[pianotech] Increasing bridge height

[David Love]

I'm not sure what your responding to exactly.  The goal is a uniform string
height  and a "slightly" graduated or even bridge height such that at the
treble end it is tall enough so as not to compromise tonal output.  The
question was if you had to raise the string height in order to achieve that
would you change the leverage.  Whether you do or not seems to have entered
the realm of picking nits and gotten complicated by the fact that on many
pianos because of the plate characteristics it is impossible to achieve both
of those goals.  So, in practice, even if it does change the leverage (and
I'm not convinced that it does) I don't think it changes it enough to not
make the necessary plate adjustment which was really the point of my initial
comment.  It's all getting a bit muddled at this point.

 

David Love

www.davidlovepianos.com

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Jon Page
Sent: Wednesday, March 25, 2009 6:46 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Increasing bridge height

 

The original question was whether a change in the string height accompanying

by an equal and offsetting change in the bore distance changes the action

leverage.  My most recent comments addressed the practical aspects of making

those changes even if it does to some small degree change the leverage.

 

The change is that it would make the shank ratio more consistent across the
keyboard.

Anything one can do to make measurements similar causes less variation
between the registers.

 

I don't think sacrificing an even string height for prescribed cast-in front
duplex lengths optimal

for regulation and questionable for the tonal benefit.

-- 


Regards,

Jon Page

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