ringing overtones

[Gary Fluke]

Yep, that happened to me recently.  The ringing didn't stop even with firm pressing of the suspect damper.  It took me a few minutes to figure it out.  When I did figure it out, I wondered how I could have spent so long denying the reality that the damper I was pressing against strings was not the one with a problem.


Gary Fluke
Snohomish, WA

  ----- Original Message ----- 
  From: Tom Sivak 
  To: Pianotech List 
  Sent: Friday, October 19, 2007 6:29 AM
  Subject: Re: ringing overtones


  It's possible that another string is actually ringing.  Does it stop when you mute the string with your finger?  If not, it might be a different string ringing in sympathy with the offending string.  

  Tom Sivak
  Chicago

  Noah Haverkamp <noahhaverkamp at yahoo.com> wrote:
    There's a copper-wound tenor bichord (at the break) on a Kawai CL-4WO 44" console serial number 1821717 that rings high unpleasant overtones rather loudly, loud enough so you can hear it over the phone, as soon as the damper damps the strings. When I mute either string it still happens. I moved the damper head up and down, left and right and every which way and checked damper timing - nothing helped. It appeared to fit nice and neat into the gap of the bichord. It was seated firmly against the bridge and bridge pins. The strings are aligned at the v-bar. 

    Is it possible I just didn't get the damper to seat just perfectly? After I left I thought of this possibility: maybe the damper felt is too tough. Perhaps replacing it with fresh? or a softer kind? The other notes just above rang just a little as well, but only half as bad. 

    Or is it just the piano? Can nothing be done?

    -Noah Haverkamp Frere


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