--- Farrell <mfarrel2@tampabay.rr.com> wrote: > "Certainly anyone who would notice that miniscule an > amount of friction should be playing a grand (?)." > > Yeah, but....... These are going into a Mason & > Hamlin upright that is being completely > remanufactured. AND this piano is getting my first > soundboard. One thing I DON'T want to happen is > showing the piano to a good pianist to demonstrate > that fabulous soundboard, and having them bet hung > up on this slow action that I also just spent 150 > hours rebuilding! I think we all know that the > weakest link is what will determine the overall > desirability of a piano. > > I'm concerned that there will be this mushy little > feel right at the end of the keystroke. Or if it > lets off just prior or at the same time as the > friction begins, it may steal a little power. I > figure MY mistakes on this piano will be conspiring > to limit some of its performance - I don't need any > identifiable and controllable sources adding to it! > Therein lies my concern. > > Terry Farrell > > ----- Original Message ----- > From: "Dave Nereson" <dnereson@dim.com> > To: "Pianotech" <pianotech@ptg.org> > Sent: Wednesday, April 23, 2003 11:17 PM > Subject: Re: Asian Hammer Butt Spring String > Friction > > > > ----- Original Message ----- > From: Farrell > To: pianotech@ptg.org > Sent: Wednesday, April 23, 2003 3:58 PM > Subject: Asian Hammer Butt Spring String Friction > > > Asian Hammer Butt Spring String Friction - say > that 3 times real fast........ > > Problem: Renner Asian-type upright hammer butts > with the integral spring and flange cord and steel > plate that retains the flange center pin. The flange > cord forms an acute angle that faces the width of > the steel center pin retainer. When the butt is at > rest, the flange cord is a millimeter or so away > from the edges of the steel plate. As the hammer is > propelled forward toward the strings, the apex of > the flange cord angle gets closer to the steel > flange and so the opening of the angle gets smaller. > Prior to the flange being parallel to the shank > (which is pretty close to the position when the > hammer would hit the string), the flange cord comes > into contact with the edge of the steel plate and > for the short distance to the flange aligning with > the hammer shank, the flange cord drags along the > edge of the steel plate. > > I can feel the resistance in the flange. I can't > imagine it should be like that. I just bought these > hammer butts from Renner. Has anyone ever noticed > this before? Does this occur on Yamahas? Any > thoughts on how this might affect performance? I'm > inclined to reject these hammer butts, but I've been > know to obsess over trivial matters before (good > enough won't cut it here). Any thoughts? > > Terry Farrell > > _______________________________________________ > pianotech list info: > https://www.moypiano.com/resources/#archives > > Yes, I've encountered this, but it was in a piano > that was also mice-infested, and I thought the mice > were chewing the spring loops, which they may have > been. I dunno, maybe the cords need to be made of > nylon or kevlar or some other space-age material. > Or all the butt plates need to be rounded off and > polished. Or get butts with longer spring loops. > There are Schwander-type butts without the butt > plates, also (conventional pinning). Haven't > noticed the problem on Yamahas -- maybe their loops > don't rub. Don't Kawais and other Asian pianos have > the same type butt? I doubt the friction is enough > to affect performance. Certainly anyone who would > notice that miniscule an amount of friction should > be playing a grand (?). --David Nereson, RPT > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives __________________________________ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com
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