puzzlement

Michael Gamble michael@gambles.fsnet.co.uk
Mon, 26 Sep 2005 14:52:52 +0100


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Hello Ed. Did you try putting a cloth against the bass strings immediately
the keys are released? These are the usual problem areas of "sympathetic"
vibrations.

Regards

Michael G.(UK)

 

  _____  

From: Ed Carwithen [mailto:ecarwithen@yahoo.com] 
Sent: 26 September 2005 02:47
To: Piano Tech List
Subject: puzzlement

 

The problem is a very prominent ring in all registers but particularly in
the low.  The piano is an Everett console, #260365.  Fairly recent with
metal support beams instead of wood in the back.  After playing a note or
chord the dampers cut off the tone, but there is a strong after ring which
can persist for seven to ten seconds.  The dampers are good and are sitting
properly on the strings.  When the strings behind the dampers are pressed
the dampers follow.  You can hear the actual tone of the struck note cut off
when the damper recontacts the string, but the echo tone continues.  

 

The piano has metal casters sitting on a wood floor in front of a sheet rock
wall.  It occurred to me that the casters were transferring the vibrations
to the floor directly causing the floor to act as a general resonator.  I
tried rubber furniture cups under the wheels and also a heavy rug with a
rubber backing as well as the rubber cups on top of the rug.  There was no
improvement.  I tried blankets in back with no improvement.  

 

Does anyone have any suggestions of things that might improve this situation
by diminishing the after ring??

 

Ed Carwithen

John Day, OR

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