Hi Mike I do not read all the replys you got about yours knocky noise so I hope I'm not repeat someone suggestion. In a new Steinway, with to must key deep .430 and +, and a small knuckle, the top of the jack was going so high that is touch the hammer flange and maker this wood to wood sound. Serge Harel >I have changed my original subject from: "Key let up - knocky noise" > to: "Loose flange on let up? - NOT" >Sorry List, A BETTER description of the noise I heard is "a loose >flange type of sound" rather than "knock" and my first tendancy was to >check the flange screws. It is a wood-to-wood or wood-to-hard glue or >wood-to-metal "click" or "tick" or "tap" type of sound. And I am now >sorry that I used "knock" in my first posting, because "knock" would >describe a deeper tone than what I am hearing. > >Thanks to Fred T. , Ed F. , Glenn, Ralph M., Anne B. ,Roger J. , Jon P., >Vince, Bob A., Eric L. Les S., John E, Howard R. for their many >ideas... some ideas I will check out. >Other ideas I have ruled out. > > >>>>> Question # 1, clarified: >Encountered 10/7/97, 35% realive humidity, a 1965 Steinway L, teflon >bushed. >When the key is let go, on the up stroke, there is a loose flange type >of a sound. After finding the flanges tight, my second guess was a loose >hammer head, but those were also tight. I perceived the noise at a low >level throughout the action, which is >acceptable or at least bearable, but I perceived the noise at a notable >loudness on several notes, randomly, mostly in the midrange of the >piano. > >The noise is present with the action out of the piano, ruling out sharps >hitting the fallboard. The noise is present with the key isolated ( key >held down immobile- while letting hammer drop down to rep lever), ruling >out key bushings, key leads, and key to stop rail. The random, >non-consecutive appearance of the noise would rule out glides or loose >rails. >I thought, maybe the shank was hitting "tapping" the top of rep lever >height adjustment screw , but when I held a piece of bushing cloth >inbetween - still no improvement. The "shank cushion?" is plenty soft. >I squeezed the knuckle with my pliars to test hardness, and concluded >that it was about the same hardness as the adjacent non-clicky >knuckle... next time, maybe I'll switch hammer assemblies to see if >noise switches also. I don't remember testing the tightness of the >knuckle core in the shank ... I should have. Could a loose telflon >bushing cause a loud "woody tappy" noise like that? If so, how would I >test each bushing to know which needed repair? I will check the >regulation buttons at the next tuning. The noise occurs without the >jack moving away from it's rest position, ruling out the jack hitting >the opposite side of the window. >I will check out many of the suggested colliding parts that you have all >mentioned. > >Thanks, >Mike Erickson, Tucson >----------------------------
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