<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; = -khtml-line-break: after-white-space; ">HEY... you stole my = thought!!<DIV> </DIV><DIV>:D<DIV> </DIV><DIV>I was thinking it was = something to do with the dampers/spoons too!</DIV><DIV> </DIV><DIV>:)</DIV><DIV>M <DIV><DIV>O= n Feb 1, 2006, at 1:20 PM, central wrote:</DIV> <BLOCKQUOTE type="cite"> Aaron, I had bobbling hammers = on a Yamaha P22 which only happened with the pedal down. It turned = out to be the damper pedal adjusting wing nut on the trap lever. Whe= n the pedal was down, the the dampers could be moved a slight amount by = the key. In very light playing a pianist felt resistance when the = spoons hit the damper levers and that would effectively be the bottom of = key travel, consequently bobbling hammers. Regulating it so no = movement of dampers could be seen with pedal held down solved it. = -Mike Jorgensen On 2/1/06 12:55 PM, "Vincent Mrykalo" = <<A href="mailto:v.mrykalo@utah.edu">v.mrykalo@utah.edu</A>> = wrote: <BLOCKQUOTE type="cite">Aaron, A thicker but(t) felt will do it = for you. On Jan 30, 2006, at 5:58 PM, Aaron Bousel wrote: = <BLOCKQUOTE type="cite"> Hi all, I = sent this about a week ago and got no response, so I thought I'd try = again. Thanks to all who have responded to this. UMass is on = winter break until a week from Monday and after that I'll have a chance = to get back to that piano (private customer). In response to what I've = read so far: I will of course recheck the regulation, but I don't = think that's the issue. The bobbling happens on a very soft blow when, I = suspect, the key doesn't even go all the way down, so more key dip won't = help. I'll check the profile of the butt "leather" to see if a thicker = butt felt will allow better escapement without allowing the jack to skip = out too easily. To go bac! k to why eturn springs as a = solution: On a very soft, incomplete, blow the hammer is thrown at the = string just as the jack hits let-off. The hammer then rebounds from the = string but since the key has not been fully depressed when the hammer = rebounds from the string (as someone said, it could be .005" short of = complete travel and that could make the difference) it hits the jack and = rebounds off of it. If there is no resistance in the pinning, and the = hammer springs are weak, it will just bounce off the jack, back onto the = string, back onto the jack, back onto the string, until it runs out of = energy. There was one part of my question no one answered. = That was about good quality flange bushing cloth. I haven't had to buy = any for quite a while so I was wondering about a good source. Also, = since we had the discussion about glues; does anyone use anything but = hot hide glue for rebushing flanges? And just a bit off = topic: My email program (Eudora) monitors incoming mail for ! questiona = nguage, and alerts me by marking such incoming mail with one or more = chili pepper icons in my inbox. Several of the posts on this topic = arrived with "chilis" and it took me a while to figure that the program = didn't like all this talk of "butts". I'm also looking = forward to checking out Don's info on the sticker tongue position. = (Butts and tongues--what is this list coming to?) Aaron = <BLOCKQUOTE = type="cite"> <BLOCKQUOTE = type="cite">There is a Mason & Hamlin upright model = 50 (vintage 1975) I service and at the last tuning the owner was = complaining about bobbling hammers. The hammer pinning is very loose. I = played around with the note that was bothering her the most and through = a combination of repinning and strengthening the hammer return spring = was able to all but eliminate the problem. The piano is in good = regulation. Here's the issue: The action is really poorly made. 1975 was = not e! xactly th n repinning the one I did, I could see that the flange = bushing cloth was poor quality. It would be wonderful to replace the = whole action, but that's not going to happen. Does anyone know if it's = possible to get replacement hammer flanges? These flanges are different = from the generic ones sold by piano supply houses. If that's not = possible, I have to go with rebushing what's there. Any recommendations = on a good source of flange bushing cloth? I know M&H are making = these again. Anyone know if the action design is the same? = thanks, Aaron = ------------------------------------------ Aaron Bousel = Registered Piano Technician, Piano Technicians Guild <A = href="mailto:abousel@comcast.net">abousel@comcast.net</A> = (413) 253-3846 (voice & fax) = </BLOCKQUOTE> = ----------------! --------- on Bousel Registered Piano = Technician, Piano Technicians Guild <A = href="mailto:abousel@comcast.net">abousel@comcast.net</A> = (413) 253-3846 (voice & fax) = ------------------------------------------ Aaron Bousel = <A = href="mailto:abousel@comcast.net">abousel@comcast.net</A> = (413) 253-3544 (voice) (413) 253-3846 (voice & = fax) </BLOCKQUOTE></BLOCKQUOTE> = </BLOCKQUOTE> = </BLOCKQUOTE></DIV> </DIV></DIV></BODY></HTML>=