Chickering (Wurlitzer) Buzzing Problem (resubmitted)

[Greg Newell]

Stuart,
	Tracing these things down can sometimes be something of a nightmare
as you're clearly experiencing. While pressing in the areas you've described
might be eliminating it temporarily the problem might not be located there.
Does this piano have nose bolts? Did you try and tighten them? How about
plate screws? How are the bridge pins? Are the bass strings themselves ok?
I've had some success taking a pair of needle nose pliers gripping the core
wire and tapping with a hammer against the side of the pliers to tighten the
winding. 
	I don't know that I'd have ever drilled through a post to get at a
suspect screw unless I was pretty sure that was the problem, especially on a
piano only 12 years old. While pressing in certain areas has cleared up the
problem while you were pressing it seems strongly to be coming from the
piano but I've experienced cases where it was not. Have you tried searching
for the buzz in the surrounding areas? Have you looked at glass in picture
frame, lamp, mics or stands touching, anything really?
	You've probably already looked at most of or all of these things
already. Sorry if this isn't any help. Best of luck!

Greg Newell
Greg's Piano Forté
www.gregspianoforte.com
216-226-3791 (office)
216-470-8634 (mobile)

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of sdpianotech at itctel.com
Sent: Monday, September 29, 2008 2:41 AM
To: pianotech at ptg.org
Subject: Chickering (Wurlitzer) Buzzing Problem (resubmitted)

Greetings, List.

I'm still stumped.  I sent this message to the list last week but far  
more interesting topics have been on the minds of list members so it's  
understandable my question has been put aside for other topics.  But I  
am still needing to solve the problem.  I'm hoping for some suggestions.

  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