Weird ringing - HELP!!

[John M. Formsma]

Sounds like there is a bass string that is sounding sympathetically with
some higher strings. After you hear the ringing, try putting your hand on
several low bass strings at a time to see if that makes it stop.
 
If that's it, you'll have to adjust the offending damper(s).
 
John Formsma
 
  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Terry Jack
Sent: Monday, July 24, 2006 9:37 PM
To: Pianotech
Subject: Weird ringing - HELP!!
 
I have been working on a Farrano Pian Co.  54" upright S/n23990 pre 1910.
 
At this point it has been tuned. I made the mistake of tuning it 20 cents
flat as the customer said she was concerned about it being so old. 
 
I have also done numerous minor repairs, shaped the hammers, replaced the
damper felts and given it a minor regulation.
 
The piano has developed a strange "after ring" in random notes in the mid
treble down into the single bass strings. Even if I press on the new damper
felt it continues!
 
I have checked the damper regulation (timing seems fine, lift ok and if I
press on a string the damper follows nicely. I've  done the basic string
checks ie, seated at the bridge, bridge pins, checked to see if the sound
changes at the capo bar if I gently press a brass rod agains the string
sideways etc. The plate is tight to the tuning pin block and the ribs are
tight,  I can see no cracks in sound board, nothing has fallen down between
the plate and wooden parts front or back. I have removed pictures off the
walls, items off nearby tables etc.
 
I even had a fellow RPT look at this instrument and we can not find the
trouble. she did make a couple of recommendations and I have done those.
they included checking the spacing of the hammers (again) and gently
reshaping the hammers.
 
I have one thing I am going to try yet. I see no reason not to tune this
piano to A440. I have discussed this with the owner. After literally
spending all day in her not air conditioned house in this 100 + weather here
in Oregon I gave up for the day.
 
I am totally stumped. sure would appreciate some insite from you guys and
gals!!
 
Terry Jack
Eugene/Springfield OR chapt PTG
 
 
"Life is not a journey to the grave with the intention of arriving safely in
a pretty and well preserved body, but rather to skid in broadside,
thoroughly used up, totally worn out, and loudly proclaiming   "WOW -- What
a Ride!"
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