Paul, If you haven't done it already, measure the down weight, up weight, and action ratio, and let us know what they are. thanks Mike On 11/1/2010 2:58 PM, Paul McCloud wrote: > > Hi, Friends: > I've got a Brumbach action that someone rebuilt some years ago. > The pear shaped knuckles are now the standard type, and new hammers, > shanks and whippens are fitted. The capstans are relocated closer to > the balance rail. The customer's complaint is that some of the keys > are sluggish to return. After removing the action, I discovered that > jiffy weights are mounted under the keysticks just behind the front > rail. This is in addition to the leads in the keys. As it is, the > keys play ok except for a few in the bass which is where the > troublesome notes are. What I'm seeing in the action setup is that > the capstans are set too high. The top of the capstans is above the > "magic line". If you observe the capstan/heel contact point, you can > see quite a bit of sliding as you press the key. Since I am not > normally set up to rebuild actions and do all of the balancing work, I > wondered if someone could ex plain how I would go about rectifying > this action. My instinct tells me that the heel should be > taller/longer, and the capstan lowered so that they meet at a point on > the "line". What I don't know is if this will solve the problem or > just lead me down a blind alley with more problems awaiting. I don't > have downweight/upweight measurements because I misplaced my gram > weights somewhere. I also noticed that the jack and knuckle are at > a bit more of an angle than I'd like to see. I wish I had the parts > kit from Renner or Tokiwa to try some different combinations. > Interesting that this piano belonged to the late John Lennon, > and he wrote "Imagine" on it. The owner says John purchased it in New > York. I'm not sure if the work was done before John purchased it, or > later. > Any suggestions or advice are much appreciated. I do have more > photos if needed. > Paul McCloud > San Diego > pmc033 at earthlink.net <mailto:pmc033 at earthlink.net> > EarthLink Revolves Around You.
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