Bridge redone. Bicord lengths exactly equal. With first version bass bridge left string of each unison was 4 mm longer than the right. Now they are the same. Thanks for the input Ron. Some very funky triangular notching required for this arrangement (unless of course I did it a stupid way again!). Two pictures available. Terry Farrell ----- Original Message ----- From: "Ron Nossaman" <RNossaman@cox.net> To: "Pianotech" <pianotech@ptg.org> Sent: Monday, May 19, 2003 10:17 AM Subject: Re: Bass String Length Equality > > >I am redoing an upright. I have notched the new bass bridge in the bicord > >area. However, the pinned-cast-iron upper termination is in a horizontal > >line, whereas the strings are at a fair angle - hence, the left string of > >each bicord is a few millimeters longer than the right string. I should > >think it fair to assume then that redoing this upper termination to > >produce equal string lengths would be of some benefit. > > Didn't you make the notches parallel to the top bridge, or did you notch > perpendicular to the strings? If the top bridge is wood, I'd make a new one > to accommodate the notches in the lower bridge. > > If I was just replacing a bass bridge on a vertical piano without any other > extensive work, I'd just bevel it like it was originally. > > >My question is: would the benefit/difference be audible - would it make > >for a better piano to the discriminating ear? > > With the deviation as a percentage of overall length, and with the erratic > nature of wrapped strings, it's doubtful. Still, if this happens to be the > M&H you're putting all that redesign work into, it should be as clean as > you can make it. > > > >I should think the difference would be much the same as on a grand that > >has agraffes in the bass and the bicord area of the bass bridge is at a > >fair angle to the strings and is upgraded from a continuous single bevel > >to proper notching. Does this upgrade on the small grand result in an > >audible improvement? > > > >Terry Farrell > > If the agraffe is already parallel to the bevel, notching and repositioning > the agraffe so they will both be perpendicular to the string won't make any > real difference. > > Ron N > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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