[pianotech] Steinway A Bass String Rescaling

[William Truitt]

Hi Ron:

Is there a target breaking percentage you try to aim for when doing this
sort of rescaling?  How far up from the bottom are you decreasing the core
sizes and increasing the wrap?  Is there a core size to wrap size ratio that
you do not want to exceed?  Finally, since the tensions increase as well,
what limits do you want to respect?

Will

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Thursday, May 21, 2009 9:24 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Steinway A Bass String Rescaling

William Truitt wrote:

> Those of you on the list who have engaged in bass string rescaling along 
> these lines, I would most appreciate your comments and your observations 
> on the aural  benefits derived from such machinations.


Getting the rebar cores replaced with something smaller and 
more flexible, like that 0.053" you noted, is a big low bass 
improvement. Add double wrapping, and you've improved the 
flexibility of the string enough that there might actually be 
some fundamental in it instead of a lot of high partial clank. 
Getting the break% up is then easy because of the smaller 
diameter core. The inharmonicity decrease is an artifact of 
these beneficial changes, and is just more or less going along 
for the ride.
Ron N