string height

[David Love]

Plate warp.  Seemingly unavoidable.  

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Frank Emerson
Sent: Thursday, June 07, 2007 6:54 PM
To: Pianotech List
Subject: RE: string height

 

I cannot imagine the design intent being anything other that equal string
heights at the respective strike points.  Are you sure you were measuring
precisely at the strike point?  If you were measuring somewhat forward of
the strike point, you would consistently get the results you describe.
Usually, the diameter of the wire,the incline of the string, and the strike
point are taken into account in calculating the counter bore for agraffes,
to achieve equal string heights at the strike point.  It is also possible
that the plate could have been set lower than intended in the design,
causing the bridges to be planed lower for correct bearing, and thereby,
inadvertently compromising the consistency of the string height at the
strike point.

 

Frank Emerson

 

 

----- Original Message ----- 

From:  <mailto:reggaepass at aol.com> 

To: pianotech at ptg.org;caut at ptg.org

Sent: 6/7/2007 12:59:12 PM 

Subject: string height

 

Hi Lists,

We recently measured string heights on a Steinway B and  Yamaha G2.  An
astute assistant noticed that on both pianos the highest note (pitch-wise)
in the tenor was higher than the lowest note in the tenor (more than can be
explained by the gradual decrease in wire diameters, were the agraffes all
level) and that the lowest note in the capo (pitch-wise) was higher than the
highest note (C8).  Is it just a coincidence that we happen to measure two
very different pianos with this same set-up, or is there an overarching
design reason for this (making it a goal by design shared by many
manufacturers)?

Thanks,

Alan Eder 


  _____  


AOL now offers free email to everyone. Find out more about what's free from
AOL at  <http://www.aol.com?ncid=AOLAOF00020000000437> AOL.com.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20070607/2c3365db/attachment.html