[CAUT] Upright key weighting

Chris Solliday csolliday at rcn.com
Thu Feb 12 21:58:32 PST 2009


Todd,
I'd recommend overhauling the key bushings and pin holes first. Either replace the key bushings and insert new pin holes (Mike Morvan may have something to help with that) or at least recondition the pin holes with alittle steam or water and apply one or two drops of VS Profelt and the appropriate size cauls ovenight. Make sure there is no or almost no lost motion at the capstan and level and dip the keys, shallower gives the perception of more weight. Then weigh off and see where you are. Back leading is standard practice on uprights. It's also worth going through all the hammer butt and damper springs to be sure there is enough tension. When considering back leading achieving a balance weight of 40 grams should give a nice firm feel that's without the dampers in play. For more in depth you might check with Ric Brekne or David Stanwood who have been doing research in this area.
Best of luck,
Chris Solliday 
  ----- Original Message ----- 
  From: Keith Roberts 
  To: caut at ptg.org 
  Sent: Thursday, February 12, 2009 11:30 PM
  Subject: Re: [CAUT] Upright key weighting


  Sounds like what he want is more mass and a slower key, not just more DW. The lead needs to be at the end of the key to slow the key down. Closer to the balance rail will cause the key to rebound quicker. 
  Keith Roberts


  On Thu, Feb 12, 2009 at 6:29 PM, Todd Loomis <teloomis at hotmail.com> wrote:

    I've got a customer with a Baldwin Classic console who complains that the touch is too light and he can't perform well on the heavier-touch pianos elsewhere.  In the center, it weighs in around 46g.  Is there a method of increasing the touch weight reliably?

    Thanks in advance,
    Todd Loomis


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