Did anyone mention putting teflon on the knuckles? That is the cause of the "click first time" effect on grands in my experience. Steve At 05:15 AM 2/11/01 +0000, you wrote: >List: > >I'm working on a Yamaha C5 c1979. I just replaced the hammers and shanks. >Piano sounds great. But, the action is very noisy. Two types of noises >seem to be there: First, there is a sort of click that one frequently >hears when a note played or even tapped. Interestingly, the noise does >not occur if you keep playing the note, only on the first blow. In a >discussion with another tech, he informed me that some Yamaha keys tend to >leach sap onto the balance rail pin creating a sticky residue that (when >the pin is too tight) makes a noise (clicking type) when the key is first >played. The noise does not continue with repeated blows because the >contact has, in effect, been broken. Once the key rests for a bit, this >contact sets up again and the noise will again be heard when the key is >next played. Some of the balance rail pins are, in fact, a bit tight. I >have not heard this theory before and would be interested in some comments >if there are those who have. I can certainly ease at the balance rail, >but if this noise is in part because of some sort of residue, what can the >pins or key be lubricated with that will have a positive effect. I >normally lubricate the pins with McClube (and these pins have been >lubricated), so I suppose my question is what would you lubricate the >balance rail hole in the key with. > >Second, there is a fair amount of side to side play in the whippen flange >and I when I push the repetition spring from the side it makes a slight >click where it enters the back of the jack tender. Aside from addressing >the problem at the balance rail, my first thought was to repin the whippen >flanges and lubricate the lower part of the rep spring with some Protek >grease type lubricant. My second thought was to replace the whippens. > >Note: The problem is not loose weights either in the key or the damper >flanges (noise continues even with dampers lifted out of the way). >Backrail cloth and cloth on the heel of the whippen are fine. Leather on >the balancier is not hard. Hammer flanges are fine, and the hammer/shank >glue joint is solid. > >P.S. Though the action is somewhat "rattly", I realize that actions do >make some noise and that eliminating all of it is difficult if not >impossible. >Nevertheless, this customer is sensitive to extraneous action noise and I >would like to get it as quiet as possible. > >I appreciate your comments. > >David Love > > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com
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