[pianotech] Bouncing Bostons

[William Monroe]

Yeah, me too, and it hasn't been an issue before.  Not checking - this is on
a firm staccato, and checking is solid.  The player is quite good and
definitely puts the Boston through it's paces - lots of Liszt, Schubert,
etc.

William R. Monroe



On Thu, Jul 29, 2010 at 9:13 PM, Bob Haymes <bobh5775 at yahoo.com> wrote:

>   I work for a company that sells Bostons, and haven't seen hammer
> bouncing as an issue.  It sounds to me like the tails are sliding out of the
> backchecks.
>
> bob
>
>
> --- On *Thu, 7/29/10, William Monroe <bill at a440piano.net>* wrote:
>
>
> From: William Monroe <bill at a440piano.net>
> Subject: [pianotech] Bouncing Bostons
> To: pianotech at ptg.org
> Date: Thursday, July 29, 2010, 8:19 PM
>
>
>  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
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100729/69b77b44/attachment.htm>