Haunted new soundboard

[Erwinspiano@AOL.COM]

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In a message dated 1/25/2002 9:40:51 PM Pacific Standard Time, 
Karintunes@AOL.COM writes:


> Subj:Re: Haunted new soundboard 
> Date:1/25/2002 9:40:51 PM Pacific Standard Time
> From:<A HREF="mailto:Karintunes@AOL.COM">Karintunes@AOL.COM</A>
> Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> Sent from the Internet 
> 
> 
> 
> Thank you, Dale.
> 
> It's been a while since I've seen the piano.  The fundamental where the 
> resonance starts is much lower on this one; G# (or G#1, can't remember).  
> That note is louder, and all the partials above it... ex. the octave, 
> twelfth (sp?) and up along the overtone series.
> The biggest problem is when a resonance partial beats against the note it's 
> closest to as I'm trying to tune, partials not being equal-tempered and 
> all.  The customer hears the resonance, too, and doesn't like it.

  Karen--I'd still suspect something other than the soundboard itself. The 
spider is easy to check and if you will then at least you can eliminate it 
from consideration. All that's required is to wrenches and a bit of initial 
muscle to breaf the nut to nut friction loose. I believe the threads are left 
handed . After the nuts are free push and pull on the rods and check for 
slight movement. Even if negligable  simply tighten the long nut which holds 
the rods of the spider together just to make sure it's snug. All that's 
required is that each arm is snug > NO hurculean tightening needed.  This is 
not difficult nor should it be scary or any such thing.
  Something is adding to the resonance of this note you are having problems 
with and it's most likely not the soundboard. But My suggestion is that any 
reputable rebuilder backs their work so Why is it your problem to rectify and 
not his?
   Squawk a little louder please!!!   Just my humble opinion.
           Regards------------Dale Erwin

> 
> I'll check the screws, though I expected the rebuilder to have covered that 
> base.  Presumptions kill.  If that's not it, I'll also try fiddling with 
> the spider (gently).
> 
> I don't have enough training in acoustics to know whether inconsistencies 
> in a soundboard/ribs can resonate like this.  The soundboard builder is a 
> fine craftsman, but I don't know if he has any more acoustic design 
> training than I do.
> 
> Any more clues, anyone?
> 
> Karin Schmitt
> Karintunes@aol.com
> Florida Keys/Key West
> 


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