[CAUT] Sperrhake Harpsichord wire

[DCyr141833 at aol.com]

OOOPpssss   typo - Break point percentage is affted by wire  LENGTH, and 
composition.  Not by wire size.
Sorry about that.
 
Debbie  Cyr
Registered Piano Technician
508-202-2862 cell
617-227-2357 NBSS  

 
In a message dated 12/4/2009 7:49:04 A.M. Eastern Standard Time,  
DCyr141833 at aol.com writes:

The break point percentage of a given length of music wire  remains  the 
same no matter what diameter that music wire is.  So going to the  next size 
smaller, or larger, will not cause it to break more or less.   Break point 
percentage is affected by wire size, and composition.  So, if  you can't make 
the speaking length longer, or shorter, you should look to use  a wire of 
stronger materials.
 
Debbie  Cyr
Registered Piano Technician
508-202-2862 cell
617-227-2357 NBSS  

 
In a message dated 12/4/2009 7:20:30 A.M. Eastern Standard Time,  
reggaepass at aol.com writes:



In  general, if a string continues to break at a given diameter, you should 
 try thinner wire.

We've got a double-manual that routinely sheds it's smallest gauge  of 
brass wire (.014").  So, would you recommend that I try .013" brass  (if such a 
thing is to be had), or go to .013" steel, or ???
 
Thanks,
 
Alan Eder 



-----Original  Message-----
From: Fred Sturm <fssturm at unm.edu>
To:  caut at ptg.org
Sent: Thu, Dec 3, 2009 9:21 pm
Subject: Re: [CAUT]  Sperrhake Harpsichord wire

I agree with Dave.  Zuckermann kit wire is likely low tension. Sperrhake is 
likely high tension  (same stuff as piano wire, available from Schaff and 
from Hubbard, if not  from Instrument Workshop). In general, if a string 
continues to break at a  given diameter, you should try thinner wire. But in 
this case it is likely  the wrong material. 
Regards, 
Fred  Sturm 
University of New Mexico 
_fssturm at unm.edu_ (mailto:fssturm at unm.edu)  

On Dec  3, 2009, at 9:25 PM, David Doremus wrote: 

> Barbara  Richmond wrote: 
>> Hi  list, 
>> 
>> I'm having some trouble installing  replacement strings on a >> 
Sperrhake harpsichord. The wires that came  out were .009". 
> The first thought I have is that maybe you  have a low tensile iron > and 
you need a high tensile wire. Lutz at the  Instrument Workshop or > Steve 
at Zuckerman should be easily able to  supply some. I'd be > surprised if it 
is any smaller than  .008". 
> 
> 
> 
> 
> 
>  --Dave 
> 
> New  Orleans 
> 
> 











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