<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; = charset=us-ascii"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body bgcolor=white lang=EN-US link=blue vlink=purple> <div class=Section1>     -----Original = Message----- From: = pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Mike Kurta Sent: Wednesday, November 06, 2002 2:17 PM To: PTG List Subject: Boogie string = breaker   <div>     Esteemed Colleagues: </div> <div>     A local = dealer has asked this question:  He has a customer with a 1986 Yamaha U1 = studio piano.  Ever since the piano was new, bichord bass strings have = been breaking on a regular basis, now about every sixth time it's = played.  This problem was addressed under warranty by replacing all the bass = strings, but it still occurs, even today.  The player admits to being very vigorous.  The strings break between the pin and pressure bar, = leaving a 1 inch </div> <div> stub.  Hammers?  Regulation?  Strings?  Any thoughts?  = Thanks..... </div> <div>     Mike = Kurta       =             =       Mike,       =       Do you mean the V bar ?         =       I’ll bet this is the lower row of tuning pins right?       =       The P202 or its predecessors had this problem. The angle from the bottom of = the coil to the pressure bar was too acute and the V bar itself was quite = rough on those models, causing the lower row of notes to break. I haven’t = seen this on the U1’s but I would check the angle of the = string---perhaps the tuning pins where driven in too far. If indeed this is a “nut = behind the wheel” problem you could increase lettoff, and maybe shorten blow distance to decrease power to the strings or dope slap this guy and = explain the consequences of his technique.       =       Tom Driscoll </div> </div> </body> </html>