<div> Bob:<br> <br> <font face="Arial, Helvetica, sans-serif">The process is time-consuming, and as far as we are concerned from a tonal point of view (yet to be proved) we are quite pleased. David Carpenter and I are putting together the experimental structure to detect whatever differences we can.<br> </font></div> <font face="Arial, Helvetica, sans-serif"><br> "Crystallization"? Alpha-brass as a stable alloy doesn't crystallize as far as I know. Or am I misunderstanding you?<br> <br> Paul<br> </font> <div> <br> </div> -----Original Message-----<br> From: BobDavis88@aol.com<br> To: pianotech@ptg.org<br> Sent: Thu, 10 Jul 2008 10:32 am<br> Subject: Re: String noises revisited<br> <br> <div id="AOLMsgPart_2_2bdd7052-83d6-4457-8858-aa0d92933912"> <font id="role_document" color="#000000" face="Bookman Old Style" size="3"> <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, <a href="mailto:paulrevenkojones@aol.com">paulrevenkojones@aol.com</a> writes:</div> <blockquote style="border-left: 2px solid blue; padding-left: 5px; margin-left: 5px;"><font style="background-color: transparent;" color="#000000" face="Arial" size="2"> <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: <a href="mailto:BobDavis88@aol.com">BobDavis88@aol.com</a><br> To: <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br> Sent: Thu, 10 Jul 2008 12:33 am<br> Subject: String noises revisited<br> <br> <div id="AOLMsgPart_2_0d56c0cd-1b83-49b4-8fb7-cd544ed5456b"><font color="#000000" face="Bookman Old Style" size="3"> <div> </div> <div> </div> <div>Allen Wright writes:</div> <blockquote style="border-left: 2px solid blue; padding-left: 5px; margin-left: 5px;"><font style="background-color: transparent;" color="#000000" face="Arial">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> <div><font style="font-family: ARIAL,SAN-SERIF; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; color: black; font-size-adjust: none; font-stretch: normal;"> <hr style="margin-top: 10px;"> Get the scoop on last night's hottest shows and the live music scene in your area - <a title="http://www.tourtracker.com/?NCID=aolmus00050000000112" target="_blank" href="http://www.tourtracker.com/?NCID=aolmus00050000000112">Check out TourTracker.com</a>!</font></div> </div> <div class="aol_ad_footer" id="u8CAB07317C76BC1-23C-12E3"><font style="font-family: ARIAL,SAN-SERIF; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal; color: black;"> <hr style="margin-top: 10px;"> The Famous, the Infamous, the Lame - in your browser. <a title="http://toolbar.aol.com/tmz/download.html?NCID=aolcmp00050000000014" target="_blank" href="http://toolbar.aol.com/tmz/download.html?NCID=aolcmp00050000000014">Get the TMZ Toolbar Now</a>!</font> </div> </font></blockquote></div> </font><br> <br> <br> <div><font style="color: black; font-family: ARIAL,SAN-SERIF; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><hr style="margin-top: 10px;">Get the scoop on last night's hottest shows and the live music scene in your area - <a title="http://www.tourtracker.com?NCID=aolmus00050000000112" target="_blank" href="http://www.tourtracker.com?NCID=aolmus00050000000112">Check out TourTracker.com</a>!</font></div> </div>  <div id='u8CAB0E8FB11E9FF-750-A91' class='aol_ad_footer'><FONT style="color: black; font: normal 10pt ARIAL, SAN-SERIF;"><HR style="MARGIN-TOP: 10px">The Famous, the Infamous, the Lame - in your browser. <A title="http://toolbar.aol.com/tmz/download.html?NCID=aolcmp00050000000014" href="http://toolbar.aol.com/tmz/download.html?NCID=aolcmp00050000000014" target="_blank">Get the TMZ Toolbar Now</A>!</FONT> </div>