-----Original Message----- From: Conrad Hoffsommer <hoffsoco@luther.edu> To: Pianotech List <pianotech@ptg.org> Sent: Fri, 7 Dec 2007 1:26 am Subject: Re: Instability puzzler <div id=AOLMsgPart_0_53e9d93c-f567-4578-8d17-c3a121344e11 style="FONT-SIZE: 12px; MARGIN: 0px; COLOR: #000; FONT-FAMILY: Tahoma, Verdana, Arial, Sans-Serif; BACKGROUND-COLOR: #fff">Will Wickham wrote:  > Mike,  > > Take a close look at the brace. I've seen a baldwin studio and an > Everett studio that developed a crack about half way down. In both cases > the crack was discovered because of tuning instability.  > > will wickham    If you are lucky.    I discovered both of the broken Baldwin struts that I've run across so far by investigating sluggish actions. The back of the wippens were rubbing on the sides of the struts as they moved forward...    Can you say, "back away, quickly"?      -- Conrad Hoffsommer - Keyboard Technician  I discovered this on a Hamilton at a school, when I pressed the damper pedal and I heard a slight click. I discovered that the damper levers were tapping against the strut. Under normal circumstances, to get anything done in a school takes weeks of paper work and approval from the school board. But when I told the principal that that piano might explode and cause injury to the students, that piano was out of there with in the hour. Wim Luther College, 700 College Dr., Decorah, Iowa 52101-1045  1-(563)-387-1204 // Fax 1-(563)-387-1076  </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>! </div>