Hello: I have had this problem before and fixed it by shimming the balance rail. Ed Guerra edguerra@mail.utexas.edu At 04:48 PM 2/2/98 -0600, you wrote: >Dear List, >I GIVE UP! I've been trying to help a customer of mine who bought a cheap >Kranich & Bach (made in Europe, 1993, sold by Baldwin) 42" upright. This >piano had double striking or bobbling hammers when I first saw it. To be >brief and to the point; I added let-off distance and dip, still some >bobbling on soft blows, added more, still bobbling at times, then I added >key height/dip, adjusted checking, and unless you are VERY deliberate and >get to the very end of each key stroke, IT STILL DOES IT occasionally. >Maker won't help, they said (basically) that's what you get for buying a >cheap piano. Now, the piano is no fun to play and you still get the >occasional bobble if you're not careful. > >I have come across this problem hundreds of times over the years and have >always been able to regulate it out, but I can't seem to get this one to >stop without regulating it out of the comfort zone. I remember some >Samicks and Yamahas in the low tenor had this problem due to the angle of >the surface on the butt where the jack contacts. Any ideas? Thanks very >much! >Lance Lafargue, RPT >New Orleans Chapter >Covington, LA. >lafargue@iamerica.net >
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