Pinblock Fit

[Jon Page]

Wouldn't the tuning pin bushings help to restrict motion?

I would try snugging the plate screws and inserting hardwood
wedges between the flange and block to see if it makes a difference.

Jon Page


At 10:15 PM 3/19/99 -0600, you wrote:
>Greetings from the rapidly thawing Canadian prairie!
>
>Further to the discussion on pinblock fitting, could someone comment on
>Yamaha's official position on this issue?  A colleague of mine has a client
>whose C3 has a gap between block and flange tapering from 33 thou in the
>bass to about 11 thou in the treble.  The piano apparently suffers from
>tuning instability despite proper humidity control (Dampp Chaser) and
>frequent tuning.
>
>When brought to Yamaha's attention, the official factory response was that
>the gap was "within tolerance".  Is there such a tolerance for pinblock
>fit?  To me, it either contacts the flange or it doesn't.
>
>Regards to all,
>
>Stan Kroeker
>Registered Piano Technician
>