bridge (had to drill through back post to get to it) and  
work CA glue into bridge/apron/soundboard joints on the front.  None  
of this worked.  I did my usual seating of strings and bridge pins  
with no noticeable improvement.

Any thoughts/ideas/suggestions?  This piano is played a lot by an  
accomplished church musician and the buzzing has got to go.

Thanks to all for any help.

Stuart Davidson
South Dakota, USA