[pianotech] Interesting find

[Phil Frankenberg]

The springs are in the 2nd 3rd and 4th photos of the original post.

Phil Frankenberg
CSUChico
Chico, Ca.
  ----- Original Message ----- 
  From: Gerald Groot 
  To: davidlovepianos at comcast.net ; pianotech at ptg.org 
  Sent: Tuesday, October 19, 2010 10:37 AM
  Subject: Re: [pianotech] Interesting find


  Geez, I had my glasses ON and I thought it was a spring too!  Oh boy! 

   

  From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love
  Sent: Tuesday, October 19, 2010 12:22 PM
  To: pianotech at ptg.org
  Subject: Re: [pianotech] Interesting find

   

  I don't think the wedge will kill sustain, though it might make it softer. Hold a tuning fork on a rigid steel table and it will continue to vibrate for a long time.



  David Love
  www.davidlovepianos.com


------------------------------------------------------------------------------

  From: Terry Farrell <mfarrel2 at tampabay.rr.com> 

  Sender: pianotech-bounces at ptg.org 

  Date: Tue, 19 Oct 2010 12:05:52 -0400

  To: <pianotech at ptg.org>

  ReplyTo: pianotech at ptg.org 

  Subject: Re: [pianotech] Interesting find

   

  I should think a wedge against the middle of the soundboard would do nothing other than kill volume and sustain. Yes it would make it stiffer - but by binding the soundboard to the brace underneath, you are basically gluing the soundboard to a small length of rim - in the middle of the soundboard! Yes, stiffness in a panel will increase sustain, but I think only if the stiffer panel is able to vibrate freely - and a wedge in the middle of it will pretty much kill that I should think!

   

  Terry Farrell

   

  On Oct 19, 2010, at 10:02 AM, David Love wrote:





  It won't actually make the sound louder.  Stiffening in this manner is an attempt to improve sustain (usually).  More stiffness means less loudness, at least at attack, but a slower rate of energy loss, i.e. more sustain. 

   

  David Love

  www.davidlovepianos.com

   

   




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