<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On Apr 27, 2007, at 3:49 PM, Fred Sturm wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV>Hi Jeff,</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"><SPAN class="Apple-style-span" style="white-space: pre; "> </SPAN></SPAN>On the issue of stabilizing over time (not just responding to humidity change and whatnot)<BR></DIV></SPAN></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Yes, keeping climate factors out...</DIV><BR><BLOCKQUOTE type="cite"><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV>, it may have to do, again, with low tension. The tension is causing stretch (whatever the physical/metallurgical explanation might be for it), very slowly, much more slowly than a string at higher tension.<BR></DIV></SPAN></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Yes, I agree, which is my point.</DIV><BR><BLOCKQUOTE type="cite"><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV> You can often get a string to stabilize very quickly by giving it a tuning to, say, 100 cents sharp and leaving it 24 hours or so. Then tune to pitch, and the string will behave pretty much like its neighbors, which might be 50 years old. </DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"><SPAN class="Apple-style-span" style="white-space: pre; "> </SPAN></SPAN>So that low tension string just continues to stretch for years and years because it has never had a chance to "get it out of its system" once and for all <G>.<BR></DIV></SPAN></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Yes, which is my point...</DIV></DIV><BR><DIV>...But I was questioning your and Ron's assertion that most of the pitch sag is due to bridge cap crushing (even of reused bridge with restringing?), and bends coming into the wire as it conforms to bearing angles over time, and not the wire stretch you just described. Do not the wrapped strings go through this same process also, but seem to "stabilize" long before the plain wire? If your and Ron's idea that the majority of the pitch sag comes from factors other than wire stretch or elasticity, then your higher and lower tension position doesn't seem to be supported. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>or vice versa? Anyway, what you had written made an impression, and when I got to thinking about the differences in the way the two types of wire behave under the same circumstances, it made me think to ask.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I've tuned way too many pianos the last few days.</DIV><DIV>Ya'll have a good weekend,</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Jeff</DIV><DIV><BR class="khtml-block-placeholder"></DIV><BR><BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV>Jeff Tanner, RPT</DIV><DIV>University of South Carolina</DIV><DIV><BR class="khtml-block-placeholder"></DIV><BR class="Apple-interchange-newline"></SPAN> </DIV><BR></BODY></HTML>