Scaling problem

[Joseph Garrett]

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Carl,
Probably so. Or, they may be letting their student scalers mess around. =
Who knows what evil lurks.:-)
Joe
  ----- Original Message -----=20
  From: Carl Meyer=20
  To: pianotech@ptg.org=20
  Sent: Saturday, May 19, 2001 7:03 PM
  Subject: Re: Scaling problem


  Kevin:
  =20
  Pscale has the original scale for a Yamaha GH1B and also a Samick =
G150.
  =20
  If you superimpose the graphs you see the difference.
  =20
  Yamaha has a 26 bass with 169 pounds and .11 % inh at note 26, =
changing to 105 pounds and .315 inh at note 27.
  =20
  The Samick has a 30 bass with 164 pounds and .163 inh at note 30, =
changing to 142 pounds and .209 inh at note 31.
  =20
  The program includes a good number of original scales that you can =
just click on and look at the curves.  Very dramatic.
  =20
  A rescale might convert the four to six notes above the break to =
bichord wound strings.
  =20
  Could that be an attempt to not make it toooooo good and interfere =
with the sales of their better models?????
  =20
  Carl Meyer
  =20
  =20
    ----- Original Message -----=20
    From: Kevin E. Ramsey=20
    To: pianotech@ptg.org=20
    Sent: Friday, May 18, 2001 7:23 PM
    Subject: Scaling problem


        I've noticed something on some newer pianos lately, and decided =
to ask the opinion of the sages on the list. I've been encountering more =
and more pianos of late that seem to have a real scaling problem in the =
low tenor section. Baldwin model 248 comes to mind; ( the last note in =
the tenor is C# I believe), but where I really see it is in the new =
Yamaha model GA1, and to a lesser extent in the GH1. What is happening =
is that the designers of these pianos have put too many notes in the =
tenor that belong in the bass. As you play chromatically down the scale, =
these notes start sounding like "pong-pong-pong" and then you hit the =
bass, and they sound normal again.
        I know that this is caused by continuing to drop the tension on =
the strings in order to get the fundamental down to the required =
frequency, but you reach a certain point, and you get a tone that seems =
hollow and is very difficult to fit in with the rest of the tuning.
        I've had some partial success with carefully doping the hammers, =
and voicing the bass down, plus leveling strings, straightening =
termination points etc., but not to any totally satisfactory result.=20
        Got any good advise? I'm all ears. =20
    =20
        Or is it just poor design?
    =20
    =20
    Kevin E. Ramsey
    ramsey@extremezone.com=20

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