At 09:39 AM 2/12/97 -0600, Avery wrote: > I had a problem yesterday with our Hamburg D. One of our piano faculty >gave a recital last night and had been talking to me about notes "double >striking" (his term) on very soft playing. It was a VERY soft, but [...] > What really controls how much upward "throw" (I can't think of a better >term) the hammer does when adjusting the repetition? Is it strictly how high There are a lot of factors involved as you pointed out. One thing you may have missed is the balancier (wippen lever) flange. There must be some tension there in order for the spring to work smoothly. Factory specs are 3-5 gms measured at the balancier covering (aka drop screw cushion) for that flange. You may find on the worst of the notes there is no friction there at all. If that is the case the rep spring has to do all the work and on a light blow it will do what springs do... store kinetic energy and release it. Repinning the flange a little tighter should allow bushing to absorb enough of that energy to smooth out the action of the spring. Does that help? B-}) John Musselwhite, RPT Calgary, Alberta Canada musselj@cadvision.com
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