soundboard on my 1890's Knabe upright

[Ed Sutton]

There's a lot of misleading information in the post you cite, and the quote is not from David Ilvedson.
Chances are the cracks are appearing because of low humidity.
What's the relative humidity by the piano?
Best way to avoid damage is to control humidity, and if there's no buzzing, forget about the cracks.
Ed Sutton
  ----- Original Message ----- 
  From: daniel carlton 
  To: pianotech mailing list 
  Sent: Friday, February 15, 2008 1:25 AM
  Subject: soundboard on my 1890's Knabe upright


  hey techs

  i've got a rebuilt (rebuilt 2 or 3 years ago) 1890's Knabe upright. nice warm, woody sound, and it's already been used in a few recordings. i'd like to have it sound nice for many more years. i do have one concern. i've noticed a crack or two in the soundboard, and it bums me out to have a rebuilt, beautifully sounding piano with a crack in the soundboard. 
  now i did a few shims at nbss on grands we were rebuilding, but never any uprights... and in the following post https://www.moypiano.com/ptg/pianotech.php/2006-January/184497.html, David Ilvedson says you can't shim from behind. 
  so my question is can anything be done to fix the cracks?

  as always, any help is greatly appreciated.

  thanks

  daniel carlton
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