[CAUT] Sperrhake Harpsichord wire

[DCyr141833 at aol.com]

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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