----- Original Message ----- From: "Joseph Garrett" <joegarrett@earthlink.net> To: <pianotech@ptg.org> Sent: Sunday, March 30, 2003 4:27 PM Subject: No Dog Leg...was Bridge Design > "..when there's no dog leg, the tension percentage adjacent to the plate > struts will be a complete disaster...." Absolutely wrong. The piano in > question is a Bechstein, which would probably have individual TIED strings > in the plain wire, which allows for corrections on a note to note basis, > allowing you to smooth out any anomolies in the strut area. Again, scale > evaluation and correction, on ALL rewhatevers, is essential, IMHO. lf, on > the oft-chance, this particular piano does not have individual tied strings, > it is still possible to add that feature to the scale/hitch pin > configuration. No biggie here. Yes, it is possible to even out the tension across the plate breaks, but there are going to be problems. Especially with bridges that are not corrected at all. The wire gages on the treble side are going to have to be made some larger than desirable and those on the bass side are going to be some smaller. Or, in some cases, just the wires on the bass side are affected in which case they are made considerably smaller than would properly be called for. Both inharmonicity and percentage of breaking strength are going to suffer. This correction may be the lessor of two evils but it is still an acoustical (and tuning) problem that can be avoided by building a proper bridge. This is one of those cases in which a solution can be made to look good on paper but the fundamental problem still exists. Del
This PTG archive page provided courtesy of Moy Piano Service, LLC