Question about Setting the Pins and Unison Stability

[William Benjamin]

Robert,

 

Every piano is different but you are on the right track.  It's hard to put
in words for every situation, and I think in beats, because I am from the
old world.  I pull rather flat pianos 3 or four beats sharp and a fine grand
I just get above pure before I start back down.  When I start back with the
lever I like to have to use about a third of the amount of stress that it
would take to move the pin in the block.  Is that hard to imagine.  I think
it makes sense, but after 34 years it is so second nature that explaining it
still takes some thinking.

 

William

 

 

PIANO BOUTIQUE

William Benjamin

Piano Tuner Extraordinaire

 <http://www.pianoboutique.biz> www.pianoboutique.biz

The tuner alone,

preserves the tone.

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Robert Finley
Sent: Friday, June 09, 2006 2:22 PM
To: pianotech at ptg.org
Subject: Question about Setting the Pins and Unison Stability

 

One of the problems I have been trying to solve is how to improve my unisons
so that they stay in tune longer and don't go out shortly after I have tuned
the piano. I apply firm test blows to equalize the tension along the string,
but find that the some of the unisons in the treble still go out of tune
within a few days or weeks afterwards. I think the problem is due to not
setting the pin properly. The question I have is, during unison tuning, and
when you are tuning each outer string to the center string, do you turn the
tuning lever to raise the pitch to the high side of the center string, to
the point that you hear a "tinny sound" when the two frequencies are
different, and then turn the tuning lever to bring the pitch back down so
that it sounds pure? I read somewhere that the amount the strings should be
raised before bringing it down is to the point that you can hear a beat of a
few Hz, but raising the pitch to the point where you hear a tinny sound is
more than a few Hz. Thank you for your advice. 

 

Robert Finley

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