Loose flange on let up? - NOT

[harel.ppp]

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
>----------------------------