- bobbling hammers-1993 Kranich&Bach Hi I've come across this problem recently with a large Kawai upright. It is in a school where the climatic conditions are changing A LOT. Plus it is being moved to another room and back again every morning, which I think increases all the problems. I began by doing the "obvious things" (key height, key depth, pilots...) but the bobbling keeps coming back. I have read with interest your advice, and so far I've tried all of them. It seems that I have to keep an eye on that instrument all the time, and every time I go there, it's a different trick that works... I hope I don't run out of tricks before it is time to start the trick list from the beginning again. Kirsi Lassi Piano Technician Finland E-mail: kirsi.lassi@pp.inet.fi >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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