[pianotech] Bouncing Boston's

[William Monroe]

Hi Greg,

Didn't check that and won't be back to the piano for a while, but I wouldn't
suspect that.  It's not like the hammer is blocking, or that it's associated
with checking.  Certainly is worth checking out, though and I'll add it to
my list.

Thanks,
William R. Monroe

>  William,
>
>                 In concert with the musing I too have encountered this (not
> only on Boston’s) and wonder if the hammer bore is correct. Do you have
> access enough to check the center pin to string height, keybed to center pin
> and subtract? I wonder if that would/could be it.
>
>
>
> Greg Newell
>
>
>
>
>
> Hi List,
>
>
>
> Anyone know of anything chronic in Boston Grands (GP178) that has the
> hammer double striking on a quick/firm staccato blow?  I've got one that
> does.  Anyone have any ideas/solutions?  The piano is finely regulated
> otherwise (just today, in fact).  1 3/4" blow, about .400" Key Travel,
> Checking about 1/2", Rep springs are definitely NOT jumpy.  In all other
> ways, the action plays nicely, controllably.  And that is no mean feat.  I
> took some DW/UW measures today out of curiousity, and they were haywire.  DW
> range from 62g - 46g, UW from 18g to 35g or so.
>
>
>
> My thoughts are turning to action pinning (haven't checked yet).  Key
> Bushings and pins are clean and lubed (teflon), but that's as far as we
> got.  Wondering if tight pinning (of any parts) might contribute to this
> rebounding back into the strings - and it is a full rebound.  You can watch
> the hammer appear to bounce off the rest rail, though I'm not convinced that
> is exactly what is happening.  Kind of musing aloud here..............
>
> William R. Monroe
>
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