[CAUT] Thumping Baldwin SF and Bechstein C

[Susan Kline]

>If your thumping has a pitch, it may be the wooden hammer rest rail that has
>just the right length and stiffness to resonate when the shanks strike it.
>If this is the case, you may be able to mute it by putting some soft felt
>pads between the rail and the nuts on the rail supports.  If this doesn't
>work, you may have to make a new rail that doesn't resonate.

I ran into this one years ago, doing warranty on a new Daewoo grand.
It had me at my wits end. Trading out the rail traded out the sound as
well, but then it just reappeared on the piano it was put on. I ended up
wedging scrap hammer felt between the rest rail and the back rail of
the keyframe, which helped quite a bit.

Susan Kline
OSU, Corvallis, OR