Tuning Pin Size

[David M. Porritt]

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Paul:

I got my February issue several days ago.  You should have yours
soon.

dave
*********** REPLY SEPARATOR ***********

On 1/25/02 at 11:37 PM larudee@pacbell.net wrote:
Erwinspiano@AOL.COM wrote: 
The details are in the article, but the disadvantage is that the 1/0
pin will be 
less rigid.  This can be a problem in a Steinway type design where
the distance 
between the point of string tension and the pin block is roughly
three times 
greater than in an open face design, and where there is no plate
bushing to 
mitigate the leverage. 
  Hi Paul -- I'll read the article but would you mind saying this a
different way as it's not clear to me. I find that using no 1 pins in
new blocks is not a problem unless fit too tight but what pin isn't.
I don't have any trouble with no. ones otherwise. I'll read the
article, really!  I can't deny that no 2 are stiffer but ones render
nicely when fit well which is why I like them.
      >>>>>>>>>>Dale Erwin
Dale, 
Part of the problem, even when you read the article, is that it's in
two installments, and the February issue isn't out yet.  The answer
to your question will probably lead to more questions, all of which
are addressed fully in the article.  The simplest answer, however, is
that in a Steinway the string height above the pin block - not the
plate - is roughly three times greater than it is in an open face
design like a Bechstein.  Since the string tension is roughly the
same, the leverage exerted by the string on the pin is three times as
great.  If the pin sizes are the same in both cases, pin flex will
produce roughly three times as much string movement in the Steinway
as in the Bechstein - i.e. it is less stable.  Going to a larger,
stiffer pin size will partly compensate for that. 
Chances are that at this point we get into "but what about...," in
which case I get to rewrite the whole article on line.  I would just
as soon wait for the February Journal.  There will probably still be
plenty to debate, but at least not the stuff I've already covered in
the article. 
Best regards, 
Paul
_____________________________
David M. Porritt
dporritt@mail.smu.edu
Meadows School of the Arts
Southern Methodist University
Dallas, TX 75275
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