<WBR>Mike<br> <br> Is it all three strings on the F# and G, or just one string? If it's just one string, is it the same string on both notes? (you know, the left sringt on F# and the right string on G)   If it is, try the becket. Perhaps on one of them it isn't in the pin hole far enough, and it keep creeping out. Which means sooner or later, it will pop out all together. Just a thought.<br> <br> <div style="CLEAR: both">Willem (Wim) Blees, RPT<br> Piano Tuner/Technician<br> Honolulu, HI<br> Author of <br> The Business of Piano Tuning<br> available from Potter Press<br> www.pianotuning.com</div> <br> <br> -----Original Message-----<br> From: Michael Kurta <mkurta@roadrunner.com><br> To: Pianotech <pianotech@ptg.org><br> Sent: Thu, 6 Dec 2007 4:43 pm<br> Subject: Instability puzzler<br> <br> <div id=AOLMsgPart_2_1d6a586c-c096-41ad-a349-e653e2f7f33c> <div><FONT face=Tahoma size=2>    Yamaha MX100 w/Disklavier (U1) 6 years old, in a H.S. vocal music room, never moved from there.  Climate controlled year around. At the tenor/treble break the F#5 and G5 go out of tune overnight!  We've had trouble with this piano since new being unstable, but its getting much worse now.  Lovely instrument, sounds great when tuned, but almost immediately goes flat around this brace.  Measured all the notes today after having pitch raised and tuned 9 days ago.  SAT says all notes within 2-3 cents except those mentioned and a few others here and there up to 15 cents flat.  Measured these again after finishing up today, and they're 5 cents flat within 45 min. </FONT></div> <div><FONT face=Tahoma size=2>    Strings look good, bridge, pins and hitch look fine, pins are tight and smooth, no plate separation from back, running out of ideas. </FONT></div> <div><FONT face=Tahoma size=2>    We called the dealer who will in turn bring Yamaha in now.  Any thoughts?</FONT></div> <div><FONT face=Tahoma size=2>    Mike Kurta</FONT></div> <div><FONT face=Tahoma size=2>    Syracuse chapter</FONT> </div> </div> <div class="AOLPromoFooter"> <hr style="margin-top:10px;" /> More new features than ever. Check out the new <a href="http://o.aolcdn.com/cdn.webmail.aol.com/mailtour/aol/en-us/text.htm?ncid=aolcmp00050000000003" target="_blank">AOL Mail</a>!<br/> </div>