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<DIV>Paul,</DIV>
<DIV> </DIV>
<DIV>I almost mentioned your reshaping/polishing process [published in the PTJ].
The last couple sets of agraffes we got from Pianotek had such a nice shape
inside that we put them in as they were. Maybe we were just lucky.</DIV>
<DIV> </DIV>
<DIV>What kind of time does your process take? With agraffes at about a buck, it
seems like it would have to be a minute apiece or less to be break-even, IF we
can get good new ones; and the new ones would not have any risk of
crystallization.</DIV>
<DIV> </DIV>
<DIV>Bob Davis</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 7/10/2008 12:16:24 A.M. Pacific Daylight Time,
paulrevenkojones@aol.com writes:</DIV>
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<DIV>Bob:<BR><FONT face="Arial, Helvetica, sans-serif"><BR>Why replace them.
The inside profile of all agraffes, including new ones, is a "mesa" shaped
termination which needs to be reshaped into a proper curved profile. The old
agraffes are still good; why pay for new ones that need the same
treatment?<BR><BR>By the way, we are currently beginning an experimental
process to (no pun intended) determine the tonal differences (more or less
transient noise like this shimmer) between flat inner profile and curved inner
profile agraffes. I'll let you know. <BR><BR>Paul<BR></FONT></DIV>
<DIV><BR></DIV>
<DIV><BR></DIV>-----Original Message-----<BR>From: BobDavis88@aol.com<BR>To:
pianotech@ptg.org<BR>Sent: Thu, 10 Jul 2008 12:33 am<BR>Subject: String noises
revisited<BR><BR>
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face="Bookman Old Style" color=#000000 size=3>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Allen Wright writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000>Has anyone
working on Hamburg Steinway B's (or similar instruments)
<BR>encountered shimmery high partial noises (quite noticeable) at the
<BR>level of 4 octaves up (perhaps at the major seventh pitch or
<BR>thereabouts), in the area around E3 in the plain wire tenors?
Perhaps <BR>half dozen notes stand out like this....</FONT></BLOCKQUOTE>
<DIV>Allen, I'm still thinking about this, and, although I don't know if it
relates to the Hamburg pianos, there was a run of New York pianos in the
seventies that had a poor agraffe profile. That is to say, the shape of the
inside of the agraffe did not make a good termination. I have a couple of D's
that exhibit this in the tenor. We restrung one, changing the agraffes,
and it really cleared up the high metallic whistle. Inspecting the old and new
agraffes under magnification really showed up the difference.</DIV>
<DIV> </DIV>
<DIV>On the other D, increasing the draft angle slightly by putting a
center pin under the string (on the counterbearing felt) made a big
improvement, although we'll still eventually want to replace the
agraffes.</DIV>
<DIV> </DIV>
<DIV>Let us know when you find out for sure what it is.</DIV>
<DIV> </DIV>
<DIV>Bob Davis</DIV></FONT><BR><BR><BR>
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